Files
86Box/src/video/vid_paradise.c

721 lines
20 KiB
C

/*
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the 86Box distribution.
*
* Paradise VGA emulation
* PC2086, PC3086 use PVGA1A
* MegaPC uses W90C11A
*
*
*
* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
* Miran Grca, <mgrca8@gmail.com>
*
* Copyright 2008-2019 Sarah Walker.
* Copyright 2016-2019 Miran Grca.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <stdlib.h>
#include <wchar.h>
#include <86box/86box.h>
#include <86box/io.h>
#include <86box/timer.h>
#include <86box/mem.h>
#include <86box/rom.h>
#include <86box/device.h>
#include <86box/video.h>
#include <86box/vid_svga.h>
#include <86box/vid_svga_render.h>
typedef struct paradise_t
{
svga_t svga;
rom_t bios_rom;
uint8_t pr0a, pr0b, pr1, pr5, bank_mask;
enum
{
PVGA1A = 0,
WD90C11,
WD90C30
} type;
uint32_t vram_mask;
uint32_t read_bank[4], write_bank[4];
int interlace;
struct {
uint8_t reg_block_ptr;
uint8_t reg_idx;
uint8_t disable_autoinc;
uint16_t int_status;
uint16_t blt_ctrl1, blt_ctrl2;
uint16_t srclow, srchigh;
uint16_t dstlow, dsthigh;
uint32_t srcaddr, dstaddr;
int invalid_block;
} accel;
} paradise_t;
static video_timings_t timing_paradise_pvga1a = {VIDEO_ISA, 6, 8, 16, 6, 8, 16};
static video_timings_t timing_paradise_wd90c = {VIDEO_ISA, 3, 3, 6, 5, 5, 10};
void paradise_remap(paradise_t *paradise);
void paradise_out(uint16_t addr, uint8_t val, void *p)
{
paradise_t *paradise = (paradise_t *)p;
svga_t *svga = &paradise->svga;
uint8_t old, o;
if (paradise->vram_mask <= ((512 << 10) - 1))
paradise->bank_mask = 0x7f;
else
paradise->bank_mask = 0xff;
if (((addr & 0xfff0) == 0x3d0 || (addr & 0xfff0) == 0x3b0) && !(svga->miscout & 1))
addr ^= 0x60;
switch (addr)
{
case 0x3c5:
if (svga->seqaddr > 7)
{
if (paradise->type < WD90C11 || svga->seqregs[6] != 0x48)
return;
svga->seqregs[svga->seqaddr & 0x1f] = val;
if (svga->seqaddr == 0x11) {
paradise_remap(paradise);
}
return;
}
break;
case 0x3cf:
if (svga->gdcaddr >= 9 && svga->gdcaddr <= 0x0e) {
if ((paradise->pr5 & 7) != 5)
return;
}
switch (svga->gdcaddr) {
case 6:
if (val & 8)
svga->banked_mask = 0x7fff;
else
svga->banked_mask = 0xffff;
if (svga->gdcreg[6] != val)
svga->gdcreg[6] = val;
paradise_remap(paradise);
break;
case 9:
paradise->pr0a = val & paradise->bank_mask;
paradise_remap(paradise);
break;
case 0x0a:
paradise->pr0b = val & paradise->bank_mask;
paradise_remap(paradise);
break;
case 0x0b:
paradise->pr1 = val;
paradise_remap(paradise);
break;
case 0x0d:
o = svga->gdcreg[0x0d];
svga->gdcreg[0x0d] = val;
if ((o ^ val) & 0x18)
svga_recalctimings(svga);
break;
case 0x0e:
o = svga->gdcreg[0x0e];
svga->gdcreg[0x0e] = val;
if ((o ^ val) & 0x01)
svga_recalctimings(svga);
break;
case 0x0c:
svga->gdcreg[0x0c] = val;
break;
case 0x0f:
paradise->pr5 = val;
break;
default:
svga->gdcreg[svga->gdcaddr] = val;
break;
}
break;
case 0x3D4:
svga->crtcreg = val & 0x3f;
return;
case 0x3D5:
if ((paradise->type == PVGA1A) && (svga->crtcreg & 0x20))
return;
if ((svga->crtcreg < 7) && (svga->crtc[0x11] & 0x80))
return;
if ((svga->crtcreg == 7) && (svga->crtc[0x11] & 0x80))
val = (svga->crtc[7] & ~0x10) | (val & 0x10);
if (svga->crtcreg > 0x29 && (svga->crtc[0x29] & 7) != 5)
return;
if (svga->crtcreg >= 0x31 && svga->crtcreg <= 0x37)
return;
old = svga->crtc[svga->crtcreg];
svga->crtc[svga->crtcreg] = val;
if (old != val)
{
if (svga->crtcreg < 0xe || svga->crtcreg > 0x10)
{
if ((svga->crtcreg == 0xc) || (svga->crtcreg == 0xd)) {
svga->fullchange = 3;
svga->ma_latch = ((svga->crtc[0xc] << 8) | svga->crtc[0xd]) + ((svga->crtc[8] & 0x60) >> 5);
} else {
svga->fullchange = changeframecount;
svga_recalctimings(svga);
}
}
}
break;
}
svga_out(addr, val, svga);
}
uint8_t paradise_in(uint16_t addr, void *p)
{
paradise_t *paradise = (paradise_t *)p;
svga_t *svga = &paradise->svga;
if (((addr & 0xfff0) == 0x3d0 || (addr & 0xfff0) == 0x3b0) && !(svga->miscout & 1))
addr ^= 0x60;
switch (addr)
{
case 0x3c5:
if (svga->seqaddr > 7)
{
if (paradise->type < WD90C11 || svga->seqregs[6] != 0x48)
return 0xff;
if (paradise->type < WD90C30) {
if (svga->seqaddr > 0x12)
return 0xff;
}
return svga->seqregs[svga->seqaddr & 0x1f];
}
break;
case 0x3cf:
if (svga->gdcaddr >= 9 && svga->gdcaddr <= 0x0e) {
if ((paradise->pr5 & 7) != 5)
return 0xff;
}
switch (svga->gdcaddr) {
case 9:
return paradise->pr0a;
case 0x0a:
return paradise->pr0b;
case 0x0b:
if (paradise->vram_mask == (512 << 10) - 1) {
paradise->pr1 |= 0xc0;
paradise->pr1 &= ~0x40;
} else if (paradise->vram_mask == (1024 << 10) - 1) {
paradise->pr1 |= 0xc0;
if (svga->bpp >= 8 && !svga->lowres) /*Horrible tweak, but needed to get around black corruption in 1M mode*/
paradise->pr1 &= ~0x40;
}
return paradise->pr1;
case 6:
case 0x0c:
case 0x0d:
case 0x0e:
return svga->gdcreg[svga->gdcaddr];
case 0x0f:
return (paradise->pr5 & 0x17) | 0x80;
default:
return svga->gdcreg[svga->gdcaddr];
}
break;
case 0x3D4:
return svga->crtcreg;
case 0x3D5:
if ((paradise->type == PVGA1A) && (svga->crtcreg & 0x20))
return 0xff;
if (svga->crtcreg > 0x29 && svga->crtcreg < 0x30 && (svga->crtc[0x29] & 0x88) != 0x80)
return 0xff;
return svga->crtc[svga->crtcreg];
}
return svga_in(addr, svga);
}
void paradise_remap(paradise_t *paradise)
{
svga_t *svga = &paradise->svga;
if (svga->seqregs[0x11] & 0x80) {
paradise->read_bank[0] = (paradise->pr0a) << 12;
paradise->read_bank[1] = paradise->read_bank[0] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->read_bank[2] = paradise->read_bank[0];
paradise->read_bank[3] = paradise->read_bank[1];
paradise->write_bank[0] = (paradise->pr0b) << 12;
paradise->write_bank[1] = paradise->write_bank[0] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->write_bank[2] = paradise->write_bank[0];
paradise->write_bank[3] = paradise->write_bank[1];
} else if (paradise->pr1 & 8) {
if (svga->gdcreg[6] & 0x0c) {
paradise->read_bank[0] = (paradise->pr0b) << 12;
paradise->read_bank[1] = ((paradise->pr0a) << 12) + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->read_bank[2] = paradise->read_bank[0];
paradise->read_bank[3] = paradise->read_bank[1];
paradise->write_bank[0] = (paradise->pr0b) << 12;
paradise->write_bank[1] = ((paradise->pr0a) << 12) + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->write_bank[2] = paradise->write_bank[0];
paradise->write_bank[3] = paradise->write_bank[1];
} else {
paradise->read_bank[0] = (paradise->pr0b) << 12;
paradise->read_bank[1] = paradise->read_bank[0] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->read_bank[2] = (paradise->pr0a) << 12;
paradise->read_bank[3] = paradise->read_bank[2] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->write_bank[0] = (paradise->pr0b) << 12;
paradise->write_bank[1] = paradise->write_bank[0] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->write_bank[2] = (paradise->pr0a) << 12;
paradise->write_bank[3] = paradise->write_bank[2] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
}
} else {
paradise->read_bank[0] = (paradise->pr0a) << 12;
paradise->write_bank[0] = (paradise->pr0a) << 12;
paradise->read_bank[1] = paradise->read_bank[0] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->write_bank[1] = paradise->write_bank[0] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->read_bank[2] = paradise->read_bank[0];
paradise->write_bank[2] = paradise->write_bank[0];
paradise->read_bank[3] = paradise->read_bank[0] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
paradise->write_bank[3] = paradise->write_bank[0] + ((svga->gdcreg[6] & 8) ? 0 : 0x8000);
}
if (paradise->bank_mask == 0x7f) {
paradise->read_bank[1] &= 0x7ffff;
paradise->write_bank[1] &= 0x7ffff;
}
}
void paradise_recalctimings(svga_t *svga)
{
paradise_t *paradise = (paradise_t *) svga->p;
if (svga->gdcreg[0x0d] & 0x08) svga->ma_latch |= 0x10000;
if (svga->gdcreg[0x0d] & 0x10) svga->ma_latch |= 0x20000;
svga->lowres = !(svga->gdcreg[0x0e] & 0x01);
if (paradise->type == WD90C30) {
if (svga->crtc[0x3e] & 0x01) svga->vtotal |= 0x400;
if (svga->crtc[0x3e] & 0x02) svga->dispend |= 0x400;
if (svga->crtc[0x3e] & 0x04) svga->vsyncstart |= 0x400;
if (svga->crtc[0x3e] & 0x08) svga->vblankstart |= 0x400;
if (svga->crtc[0x3e] & 0x10) svga->split |= 0x400;
svga->interlace = !!(svga->crtc[0x2d] & 0x20);
if (!svga->interlace && svga->lowres && (svga->hdisp >= 1024) &&
((svga->gdcreg[5] & 0x60) == 0) && (svga->miscout >= 0x27) &&
(svga->miscout <= 0x2f) && ((svga->gdcreg[6] & 1) ||
(svga->attrregs[0x10] & 1))) { /*Horrible tweak to re-enable the interlace after returning to
a windowed DOS box in Win3.x*/
svga->interlace = 1;
}
}
if (svga->bpp >= 8 && !svga->lowres)
svga->render = svga_render_8bpp_highres;
}
static void paradise_write(uint32_t addr, uint8_t val, void *p)
{
paradise_t *paradise = (paradise_t *)p;
svga_t *svga = &paradise->svga;
addr &= svga->banked_mask;
addr = (addr & 0x7fff) + paradise->write_bank[(addr >> 15) & 3];
svga_write_linear(addr, val, svga);
}
static void paradise_writew(uint32_t addr, uint16_t val, void *p)
{
paradise_t *paradise = (paradise_t *)p;
svga_t *svga = &paradise->svga;
addr &= svga->banked_mask;
addr = (addr & 0x7fff) + paradise->write_bank[(addr >> 15) & 3];
svga_writew_linear(addr, val, svga);
}
static uint8_t paradise_read(uint32_t addr, void *p)
{
paradise_t *paradise = (paradise_t *)p;
svga_t *svga = &paradise->svga;
addr &= svga->banked_mask;
addr = (addr & 0x7fff) + paradise->read_bank[(addr >> 15) & 3];
return svga_read_linear(addr, svga);
}
static uint16_t paradise_readw(uint32_t addr, void *p)
{
paradise_t *paradise = (paradise_t *)p;
svga_t *svga = &paradise->svga;
addr &= svga->banked_mask;
addr = (addr & 0x7fff) + paradise->read_bank[(addr >> 15) & 3];
return svga_readw_linear(addr, svga);
}
void *paradise_init(const device_t *info, uint32_t memsize)
{
paradise_t *paradise = malloc(sizeof(paradise_t));
svga_t *svga = &paradise->svga;
memset(paradise, 0, sizeof(paradise_t));
if (info->local == PVGA1A)
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_paradise_pvga1a);
else
video_inform(VIDEO_FLAG_TYPE_SPECIAL, &timing_paradise_wd90c);
switch(info->local) {
case PVGA1A:
svga_init(info, svga, paradise, memsize, /*256kb*/
paradise_recalctimings,
paradise_in, paradise_out,
NULL,
NULL);
paradise->vram_mask = memsize - 1;
svga->decode_mask = memsize - 1;
break;
case WD90C11:
svga_init(info, svga, paradise, 1 << 19, /*512kb*/
paradise_recalctimings,
paradise_in, paradise_out,
NULL,
NULL);
paradise->vram_mask = (1 << 19) - 1;
svga->decode_mask = (1 << 19) - 1;
break;
case WD90C30:
svga_init(info, svga, paradise, memsize,
paradise_recalctimings,
paradise_in, paradise_out,
NULL,
NULL);
paradise->vram_mask = memsize - 1;
svga->decode_mask = memsize - 1;
break;
}
mem_mapping_set_handler(&svga->mapping, paradise_read, paradise_readw, NULL, paradise_write, paradise_writew, NULL);
mem_mapping_set_p(&svga->mapping, paradise);
io_sethandler(0x03c0, 0x0020, paradise_in, NULL, NULL, paradise_out, NULL, NULL, paradise);
/* Common to all three types. */
svga->crtc[0x31] = 'W';
svga->crtc[0x32] = 'D';
svga->crtc[0x33] = '9';
svga->crtc[0x34] = '0';
svga->crtc[0x35] = 'C';
switch(info->local) {
case WD90C11:
svga->crtc[0x36] = '1';
svga->crtc[0x37] = '1';
break;
case WD90C30:
svga->crtc[0x36] = '3';
svga->crtc[0x37] = '0';
break;
}
svga->bpp = 8;
svga->miscout = 1;
paradise->type = info->local;
return paradise;
}
static void *paradise_pvga1a_ncr3302_init(const device_t *info)
{
paradise_t *paradise = paradise_init(info, 1 << 18);
if (paradise)
rom_init(&paradise->bios_rom, "roms/machines/ncr_3302/c000-wd_1987-1989-740011-003058-019c.bin", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
return paradise;
}
static void *paradise_pvga1a_pc2086_init(const device_t *info)
{
paradise_t *paradise = paradise_init(info, 1 << 18);
if (paradise)
rom_init(&paradise->bios_rom, "roms/machines/pc2086/40186.ic171", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
return paradise;
}
static void *paradise_pvga1a_pc3086_init(const device_t *info)
{
paradise_t *paradise = paradise_init(info, 1 << 18);
if (paradise)
rom_init(&paradise->bios_rom, "roms/machines/pc3086/c000.bin", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
return paradise;
}
static void *paradise_pvga1a_standalone_init(const device_t *info)
{
paradise_t *paradise;
uint32_t memory = 512;
memory = device_get_config_int("memory");
memory <<= 10;
paradise = paradise_init(info, memory);
if (paradise)
rom_init(&paradise->bios_rom, "roms/video/pvga1a/BIOS.BIN", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
return paradise;
}
static int paradise_pvga1a_standalone_available(void)
{
return rom_present("roms/video/pvga1a/BIOS.BIN");
}
static void *paradise_wd90c11_megapc_init(const device_t *info)
{
paradise_t *paradise = paradise_init(info, 0);
if (paradise)
rom_init_interleaved(&paradise->bios_rom,
"roms/machines/megapc/41651-bios lo.u18",
"roms/machines/megapc/211253-bios hi.u19",
0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
return paradise;
}
static void *paradise_wd90c11_standalone_init(const device_t *info)
{
paradise_t *paradise = paradise_init(info, 0);
if (paradise)
rom_init(&paradise->bios_rom, "roms/video/wd90c11/WD90C11.VBI", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
return paradise;
}
static int paradise_wd90c11_standalone_available(void)
{
return rom_present("roms/video/wd90c11/WD90C11.VBI");
}
static void *paradise_wd90c30_standalone_init(const device_t *info)
{
paradise_t *paradise;
uint32_t memory = 512;
memory = device_get_config_int("memory");
memory <<= 10;
paradise = paradise_init(info, memory);
if (paradise)
rom_init(&paradise->bios_rom, "roms/video/wd90c30/90C30-LR.VBI", 0xc0000, 0x8000, 0x7fff, 0, MEM_MAPPING_EXTERNAL);
return paradise;
}
static int paradise_wd90c30_standalone_available(void)
{
return rom_present("roms/video/wd90c30/90C30-LR.VBI");
}
void paradise_close(void *p)
{
paradise_t *paradise = (paradise_t *)p;
svga_close(&paradise->svga);
free(paradise);
}
void paradise_speed_changed(void *p)
{
paradise_t *paradise = (paradise_t *)p;
svga_recalctimings(&paradise->svga);
}
void paradise_force_redraw(void *p)
{
paradise_t *paradise = (paradise_t *)p;
paradise->svga.fullchange = changeframecount;
}
const device_t paradise_pvga1a_pc2086_device =
{
"Paradise PVGA1A (Amstrad PC2086)",
0,
PVGA1A,
paradise_pvga1a_pc2086_init,
paradise_close,
NULL,
{ NULL },
paradise_speed_changed,
paradise_force_redraw,
NULL
};
const device_t paradise_pvga1a_pc3086_device =
{
"Paradise PVGA1A (Amstrad PC3086)",
0,
PVGA1A,
paradise_pvga1a_pc3086_init,
paradise_close,
NULL,
{ NULL },
paradise_speed_changed,
paradise_force_redraw,
NULL
};
static const device_config_t paradise_pvga1a_config[] =
{
{
"memory", "Memory size", CONFIG_SELECTION, "", 512, "", { 0 },
{
{
"256 kB", 256
},
{
"512 kB", 512
},
{
"1 MB", 1024
},
{
""
}
}
},
{
"", "", -1
}
};
const device_t paradise_pvga1a_ncr3302_device =
{
"Paradise PVGA1A (NCR 3302)",
0,
PVGA1A,
paradise_pvga1a_ncr3302_init,
paradise_close,
NULL,
{ NULL },
paradise_speed_changed,
paradise_force_redraw,
paradise_pvga1a_config
};
const device_t paradise_pvga1a_device =
{
"Paradise PVGA1A",
DEVICE_ISA,
PVGA1A,
paradise_pvga1a_standalone_init,
paradise_close,
NULL,
{ paradise_pvga1a_standalone_available },
paradise_speed_changed,
paradise_force_redraw,
paradise_pvga1a_config
};
const device_t paradise_wd90c11_megapc_device =
{
"Paradise WD90C11 (Amstrad MegaPC)",
0,
WD90C11,
paradise_wd90c11_megapc_init,
paradise_close,
NULL,
{ NULL },
paradise_speed_changed,
paradise_force_redraw,
NULL
};
const device_t paradise_wd90c11_device =
{
"Paradise WD90C11-LR",
DEVICE_ISA,
WD90C11,
paradise_wd90c11_standalone_init,
paradise_close,
NULL,
{ paradise_wd90c11_standalone_available },
paradise_speed_changed,
paradise_force_redraw,
NULL
};
static const device_config_t paradise_wd90c30_config[] =
{
{
"memory", "Memory size", CONFIG_SELECTION, "", 1024, "", { 0 },
{
{
"512 kB", 512
},
{
"1 MB", 1024
},
{
""
}
}
},
{
"", "", -1
}
};
const device_t paradise_wd90c30_device =
{
"Paradise WD90C30-LR",
DEVICE_ISA,
WD90C30,
paradise_wd90c30_standalone_init,
paradise_close,
NULL,
{ paradise_wd90c30_standalone_available },
paradise_speed_changed,
paradise_force_redraw,
paradise_wd90c30_config
};