84ac04d2df
Added emulation of i430LX and i430FX chipsets. Added support for PCI configuration type 2, used by i430LX. Added AT disable keyboard command, and fixed enable keyboard command. Added emulation of Intel 28F001BXT flash ROM, used by Advanced/EV. Fixed a bug in REP when using multiple 66/67 prefixes.
143 lines
5.3 KiB
C
143 lines
5.3 KiB
C
#include <string.h>
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#include "ibm.h"
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#include "mem.h"
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#include "pci.h"
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#include "i430fx.h"
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static uint8_t card_i430fx[256];
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static void i430fx_map(uint32_t addr, uint32_t size, int state)
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{
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switch (state & 3)
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{
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case 0:
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mem_set_mem_state(addr, size, MEM_READ_EXTERNAL | MEM_WRITE_EXTERNAL);
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break;
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case 1:
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mem_set_mem_state(addr, size, MEM_READ_INTERNAL | MEM_WRITE_EXTERNAL);
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break;
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case 2:
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mem_set_mem_state(addr, size, MEM_READ_EXTERNAL | MEM_WRITE_INTERNAL);
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break;
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case 3:
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mem_set_mem_state(addr, size, MEM_READ_INTERNAL | MEM_WRITE_INTERNAL);
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break;
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}
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flushmmucache_nopc();
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}
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void i430fx_write(int func, int addr, uint8_t val, void *priv)
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{
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if (func)
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return;
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switch (addr)
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{
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case 0x00: case 0x01: case 0x02: case 0x03:
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case 0x08: case 0x09: case 0x0a: case 0x0b:
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case 0x0e:
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return;
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case 0x59: /*PAM0*/
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if ((card_i430fx[0x59] ^ val) & 0xf0)
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{
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i430fx_map(0xf0000, 0x10000, val >> 4);
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shadowbios = (val & 0x10);
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}
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pclog("i430fx_write : PAM0 write %02X\n", val);
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break;
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case 0x5a: /*PAM1*/
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if ((card_i430fx[0x5a] ^ val) & 0x0f)
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i430fx_map(0xc0000, 0x04000, val & 0xf);
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if ((card_i430fx[0x5a] ^ val) & 0xf0)
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i430fx_map(0xc4000, 0x04000, val >> 4);
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break;
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case 0x5b: /*PAM2*/
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if ((card_i430fx[0x5b] ^ val) & 0x0f)
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i430fx_map(0xc8000, 0x04000, val & 0xf);
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if ((card_i430fx[0x5b] ^ val) & 0xf0)
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i430fx_map(0xcc000, 0x04000, val >> 4);
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break;
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case 0x5c: /*PAM3*/
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if ((card_i430fx[0x5c] ^ val) & 0x0f)
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i430fx_map(0xd0000, 0x04000, val & 0xf);
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if ((card_i430fx[0x5c] ^ val) & 0xf0)
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i430fx_map(0xd4000, 0x04000, val >> 4);
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break;
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case 0x5d: /*PAM4*/
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if ((card_i430fx[0x5d] ^ val) & 0x0f)
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i430fx_map(0xd8000, 0x04000, val & 0xf);
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if ((card_i430fx[0x5d] ^ val) & 0xf0)
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i430fx_map(0xdc000, 0x04000, val >> 4);
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break;
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case 0x5e: /*PAM5*/
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if ((card_i430fx[0x5e] ^ val) & 0x0f)
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i430fx_map(0xe0000, 0x04000, val & 0xf);
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if ((card_i430fx[0x5e] ^ val) & 0xf0)
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i430fx_map(0xe4000, 0x04000, val >> 4);
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pclog("i430fx_write : PAM5 write %02X\n", val);
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break;
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case 0x5f: /*PAM6*/
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if ((card_i430fx[0x5f] ^ val) & 0x0f)
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i430fx_map(0xe8000, 0x04000, val & 0xf);
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if ((card_i430fx[0x5f] ^ val) & 0xf0)
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i430fx_map(0xec000, 0x04000, val >> 4);
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pclog("i430fx_write : PAM6 write %02X\n", val);
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break;
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}
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card_i430fx[addr] = val;
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}
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uint8_t i430fx_read(int func, int addr, void *priv)
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{
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if (func)
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return 0xff;
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return card_i430fx[addr];
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}
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/*The Turbo-Reset Control Register isn't listed in the i430FX datasheet, however
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the Advanced/EV BIOS seems to assume it exists. It aliases with one of the PCI
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registers.*/
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static uint8_t trc = 0;
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void i430fx_trc_write(uint16_t port, uint8_t val, void *p)
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{
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if ((val & 4) && !(trc & 4))
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{
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if (val & 2) /*Hard reset*/
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i430fx_write(0, 0x59, 0xf, NULL); /*Should reset all PCI devices, but just set PAM0 to point to ROM for now*/
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resetx86();
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}
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trc = val;
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}
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void i430fx_init()
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{
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pci_add_specific(0, i430fx_read, i430fx_write, NULL);
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memset(card_i430fx, 0, 256);
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card_i430fx[0x00] = 0x86; card_i430fx[0x01] = 0x80; /*Intel*/
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card_i430fx[0x02] = 0x22; card_i430fx[0x03] = 0x01; /*SB82437FX-66*/
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card_i430fx[0x04] = 0x06; card_i430fx[0x05] = 0x00;
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card_i430fx[0x06] = 0x00; card_i430fx[0x07] = 0x82;
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card_i430fx[0x08] = 0x00; /*A0 stepping*/
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card_i430fx[0x09] = 0x00; card_i430fx[0x0a] = 0x00; card_i430fx[0x0b] = 0x06;
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card_i430fx[0x52] = 0x40; /*256kb PLB cache*/
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// card_i430fx[0x53] = 0x14;
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// card_i430fx[0x56] = 0x52; /*DRAM control*/
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card_i430fx[0x57] = 0x01;
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card_i430fx[0x60] = card_i430fx[0x61] = card_i430fx[0x62] = card_i430fx[0x63] = card_i430fx[0x64] = 0x02;
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// card_i430fx[0x67] = 0x11;
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// card_i430fx[0x69] = 0x03;
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// card_i430fx[0x70] = 0x20;
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card_i430fx[0x72] = 0x02;
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// card_i430fx[0x74] = 0x0e;
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// card_i430fx[0x78] = 0x23;
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io_sethandler(0x0cf9, 0x0001, NULL, NULL, NULL, i430fx_trc_write, NULL, NULL, NULL);
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}
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