994 lines
35 KiB
C
994 lines
35 KiB
C
#include <stdio.h>
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#include <string.h>
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#include "ibm.h"
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#include "disc.h"
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#include "dma.h"
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#include "io.h"
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#include "pic.h"
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#include "timer.h"
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extern int motoron;
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/*FDC*/
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typedef struct FDC
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{
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uint8_t dor,stat,command,dat,st0;
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int head,track[256],sector,drive,lastdrive;
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int pos;
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uint8_t params[256];
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uint8_t res[256];
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int pnum,ptot;
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int rate;
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uint8_t specify[256];
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int eot[256];
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int lock;
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int perp;
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uint8_t config, pretrk;
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int abort;
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uint8_t format_dat[256];
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int format_state;
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int tc;
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int written;
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int pcjr;
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int watchdog_timer;
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int watchdog_count;
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int data_ready;
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int inread;
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int dskchg_activelow;
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int enable_3f1;
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} FDC;
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static FDC fdc;
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void fdc_callback();
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int timetolive;
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//#define SECTORS 9
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int lastbyte=0;
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uint8_t disc_3f7;
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int discmodified[2];
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int discrate[2];
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int discint;
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void fdc_reset()
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{
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fdc.stat=0x80;
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fdc.pnum=fdc.ptot=0;
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fdc.st0=0xC0;
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fdc.lock = 0;
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fdc.head = 0;
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fdc.abort = 0;
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if (!AT)
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fdc.rate=2;
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// pclog("Reset FDC\n");
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}
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int ins;
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static void fdc_int()
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{
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if (!fdc.pcjr)
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picint(1 << 6);
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}
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static void fdc_watchdog_poll(void *p)
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{
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FDC *fdc = (FDC *)p;
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fdc->watchdog_count--;
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if (fdc->watchdog_count)
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fdc->watchdog_timer += 1000 * TIMER_USEC;
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else
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{
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// pclog("Watchdog timed out\n");
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fdc->watchdog_timer = 0;
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if (fdc->dor & 0x20)
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picint(1 << 6);
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}
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}
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void fdc_write(uint16_t addr, uint8_t val, void *priv)
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{
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// pclog("Write FDC %04X %02X %04X:%04X %i %02X %i rate=%i %i\n",addr,val,cs>>4,pc,ins,fdc.st0,ins,fdc.rate, fdc.data_ready);
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switch (addr&7)
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{
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case 1: return;
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case 2: /*DOR*/
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// if (val == 0xD && (cs >> 4) == 0xFC81600 && ins > 769619936) output = 3;
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// printf("DOR was %02X\n",fdc.dor);
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if (fdc.pcjr)
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{
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if ((fdc.dor & 0x40) && !(val & 0x40))
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{
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fdc.watchdog_timer = 1000 * TIMER_USEC;
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fdc.watchdog_count = 1000;
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picintc(1 << 6);
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// pclog("watchdog set %i %i\n", fdc.watchdog_timer, TIMER_USEC);
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}
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if ((val & 0x80) && !(fdc.dor & 0x80))
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{
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timer_process();
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disctime = 128 * (1 << TIMER_SHIFT);
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timer_update_outstanding();
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discint=-1;
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fdc_reset();
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}
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motoron = val & 0x01;
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/* if (motoron)
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output = 3;
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else
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output = 0;*/
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}
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else
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{
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if (val&4)
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{
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fdc.stat=0x80;
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fdc.pnum=fdc.ptot=0;
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}
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if ((val&4) && !(fdc.dor&4))
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{
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timer_process();
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disctime = 128 * (1 << TIMER_SHIFT);
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timer_update_outstanding();
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discint=-1;
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fdc_reset();
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}
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timer_process();
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motoron = (val & 0xf0) ? 1 : 0;
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timer_update_outstanding();
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}
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fdc.dor=val;
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// printf("DOR now %02X\n",val);
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return;
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case 4:
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if (val & 0x80)
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{
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timer_process();
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disctime = 128 * (1 << TIMER_SHIFT);
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timer_update_outstanding();
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discint=-1;
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fdc_reset();
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}
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return;
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case 5: /*Command register*/
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if ((fdc.stat & 0xf0) == 0xb0)
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{
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fdc.dat = val;
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fdc.stat &= ~0x80;
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break;
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}
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// if (fdc.inread)
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// rpclog("c82c711_fdc_write : writing while inread! %02X\n", val);
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// rpclog("Write command reg %i %i\n",fdc.pnum, fdc.ptot);
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if (fdc.pnum==fdc.ptot)
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{
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fdc.tc = 0;
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fdc.data_ready = 0;
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fdc.command=val;
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// pclog("Starting FDC command %02X\n",fdc.command);
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switch (fdc.command&0x1F)
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{
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case 3: /*Specify*/
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fdc.pnum=0;
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fdc.ptot=2;
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fdc.stat=0x90;
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break;
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case 4: /*Sense drive status*/
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fdc.pnum=0;
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fdc.ptot=1;
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fdc.stat=0x90;
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break;
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case 5: /*Write data*/
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// printf("Write data!\n");
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fdc.pnum=0;
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fdc.ptot=8;
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fdc.stat=0x90;
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fdc.pos=0;
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// readflash=1;
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break;
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case 6: /*Read data*/
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fdc.pnum=0;
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fdc.ptot=8;
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fdc.stat=0x90;
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fdc.pos=0;
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break;
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case 7: /*Recalibrate*/
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fdc.pnum=0;
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fdc.ptot=1;
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fdc.stat=0x90;
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break;
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case 8: /*Sense interrupt status*/
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// printf("Sense interrupt status %i\n",curdrive);
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fdc.lastdrive = fdc.drive;
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// fdc.stat = 0x10 | (fdc.stat & 0xf);
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// fdc_time=1024;
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discint = 8;
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fdc.pos = 0;
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fdc_callback();
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break;
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case 10: /*Read sector ID*/
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fdc.pnum=0;
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fdc.ptot=1;
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fdc.stat=0x90;
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fdc.pos=0;
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break;
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case 0x0d: /*Format track*/
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fdc.pnum=0;
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fdc.ptot=5;
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fdc.stat=0x90;
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fdc.pos=0;
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fdc.format_state = 0;
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break;
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case 15: /*Seek*/
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fdc.pnum=0;
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fdc.ptot=2;
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fdc.stat=0x90;
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break;
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case 0x0e: /*Dump registers*/
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fdc.lastdrive = fdc.drive;
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discint = 0x0e;
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fdc.pos = 0;
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fdc_callback();
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break;
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case 0x10: /*Get version*/
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fdc.lastdrive = fdc.drive;
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discint = 0x10;
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fdc.pos = 0;
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fdc_callback();
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break;
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case 0x12: /*Set perpendicular mode*/
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fdc.pnum=0;
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fdc.ptot=1;
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fdc.stat=0x90;
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fdc.pos=0;
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break;
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case 0x13: /*Configure*/
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fdc.pnum=0;
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fdc.ptot=3;
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fdc.stat=0x90;
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fdc.pos=0;
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break;
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case 0x14: /*Unlock*/
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case 0x94: /*Lock*/
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fdc.lastdrive = fdc.drive;
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discint = fdc.command;
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fdc.pos = 0;
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fdc_callback();
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break;
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case 0x18:
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fdc.stat = 0x10;
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discint = 0xfc;
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fdc_callback();
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break;
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default:
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fatal("Bad FDC command %02X\n",val);
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// dumpregs();
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// exit(-1);
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fdc.stat=0x10;
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discint=0xfc;
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timer_process();
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disctime = 200 * (1 << TIMER_SHIFT);
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timer_update_outstanding();
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break;
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}
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}
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else
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{
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fdc.params[fdc.pnum++]=val;
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if (fdc.pnum==fdc.ptot)
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{
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// pclog("Got all params %02X\n", fdc.command);
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fdc.stat=0x30;
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discint=fdc.command&0x1F;
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timer_process();
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disctime = 1024 * (1 << TIMER_SHIFT);
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timer_update_outstanding();
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fdc.drive = fdc.params[0] & 3;
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disc_drivesel = fdc.drive;
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switch (discint)
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{
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case 5: /*Write data*/
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fdc.track[fdc.drive]=fdc.params[1];
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fdc.head=fdc.params[2];
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fdc.sector=fdc.params[3];
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fdc.eot[fdc.drive] = fdc.params[4];
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if (fdc.config & 0x40)
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disc_seek(fdc.drive, fdc.track[fdc.drive]);
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disc_writesector(fdc.drive, fdc.sector, fdc.track[fdc.drive], fdc.head, fdc.rate);
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disctime = 0;
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fdc.written = 0;
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readflash = 1;
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fdc.pos = 0;
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if (fdc.pcjr)
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fdc.stat = 0xb0;
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// ioc_fiq(IOC_FIQ_DISC_DATA);
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break;
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case 6: /*Read data*/
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fdc.track[fdc.drive]=fdc.params[1];
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fdc.head=fdc.params[2];
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fdc.sector=fdc.params[3];
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fdc.eot[fdc.drive] = fdc.params[4];
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if (fdc.config & 0x40)
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disc_seek(fdc.drive, fdc.track[fdc.drive]);
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disc_readsector(fdc.drive, fdc.sector, fdc.track[fdc.drive], fdc.head, fdc.rate);
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disctime = 0;
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readflash = 1;
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fdc.inread = 1;
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break;
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case 7: /*Recalibrate*/
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fdc.stat = 1 << fdc.drive;
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disctime = 0;
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disc_seek(fdc.drive, 0);
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break;
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case 0x0d: /*Format*/
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fdc.format_state = 1;
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fdc.pos = 0;
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fdc.stat = 0x30;
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break;
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case 0xf: /*Seek*/
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fdc.stat = 1 << fdc.drive;
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fdc.head = (fdc.params[0] & 4) ? 1 : 0;
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disctime = 0;
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disc_seek(fdc.drive, fdc.params[1]);
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break;
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case 10: /*Read sector ID*/
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disctime = 0;
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fdc.head = (fdc.params[0] & 4) ? 1 : 0;
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// rpclog("Read sector ID %i %i\n", fdc.rate, fdc.drive);
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disc_readaddress(fdc.drive, fdc.track[fdc.drive], fdc.head, fdc.rate);
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break;
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}
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}
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}
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return;
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case 7:
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if (!AT) return;
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fdc.rate=val&3;
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disc_set_rate(fdc.rate);
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disc_3f7=val;
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return;
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}
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// printf("Write FDC %04X %02X\n",addr,val);
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// dumpregs();
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// exit(-1);
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}
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int paramstogo=0;
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uint8_t fdc_read(uint16_t addr, void *priv)
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{
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uint8_t temp;
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// /*if (addr!=0x3f4) */printf("Read FDC %04X %04X:%04X %04X %i %02X %02x %i ",addr,cs>>4,pc,BX,fdc.pos,fdc.st0,fdc.stat,ins);
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switch (addr&7)
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{
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case 1: /*???*/
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if (!fdc.enable_3f1)
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return 0xff;
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// temp=0x50;
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temp = 0x70;
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if (fdc.dor & 1)
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temp &= ~0x40;
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else
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temp &= ~0x20;
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break;
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case 3:
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temp = 0x20;
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break;
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case 4: /*Status*/
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temp=fdc.stat;
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break;
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case 5: /*Data*/
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fdc.stat&=~0x80;
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if ((fdc.stat & 0xf0) == 0xf0)
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{
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temp = fdc.dat;
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break;
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}
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if (paramstogo)
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{
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paramstogo--;
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temp=fdc.res[10 - paramstogo];
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// pclog("Read param %i %02X\n",10-paramstogo,temp);
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if (!paramstogo)
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{
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fdc.stat=0x80;
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// fdc.st0=0;
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}
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else
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{
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fdc.stat|=0xC0;
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// fdc_poll();
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}
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}
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else
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{
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if (lastbyte)
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fdc.stat = 0x80;
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lastbyte=0;
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temp=fdc.dat;
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fdc.data_ready = 0;
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}
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if (discint==0xA)
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{
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timer_process();
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disctime = 1024 * (1 << TIMER_SHIFT);
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timer_update_outstanding();
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}
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fdc.stat &= 0xf0;
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break;
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case 7: /*Disk change*/
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if (fdc.dor & (0x10 << (fdc.dor & 1)))
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temp = (disc_changed[fdc.dor & 1] || drive_empty[fdc.dor & 1])?0x80:0;
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else
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temp = 0;
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if (fdc.dskchg_activelow) /*PC2086/3086 seem to reverse this bit*/
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temp ^= 0x80;
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// printf("- DC %i %02X %02X %i %i - ",fdc.dor & 1, fdc.dor, 0x10 << (fdc.dor & 1), discchanged[fdc.dor & 1], driveempty[fdc.dor & 1]);
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// discchanged[fdc.dor&1]=0;
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break;
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default:
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temp=0xFF;
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// printf("Bad read FDC %04X\n",addr);
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// dumpregs();
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// exit(-1);
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}
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// /*if (addr!=0x3f4) */printf("%02X rate=%i %i\n",temp,fdc.rate, fdc.data_ready);
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return temp;
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}
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static int fdc_reset_stat = 0;
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void fdc_callback()
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{
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int temp;
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disctime = 0;
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// pclog("fdc_callback %i %i\n", discint, disctime);
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// if (fdc.inread)
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// rpclog("c82c711_fdc_callback : while inread! %08X %i %02X %i\n", discint, fdc.drive, fdc.st0, ins);
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switch (discint)
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{
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case -3: /*End of command with interrupt*/
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// if (output) printf("EOC - interrupt!\n");
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//rpclog("EOC\n");
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fdc_int();
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case -2: /*End of command*/
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fdc.stat = (fdc.stat & 0xf) | 0x80;
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return;
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case -1: /*Reset*/
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//rpclog("Reset\n");
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fdc_int();
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fdc_reset_stat = 4;
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return;
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case 2: /*Read track*/
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/* if (!fdc.pos)
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{
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// printf("Read Track Side %i Track %i Sector %02X sector size %i end sector %02X %05X\n",fdc.head,fdc.track,fdc.sector,fdc.params[4],fdc.params[5],(dma.page[2]<<16)+dma.ac[2]);
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}
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if (fdc.pos<512)
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{
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fdc.dat=disc[fdc.drive][fdc.head][fdc.track[fdc.drive]][fdc.sector-1][fdc.pos];
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// pclog("Read %i %i %i %i %02X\n",fdc.head,fdc.track,fdc.sector,fdc.pos,fdc.dat);
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if (fdc.pcjr)
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fdc.stat = 0xf0;
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else
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dma_channel_write(2, fdc.dat);
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timer_process();
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disctime = 60 * (1 << TIMER_SHIFT);
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timer_update_outstanding();
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}
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else
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{
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disctime=0;
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discint=-2;
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// pclog("RT\n");
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fdc_int();
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fdc.stat=0xD0;
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fdc.res[4]=(fdc.head?4:0)|fdc.drive;
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fdc.res[5]=fdc.res[2]=0;
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fdc.res[6]=fdc.track[fdc.drive];
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fdc.res[7]=fdc.head;
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fdc.res[8]=fdc.sector;
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fdc.res[9]=fdc.params[4];
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paramstogo=7;
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return;
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}
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fdc.pos++;
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if (fdc.pos==512 && fdc.params[5]!=1)
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{
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fdc.pos=0;
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fdc.sector++;
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if (fdc.sector==SECTORS[fdc.drive]+1)
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{
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fdc.sector=1;
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}
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fdc.params[5]--;
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}*/
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|
return;
|
|
case 3: /*Specify*/
|
|
fdc.stat=0x80;
|
|
fdc.specify[0] = fdc.params[0];
|
|
fdc.specify[1] = fdc.params[1];
|
|
return;
|
|
case 4: /*Sense drive status*/
|
|
fdc.res[10] = (fdc.params[0] & 7) | 0x28;
|
|
if (!fdc.track[fdc.drive])
|
|
fdc.res[10] |= 0x10;
|
|
if (writeprot[fdc.drive])
|
|
fdc.res[10] |= 0x40;
|
|
|
|
fdc.stat = (fdc.stat & 0xf) | 0xd0;
|
|
paramstogo = 1;
|
|
discint = 0;
|
|
disctime = 0;
|
|
return;
|
|
case 5: /*Write data*/
|
|
readflash = 1;
|
|
fdc.sector++;
|
|
if (fdc.sector > fdc.params[5])
|
|
{
|
|
if (fdc.command & 0x80)
|
|
{
|
|
fdc.sector=1;
|
|
fdc.head ^= 1;
|
|
if (!fdc.head)
|
|
{
|
|
fdc.track[fdc.drive]++;
|
|
/* if (fdc.track[fdc.drive] >= 79)
|
|
{
|
|
fdc.track[fdc.drive] = 79;
|
|
fdc.tc = 1;
|
|
}*/
|
|
}
|
|
}
|
|
else
|
|
fdc.tc = 1;
|
|
}
|
|
if (fdc.tc)
|
|
{
|
|
discint=-2;
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4]=(fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5]=fdc.res[6]=0;
|
|
fdc.res[7]=fdc.track[fdc.drive];
|
|
fdc.res[8]=fdc.head;
|
|
fdc.res[9]=fdc.sector;
|
|
fdc.res[10]=fdc.params[4];
|
|
paramstogo=7;
|
|
return;
|
|
}
|
|
disc_writesector(fdc.drive, fdc.sector, fdc.track[fdc.drive], fdc.head, fdc.rate);
|
|
// ioc_fiq(IOC_FIQ_DISC_DATA);
|
|
return;
|
|
case 6: /*Read data*/
|
|
// rpclog("Read data %i\n", fdc.tc);
|
|
readflash = 1;
|
|
fdc.sector++;
|
|
if (fdc.sector > fdc.params[5])
|
|
{
|
|
if (fdc.command & 0x80)
|
|
{
|
|
fdc.sector=1;
|
|
fdc.head ^= 1;
|
|
if (!fdc.head)
|
|
{
|
|
fdc.track[fdc.drive]++;
|
|
/* if (fdc.track[fdc.drive] >= 79)
|
|
{
|
|
fdc.track[fdc.drive] = 79;
|
|
fdc.tc = 1;
|
|
}*/
|
|
}
|
|
}
|
|
else
|
|
fdc.tc = 1;
|
|
}
|
|
if (fdc.tc)
|
|
{
|
|
fdc.inread = 0;
|
|
discint=-2;
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4]=(fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5]=fdc.res[6]=0;
|
|
fdc.res[7]=fdc.track[fdc.drive];
|
|
fdc.res[8]=fdc.head;
|
|
fdc.res[9]=fdc.sector;
|
|
fdc.res[10]=fdc.params[4];
|
|
paramstogo=7;
|
|
return;
|
|
}
|
|
disc_readsector(fdc.drive, fdc.sector, fdc.track[fdc.drive], fdc.head, fdc.rate);
|
|
fdc.inread = 1;
|
|
return;
|
|
|
|
case 7: /*Recalibrate*/
|
|
fdc.track[fdc.drive]=0;
|
|
// if (!driveempty[fdc.dor & 1]) discchanged[fdc.dor & 1] = 0;
|
|
fdc.st0=0x20|fdc.drive|(fdc.head?4:0);
|
|
discint=-3;
|
|
timer_process();
|
|
disctime = 2048 * (1 << TIMER_SHIFT);
|
|
timer_update_outstanding();
|
|
// printf("Recalibrate complete!\n");
|
|
fdc.stat = 0x80 | (1 << fdc.drive);
|
|
return;
|
|
|
|
case 8: /*Sense interrupt status*/
|
|
// pclog("Sense interrupt status %i\n", fdc_reset_stat);
|
|
|
|
fdc.dat = fdc.st0;
|
|
|
|
if (fdc_reset_stat)
|
|
{
|
|
fdc.st0 = (fdc.st0 & 0xf8) | (4 - fdc_reset_stat) | (fdc.head ? 4 : 0);
|
|
fdc_reset_stat--;
|
|
}
|
|
fdc.stat = (fdc.stat & 0xf) | 0xd0;
|
|
fdc.res[9] = fdc.st0;
|
|
fdc.res[10] = fdc.track[fdc.drive];
|
|
if (!fdc_reset_stat) fdc.st0 = 0x80;
|
|
|
|
paramstogo = 2;
|
|
discint = 0;
|
|
disctime = 0;
|
|
return;
|
|
|
|
case 0x0d: /*Format track*/
|
|
// rpclog("Format\n");
|
|
if (fdc.format_state == 1)
|
|
{
|
|
// ioc_fiq(IOC_FIQ_DISC_DATA);
|
|
fdc.format_state = 2;
|
|
timer_process();
|
|
disctime = 128 * (1 << TIMER_SHIFT);
|
|
timer_update_outstanding();
|
|
}
|
|
else if (fdc.format_state == 2)
|
|
{
|
|
temp = fdc_getdata(fdc.pos == ((fdc.params[2] * 4) - 1));
|
|
if (temp == -1)
|
|
{
|
|
timer_process();
|
|
disctime = 128 * (1 << TIMER_SHIFT);
|
|
timer_update_outstanding();
|
|
return;
|
|
}
|
|
fdc.format_dat[fdc.pos++] = temp;
|
|
if (fdc.pos == (fdc.params[2] * 4))
|
|
fdc.format_state = 3;
|
|
timer_process();
|
|
disctime = 128 * (1 << TIMER_SHIFT);
|
|
timer_update_outstanding();
|
|
}
|
|
else if (fdc.format_state == 4)
|
|
{
|
|
// rpclog("Format next stage\n");
|
|
disc_format(fdc.drive, fdc.track[fdc.drive], fdc.head, fdc.rate);
|
|
fdc.format_state = 4;
|
|
}
|
|
else
|
|
{
|
|
discint=-2;
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4] = (fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5] = fdc.res[6] = 0;
|
|
fdc.res[7] = fdc.track[fdc.drive];
|
|
fdc.res[8] = fdc.head;
|
|
fdc.res[9] = fdc.format_dat[fdc.pos - 2] + 1;
|
|
fdc.res[10] = fdc.params[4];
|
|
paramstogo=7;
|
|
fdc.format_state = 0;
|
|
return;
|
|
}
|
|
return;
|
|
|
|
case 15: /*Seek*/
|
|
fdc.track[fdc.drive]=fdc.params[1];
|
|
// if (!driveempty[fdc.dor & 1]) discchanged[fdc.dor & 1] = 0;
|
|
// printf("Seeked to track %i %i\n",fdc.track[fdc.drive], fdc.drive);
|
|
fdc.st0=0x20|fdc.drive|(fdc.head?4:0);
|
|
discint=-3;
|
|
timer_process();
|
|
disctime = 2048 * (1 << TIMER_SHIFT);
|
|
timer_update_outstanding();
|
|
fdc.stat = 0x80 | (1 << fdc.drive);
|
|
// pclog("Stat %02X ST0 %02X\n", fdc.stat, fdc.st0);
|
|
return;
|
|
case 0x0e: /*Dump registers*/
|
|
fdc.stat = (fdc.stat & 0xf) | 0xd0;
|
|
fdc.res[3] = fdc.track[0];
|
|
fdc.res[4] = fdc.track[1];
|
|
fdc.res[5] = 0;
|
|
fdc.res[6] = 0;
|
|
fdc.res[7] = fdc.specify[0];
|
|
fdc.res[8] = fdc.specify[1];
|
|
fdc.res[9] = fdc.eot[fdc.drive];
|
|
fdc.res[10] = (fdc.perp & 0x7f) | ((fdc.lock) ? 0x80 : 0);
|
|
paramstogo=10;
|
|
discint=0;
|
|
disctime = 0;
|
|
return;
|
|
|
|
case 0x10: /*Version*/
|
|
fdc.stat = (fdc.stat & 0xf) | 0xd0;
|
|
fdc.res[10] = 0x90;
|
|
paramstogo=1;
|
|
discint=0;
|
|
disctime = 0;
|
|
return;
|
|
|
|
case 0x12:
|
|
fdc.perp = fdc.params[0];
|
|
fdc.stat = 0x80;
|
|
disctime = 0;
|
|
// picint(0x40);
|
|
return;
|
|
case 0x13: /*Configure*/
|
|
fdc.config = fdc.params[1];
|
|
fdc.pretrk = fdc.params[2];
|
|
fdc.stat = 0x80;
|
|
disctime = 0;
|
|
// picint(0x40);
|
|
return;
|
|
case 0x14: /*Unlock*/
|
|
fdc.lock = 0;
|
|
fdc.stat = (fdc.stat & 0xf) | 0xd0;
|
|
fdc.res[10] = 0;
|
|
paramstogo=1;
|
|
discint=0;
|
|
disctime = 0;
|
|
return;
|
|
case 0x94: /*Lock*/
|
|
fdc.lock = 1;
|
|
fdc.stat = (fdc.stat & 0xf) | 0xd0;
|
|
fdc.res[10] = 0x10;
|
|
paramstogo=1;
|
|
discint=0;
|
|
disctime = 0;
|
|
return;
|
|
|
|
|
|
case 0xfc: /*Invalid*/
|
|
fdc.dat = fdc.st0 = 0x80;
|
|
// pclog("Inv!\n");
|
|
//picint(0x40);
|
|
fdc.stat = (fdc.stat & 0xf) | 0xd0;
|
|
// fdc.stat|=0xC0;
|
|
fdc.res[10] = fdc.st0;
|
|
paramstogo=1;
|
|
discint=0;
|
|
disctime = 0;
|
|
return;
|
|
}
|
|
// printf("Bad FDC disc int %i\n",discint);
|
|
// dumpregs();
|
|
// exit(-1);
|
|
}
|
|
|
|
void fdc_overrun()
|
|
{
|
|
img_stop();
|
|
disctime = 0;
|
|
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4]=0x40|(fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5]=0x10; /*Overrun*/
|
|
fdc.res[6]=0;
|
|
fdc.res[7]=0;
|
|
fdc.res[8]=0;
|
|
fdc.res[9]=0;
|
|
fdc.res[10]=0;
|
|
paramstogo=7;
|
|
}
|
|
|
|
int fdc_data(uint8_t data)
|
|
{
|
|
if (fdc.tc)
|
|
return 0;
|
|
|
|
if (fdc.pcjr)
|
|
{
|
|
if (fdc.data_ready)
|
|
{
|
|
fdc_overrun();
|
|
// pclog("Overrun\n");
|
|
return -1;
|
|
}
|
|
|
|
fdc.dat = data;
|
|
fdc.data_ready = 1;
|
|
fdc.stat = 0xf0;
|
|
// pclog("fdc_data\n");
|
|
}
|
|
else
|
|
{
|
|
if (dma_channel_write(2, data) & DMA_OVER)
|
|
fdc.tc = 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void fdc_finishread()
|
|
{
|
|
fdc.inread = 0;
|
|
disctime = 200 * TIMER_USEC;
|
|
// rpclog("fdc_finishread\n");
|
|
}
|
|
|
|
void fdc_notfound()
|
|
{
|
|
disctime = 0;
|
|
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4]=0x40|(fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5]=5;
|
|
fdc.res[6]=0;
|
|
fdc.res[7]=0;
|
|
fdc.res[8]=0;
|
|
fdc.res[9]=0;
|
|
fdc.res[10]=0;
|
|
paramstogo=7;
|
|
// rpclog("c82c711_fdc_notfound\n");
|
|
}
|
|
|
|
void fdc_datacrcerror()
|
|
{
|
|
disctime = 0;
|
|
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4]=0x40|(fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5]=0x20; /*Data error*/
|
|
fdc.res[6]=0x20; /*Data error in data field*/
|
|
fdc.res[7]=0;
|
|
fdc.res[8]=0;
|
|
fdc.res[9]=0;
|
|
fdc.res[10]=0;
|
|
paramstogo=7;
|
|
// rpclog("c82c711_fdc_datacrcerror\n");
|
|
}
|
|
|
|
void fdc_headercrcerror()
|
|
{
|
|
disctime = 0;
|
|
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4]=0x40|(fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5]=0x20; /*Data error*/
|
|
fdc.res[6]=0;
|
|
fdc.res[7]=0;
|
|
fdc.res[8]=0;
|
|
fdc.res[9]=0;
|
|
fdc.res[10]=0;
|
|
paramstogo=7;
|
|
// rpclog("c82c711_fdc_headercrcerror\n");
|
|
}
|
|
|
|
void fdc_writeprotect()
|
|
{
|
|
disctime = 0;
|
|
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4]=0x40|(fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5]=0x02; /*Not writeable*/
|
|
fdc.res[6]=0;
|
|
fdc.res[7]=0;
|
|
fdc.res[8]=0;
|
|
fdc.res[9]=0;
|
|
fdc.res[10]=0;
|
|
paramstogo=7;
|
|
}
|
|
|
|
int fdc_getdata(int last)
|
|
{
|
|
int data;
|
|
|
|
if (fdc.pcjr)
|
|
{
|
|
if (fdc.written)
|
|
{
|
|
fdc_overrun();
|
|
// pclog("Overrun\n");
|
|
return -1;
|
|
}
|
|
data = fdc.dat;
|
|
if (!last)
|
|
fdc.stat = 0xb0;
|
|
}
|
|
else
|
|
{
|
|
data = dma_channel_read(2);
|
|
|
|
if (data & DMA_OVER)
|
|
fdc.tc = 1;
|
|
}
|
|
|
|
fdc.written = 0;
|
|
return data & 0xff;
|
|
}
|
|
|
|
void fdc_sectorid(uint8_t track, uint8_t side, uint8_t sector, uint8_t size, uint8_t crc1, uint8_t crc2)
|
|
{
|
|
// pclog("SectorID %i %i %i %i\n", track, side, sector, size);
|
|
fdc_int();
|
|
fdc.stat=0xD0;
|
|
fdc.res[4]=(fdc.head?4:0)|fdc.drive;
|
|
fdc.res[5]=0;
|
|
fdc.res[6]=0;
|
|
fdc.res[7]=track;
|
|
fdc.res[8]=side;
|
|
fdc.res[9]=sector;
|
|
fdc.res[10]=size;
|
|
paramstogo=7;
|
|
}
|
|
|
|
void fdc_indexpulse()
|
|
{
|
|
// ioc_irqa(IOC_IRQA_DISC_INDEX);
|
|
// rpclog("c82c711_fdc_indexpulse\n");
|
|
}
|
|
|
|
void fdc_init()
|
|
{
|
|
timer_add(fdc_callback, &disctime, &disctime, NULL);
|
|
fdc.dskchg_activelow = 0;
|
|
fdc.enable_3f1 = 1;
|
|
}
|
|
|
|
void fdc_add()
|
|
{
|
|
io_sethandler(0x03f0, 0x0006, fdc_read, NULL, NULL, fdc_write, NULL, NULL, NULL);
|
|
io_sethandler(0x03f7, 0x0001, fdc_read, NULL, NULL, fdc_write, NULL, NULL, NULL);
|
|
fdc.pcjr = 0;
|
|
}
|
|
|
|
void fdc_add_pcjr()
|
|
{
|
|
io_sethandler(0x00f0, 0x0006, fdc_read, NULL, NULL, fdc_write, NULL, NULL, NULL);
|
|
timer_add(fdc_watchdog_poll, &fdc.watchdog_timer, &fdc.watchdog_timer, &fdc);
|
|
fdc.pcjr = 1;
|
|
}
|
|
|
|
void fdc_remove()
|
|
{
|
|
io_removehandler(0x03f0, 0x0006, fdc_read, NULL, NULL, fdc_write, NULL, NULL, NULL);
|
|
io_removehandler(0x03f7, 0x0001, fdc_read, NULL, NULL, fdc_write, NULL, NULL, NULL);
|
|
}
|
|
|
|
void fdc_discchange_clear(int drive)
|
|
{
|
|
if (drive < 2)
|
|
disc_changed[drive] = 0;
|
|
}
|
|
|
|
void fdc_set_dskchg_activelow()
|
|
{
|
|
fdc.dskchg_activelow = 1;
|
|
}
|
|
|
|
void fdc_3f1_enable(int enable)
|
|
{
|
|
fdc.enable_3f1 = enable;
|
|
}
|