80486DX2-66/86Box-fork
1
0
Fork 0
Code Issues Pull Requests Activity

Merge pull request #911 from nerd73/opti291

Browse Source 
Implement F0000-FFFFF shadowing on the OPTi 291
This commit is contained in:
Miran Grča
2020-07-08 22:03:06 +02:00
committed by GitHub
parent ab5df882e9 8be211c69a
commit 2f720b6c07
2 changed files with 26 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
src/chipset/opti291.c
View File

@@ -35,33 +35,41 @@ typedef struct
{
uint8_t index,
regs[256];
port_92_t *port_92;
} opti291_t;
static void opti291_recalc(opti291_t *dev)
{
uint32_t base;
uint32_t i, shflags, write = 0;
uint32_t i, shflags, write, writef = 0;
writef = (dev->regs[0x27] & 0x80) ? MEM_WRITE_DISABLED : MEM_WRITE_INTERNAL;
if (!(dev->regs[0x23] & 0x40))
mem_set_mem_state(0xf0000, 0x10000, MEM_READ_INTERNAL | writef);
else
mem_set_mem_state(0xf0000, 0x10000, MEM_READ_EXTANY | writef);
for (i = 0; i < 4; i++) {
base = 0xe0000 + (i << 14);
shflags = (dev->regs[0x24] & (1 << (i+4))) ? MEM_READ_INTERNAL : MEM_READ_EXTANY;
shflags |= (dev->regs[0x24] & (1 << (i))) ? write : MEM_WRITE_EXTANY;
write = (dev->regs[0x27] & 0x40) ? MEM_WRITE_DISABLED : MEM_WRITE_INTERNAL;
write = (dev->regs[0x24] & (1 << i)) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY;
shflags |= (dev->regs[0x27] & 0x40) ? MEM_WRITE_DISABLED : write;
mem_set_mem_state(base, 0x4000, shflags);
}
for (i = 0; i < 4; i++) {
base = 0xd0000 + (i << 14);
shflags = (dev->regs[0x25] & (1 << (i+4))) ? MEM_READ_INTERNAL : MEM_READ_EXTANY;
shflags |= (dev->regs[0x25] & (1 << (i))) ? write : MEM_WRITE_EXTANY;
write = (dev->regs[0x27] & 0x20) ? MEM_WRITE_DISABLED : MEM_WRITE_INTERNAL;
write = (dev->regs[0x25] & (1 << i)) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY;
shflags |= (dev->regs[0x27] & 0x20) ? MEM_WRITE_DISABLED : write;
mem_set_mem_state(base, 0x4000, shflags);
}
for (i = 0; i < 4; i++) {
base = 0xc0000 + (i << 14);
shflags = (dev->regs[0x26] & (1 << (i+4))) ? MEM_READ_INTERNAL : MEM_READ_EXTANY;
shflags |= (dev->regs[0x26] & (1 << i)) ? write : MEM_WRITE_EXTANY;
write = (dev->regs[0x27] & 0x10) ? MEM_WRITE_DISABLED : MEM_WRITE_INTERNAL;
write = (dev->regs[0x26] & (1 << i)) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY;
shflags |= (dev->regs[0x27] & 0x10) ? MEM_WRITE_DISABLED : write;
mem_set_mem_state(base, 0x4000, shflags);
}
flushmmucache();
@@ -83,6 +91,7 @@ opti291_write(uint16_t addr, uint8_t val, void *priv)
case 0x21:
cpu_update_waitstates();
break;
case 0x23:
case 0x24:
case 0x25:
case 0x26:
@@ -103,6 +112,7 @@ opti291_read(uint16_t addr, void *priv)
switch (addr) {
case 0x24:
// pclog("OPTi 291: read from dev->regs[%02x]\n", dev->index);
ret = dev->regs[dev->index];
break;
}
@@ -128,7 +138,8 @@ opti291_init(const device_t *info)
io_sethandler(0x022, 0x0001, opti291_read, NULL, NULL, opti291_write, NULL, NULL, dev);
io_sethandler(0x024, 0x0001, opti291_read, NULL, NULL, opti291_write, NULL, NULL, dev);
dev->regs[0x23] = 0x40;
dev->port_92 = device_add(&port_92_device);
opti291_recalc(dev);
return dev;

7
src/machine/machine_table.c
View File

@@ -171,9 +171,10 @@ const machine_t machines[] = {
{ "[NEAT] DTK 386SX clone", "dtk386", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT | MACHINE_HDC, 512, 8192, 128, 127, machine_at_neat_init, NULL },
{ "[NEAT] Goldstar 386", "goldstar386", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT | MACHINE_HDC, 512, 8192, 128, 127, machine_at_goldstar386_init, NULL },
{ "[SCAT] KMX-C-02", "kmxc02", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT, 512,16384, 512, 127, machine_at_kmxc02_init, NULL },
{ "[Intel 82335] Shuttle 386SX", "shuttle386sx", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT, 512, 8192, 128, 127, machine_at_shuttle386sx_init, NULL },
{ "[Intel 82335] ADI 386SX", "adi386sx", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT, 512, 8192, 128, 127, machine_at_adi386sx_init, NULL },
{ "[OPTi 291] DTK Award 386SX", "awardsx", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT | MACHINE_HDC, 512, 8192, 128, 127, machine_at_awardsx_init, NULL },
{ "[Intel 82335] Shuttle 386SX", "shuttle386sx", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT, 512, 8192, 128, 127, machine_at_shuttle386sx_init, NULL },
{ "[Intel 82335] ADI 386SX", "adi386sx", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT, 512, 8192, 128, 127, machine_at_adi386sx_init, NULL },
{ "[OPTi 291] DTK Award 386SX", "awardsx", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"", NULL}, {"", NULL}}, MACHINE_ISA | MACHINE_AT, 512, 8192, 128, 127, machine_at_awardsx_init, NULL },
/* 386SX machines which utilize the MCA bus */
{ "[MCA] IBM PS/2 model 55SX", "ibmps2_m55sx", MACHINE_TYPE_386SX, {{"Intel", cpus_i386SX}, {"AMD", cpus_Am386SX}, {"Cyrix", cpus_486SLC}, {"IBM",cpus_IBM486SLC},{"", NULL}}, MACHINE_MCA | MACHINE_AT | MACHINE_PS2 | MACHINE_VIDEO, 1, 8, 1, 63, machine_ps2_model_55sx_init, NULL },