Add Trident TVGA9000B emulation.
This commit is contained in:
SarahW
parent
7d4bc7237c
commit
264cfc3a12
4 changed files with 95 additions and 20 deletions
112
src/vid_tvga.c
112
src/vid_tvga.c
|
|
@ -11,6 +11,12 @@
|
|||
#include "vid_tkd8001_ramdac.h"
|
||||
#include "vid_tvga.h"
|
||||
|
||||
enum
|
||||
{
|
||||
TVGA_8900D = 0x33,
|
||||
TVGA_9000 = 0x23
|
||||
};
|
||||
|
||||
typedef struct tvga_t
|
||||
{
|
||||
mem_mapping_t linear_mapping;
|
||||
|
|
@ -28,6 +34,8 @@ typedef struct tvga_t
|
|||
|
||||
int vram_size;
|
||||
uint32_t vram_mask;
|
||||
|
||||
uint8_t id;
|
||||
} tvga_t;
|
||||
|
||||
static uint8_t crtc_mask[0x40] =
|
||||
|
|
@ -67,7 +75,7 @@ void tvga_out(uint16_t addr, uint8_t val, void *p)
|
|||
break;
|
||||
case 0xd:
|
||||
if (tvga->oldmode)
|
||||
tvga->oldctrl2 = val;
|
||||
tvga->oldctrl2 = val;
|
||||
else
|
||||
{
|
||||
tvga->newctrl2 = val;
|
||||
|
|
@ -76,7 +84,10 @@ void tvga_out(uint16_t addr, uint8_t val, void *p)
|
|||
break;
|
||||
case 0xE:
|
||||
if (tvga->oldmode)
|
||||
{
|
||||
tvga->oldctrl1 = val;
|
||||
svga_recalctimings(svga);
|
||||
}
|
||||
else
|
||||
{
|
||||
svga->seqregs[0xe] = val ^ 2;
|
||||
|
|
@ -88,8 +99,12 @@ void tvga_out(uint16_t addr, uint8_t val, void *p)
|
|||
break;
|
||||
|
||||
case 0x3C6: case 0x3C7: case 0x3C8: case 0x3C9:
|
||||
tkd8001_ramdac_out(addr, val, &tvga->ramdac, svga);
|
||||
return;
|
||||
if (tvga->id != TVGA_9000)
|
||||
{
|
||||
tkd8001_ramdac_out(addr, val, &tvga->ramdac, svga);
|
||||
return;
|
||||
}
|
||||
break;
|
||||
|
||||
case 0x3CF:
|
||||
switch (svga->gdcaddr & 15)
|
||||
|
|
@ -166,7 +181,7 @@ uint8_t tvga_in(uint16_t addr, void *p)
|
|||
{
|
||||
// printf("Read Trident ID %04X:%04X %04X\n",CS,pc,readmemw(ss,SP));
|
||||
tvga->oldmode = 0;
|
||||
return 0x33; /*TVGA8900D*/
|
||||
return tvga->id;
|
||||
}
|
||||
if ((svga->seqaddr & 0xf) == 0xc)
|
||||
{
|
||||
|
|
@ -185,7 +200,9 @@ uint8_t tvga_in(uint16_t addr, void *p)
|
|||
}
|
||||
break;
|
||||
case 0x3C6: case 0x3C7: case 0x3C8: case 0x3C9:
|
||||
return tkd8001_ramdac_in(addr, &tvga->ramdac, svga);
|
||||
if (tvga->id != TVGA_9000)
|
||||
return tkd8001_ramdac_in(addr, &tvga->ramdac, svga);
|
||||
break;
|
||||
case 0x3D4:
|
||||
return svga->crtcreg;
|
||||
case 0x3D5:
|
||||
|
|
@ -217,6 +234,9 @@ static void tvga_recalcbanking(tvga_t *tvga)
|
|||
void tvga_recalctimings(svga_t *svga)
|
||||
{
|
||||
tvga_t *tvga = (tvga_t *)svga->p;
|
||||
int clksel;
|
||||
int high_res_256 = 0;
|
||||
|
||||
if (!svga->rowoffset) svga->rowoffset = 0x100; /*This is the only sensible way I can see this being handled,
|
||||
given that TVGA8900D has no overflow bits.
|
||||
Some sort of overflow is required for 320x200x24 and 1024x768x16*/
|
||||
|
|
@ -246,18 +266,43 @@ void tvga_recalctimings(svga_t *svga)
|
|||
if (svga->interlace)
|
||||
svga->rowoffset >>= 1;
|
||||
|
||||
switch (((svga->miscout >> 2) & 3) | ((tvga->newctrl2 << 2) & 4))
|
||||
if (tvga->id == TVGA_8900D)
|
||||
clksel = ((svga->miscout >> 2) & 3) | ((tvga->newctrl2 & 0x01) << 2) | ((tvga->oldctrl1 & 0x10) >> 1);
|
||||
else
|
||||
clksel = ((svga->miscout >> 2) & 3) | ((tvga->newctrl2 & 0x01) << 2) | ((tvga->newctrl2 & 0x40) >> 3);
|
||||
switch (clksel)
|
||||
{
|
||||
case 2: svga->clock = (cpuclock * (double)(1ull << 32)) / 44900000.0; break;
|
||||
case 3: svga->clock = (cpuclock * (double)(1ull << 32)) / 36000000.0; break;
|
||||
case 4: svga->clock = (cpuclock * (double)(1ull << 32)) / 57272000.0; break;
|
||||
case 5: svga->clock = (cpuclock * (double)(1ull << 32)) / 65000000.0; break;
|
||||
case 6: svga->clock = (cpuclock * (double)(1ull << 32)) / 50350000.0; break;
|
||||
case 7: svga->clock = (cpuclock * (double)(1ull << 32)) / 40000000.0; break;
|
||||
case 0x2: svga->clock = (cpuclock * (double)(1ull << 32)) / 44900000.0; break;
|
||||
case 0x3: svga->clock = (cpuclock * (double)(1ull << 32)) / 36000000.0; break;
|
||||
case 0x4: svga->clock = (cpuclock * (double)(1ull << 32)) / 57272000.0; break;
|
||||
case 0x5: svga->clock = (cpuclock * (double)(1ull << 32)) / 65000000.0; break;
|
||||
case 0x6: svga->clock = (cpuclock * (double)(1ull << 32)) / 50350000.0; break;
|
||||
case 0x7: svga->clock = (cpuclock * (double)(1ull << 32)) / 40000000.0; break;
|
||||
case 0x8: svga->clock = (cpuclock * (double)(1ull << 32)) / 88000000.0; break;
|
||||
case 0x9: svga->clock = (cpuclock * (double)(1ull << 32)) / 98000000.0; break;
|
||||
case 0xa: svga->clock = (cpuclock * (double)(1ull << 32)) / 118800000.0; break;
|
||||
case 0xb: svga->clock = (cpuclock * (double)(1ull << 32)) / 108000000.0; break;
|
||||
case 0xc: svga->clock = (cpuclock * (double)(1ull << 32)) / 72000000.0; break;
|
||||
case 0xd: svga->clock = (cpuclock * (double)(1ull << 32)) / 77000000.0; break;
|
||||
case 0xe: svga->clock = (cpuclock * (double)(1ull << 32)) / 80000000.0; break;
|
||||
case 0xf: svga->clock = (cpuclock * (double)(1ull << 32)) / 75000000.0; break;
|
||||
}
|
||||
|
||||
if (tvga->oldctrl2 & 0x10)
|
||||
if (tvga->id == TVGA_9000)
|
||||
{
|
||||
/*TVGA9000 doesn't seem to have support for a 'high res' 256 colour mode
|
||||
(without the VGA pixel doubling). Instead it implements these modes by
|
||||
doubling the horizontal pixel count and pixel clock. Hence we use a
|
||||
basic heuristic to detect this*/
|
||||
if (svga->interlace)
|
||||
high_res_256 = (svga->htotal * 8) > (svga->vtotal * 4);
|
||||
else
|
||||
high_res_256 = (svga->htotal * 8) > (svga->vtotal * 2);
|
||||
}
|
||||
if ((tvga->oldctrl2 & 0x10) || high_res_256)
|
||||
{
|
||||
if (high_res_256)
|
||||
svga->hdisp /= 2;
|
||||
switch (svga->bpp)
|
||||
{
|
||||
case 8:
|
||||
|
|
@ -280,31 +325,46 @@ void tvga_recalctimings(svga_t *svga)
|
|||
}
|
||||
}
|
||||
|
||||
void *tvga8900d_init()
|
||||
static void *tvga_common_init(char *fn, uint32_t id, int vram_size)
|
||||
{
|
||||
tvga_t *tvga = malloc(sizeof(tvga_t));
|
||||
memset(tvga, 0, sizeof(tvga_t));
|
||||
|
||||
tvga->vram_size = device_get_config_int("memory") << 10;
|
||||
|
||||
tvga->vram_size = vram_size << 10;
|
||||
tvga->vram_mask = tvga->vram_size - 1;
|
||||
|
||||
rom_init(&tvga->bios_rom, "trident.bin", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
|
||||
|
||||
tvga->id = id;
|
||||
|
||||
rom_init(&tvga->bios_rom, fn, 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
|
||||
|
||||
svga_init(&tvga->svga, tvga, tvga->vram_size,
|
||||
tvga_recalctimings,
|
||||
tvga_in, tvga_out,
|
||||
NULL,
|
||||
NULL);
|
||||
|
||||
|
||||
io_sethandler(0x03c0, 0x0020, tvga_in, NULL, NULL, tvga_out, NULL, NULL, tvga);
|
||||
|
||||
return tvga;
|
||||
}
|
||||
static void *tvga8900d_init()
|
||||
{
|
||||
int vram_size = device_get_config_int("memory");
|
||||
|
||||
return tvga_common_init("trident.bin", TVGA_8900D, vram_size);
|
||||
}
|
||||
static void *tvga9000b_init()
|
||||
{
|
||||
return tvga_common_init("tvga9000b/BIOS.BIN", TVGA_9000, 512);
|
||||
}
|
||||
|
||||
static int tvga8900d_available()
|
||||
{
|
||||
return rom_present("trident.bin");
|
||||
}
|
||||
static int tvga9000b_available()
|
||||
{
|
||||
return rom_present("tvga9000b/BIOS.BIN");
|
||||
}
|
||||
|
||||
void tvga_close(void *p)
|
||||
{
|
||||
|
|
@ -380,3 +440,15 @@ device_t tvga8900d_device =
|
|||
tvga_add_status_info,
|
||||
tvga_config
|
||||
};
|
||||
device_t tvga9000b_device =
|
||||
{
|
||||
"Trident TVGA 9000B",
|
||||
0,
|
||||
tvga9000b_init,
|
||||
tvga_close,
|
||||
tvga9000b_available,
|
||||
tvga_speed_changed,
|
||||
tvga_force_redraw,
|
||||
tvga_add_status_info,
|
||||
NULL
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in a new issue