152 lines
4.8 KiB
C
152 lines
4.8 KiB
C
#include "ibm.h"
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#include "mem.h"
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#include "ps1.h"
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#include "rom.h"
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#include "lpt.h"
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static rom_t ps1_high_rom;
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static uint8_t ps1_92, ps1_94, ps1_102, ps1_103, ps1_104, ps1_105, ps1_190;
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static struct
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{
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uint8_t status, int_status;
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uint8_t attention, ctrl;
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} ps1_hd;
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uint8_t ps1_read(uint16_t port, void *p)
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{
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uint8_t temp;
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switch (port)
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{
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case 0x91:
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return 0;
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case 0x92:
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return ps1_92;
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case 0x94:
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return ps1_94;
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case 0x102:
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return ps1_102 | 8;
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case 0x103:
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return ps1_103;
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case 0x104:
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return ps1_104;
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case 0x105:
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return ps1_105;
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case 0x190:
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return ps1_190;
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case 0x322:
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temp = ps1_hd.status;
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break;
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case 0x324:
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temp = ps1_hd.int_status;
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ps1_hd.int_status &= ~0x02;
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break;
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default:
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temp = 0xff;
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break;
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}
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return temp;
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}
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void ps1_write(uint16_t port, uint8_t val, void *p)
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{
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switch (port)
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{
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case 0x0092:
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ps1_92 = val;
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mem_a20_alt = val & 2;
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mem_a20_recalc();
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break;
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case 0x94:
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ps1_94 = val;
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break;
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case 0x102:
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lpt1_remove();
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if (val & 0x04)
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serial1_init(0x3f8, 4);
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else
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serial1_remove();
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if (val & 0x10)
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{
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switch ((val >> 5) & 3)
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{
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case 0:
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lpt1_init(0x3bc);
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break;
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case 1:
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lpt1_init(0x378);
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break;
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case 2:
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lpt1_init(0x278);
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break;
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}
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}
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ps1_102 = val;
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break;
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case 0x103:
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ps1_103 = val;
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break;
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case 0x104:
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ps1_104 = val;
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break;
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case 0x105:
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ps1_105 = val;
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break;
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case 0x190:
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ps1_190 = val;
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break;
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case 0x322:
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ps1_hd.ctrl = val;
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if (val & 0x80)
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ps1_hd.status |= 0x02;
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break;
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case 0x324:
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ps1_hd.attention = val & 0xf0;
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if (ps1_hd.attention)
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ps1_hd.status = 0x14;
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break;
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}
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}
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void ps1mb_init()
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{
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io_sethandler(0x0091, 0x0001, ps1_read, NULL, NULL, ps1_write, NULL, NULL, NULL);
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io_sethandler(0x0092, 0x0001, ps1_read, NULL, NULL, ps1_write, NULL, NULL, NULL);
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io_sethandler(0x0094, 0x0001, ps1_read, NULL, NULL, ps1_write, NULL, NULL, NULL);
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io_sethandler(0x0102, 0x0004, ps1_read, NULL, NULL, ps1_write, NULL, NULL, NULL);
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io_sethandler(0x0190, 0x0001, ps1_read, NULL, NULL, ps1_write, NULL, NULL, NULL);
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io_sethandler(0x0320, 0x0001, ps1_read, NULL, NULL, ps1_write, NULL, NULL, NULL);
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io_sethandler(0x0322, 0x0001, ps1_read, NULL, NULL, ps1_write, NULL, NULL, NULL);
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io_sethandler(0x0324, 0x0001, ps1_read, NULL, NULL, ps1_write, NULL, NULL, NULL);
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rom_init(&ps1_high_rom,
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"roms/ibmps1es/f80000.bin",
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0xf80000,
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0x80000,
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0x7ffff,
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0,
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MEM_MAPPING_EXTERNAL);
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/* rom_init_interleaved(&ps1_high_rom,
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"roms/ibmps1es/ibm_1057757_24-05-90.bin",
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"roms/ibmps1es/ibm_1057757_29-15-90.bin",
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0xfc0000,
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0x40000,
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0x3ffff,
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0,
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MEM_MAPPING_EXTERNAL);*/
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ps1_190 = 0;
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lpt1_remove();
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lpt2_remove();
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lpt1_init(0x3bc);
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serial1_remove();
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serial2_remove();
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memset(&ps1_hd, 0, sizeof(ps1_hd));
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}
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