80486DX2-66/86Box-fork
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Cleanup of the XGA mapping to be less messed up.

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As well as the cursor/sprite being finally fixed when the xoff goes from 0x20 onwards. This makes Win3.x' XGA cursor look normal and everything else as well. (as in, intact).
This commit is contained in:
TC1995
2024-04-26 22:52:58 +02:00
parent 9c2d0ab545
commit 738446fea6
1 changed files with 81 additions and 76 deletions
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157
src/video/vid_xga.c
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@@ -151,37 +151,50 @@ xga_updatemapping(svga_t *svga)
xga->aperture_cntl, xga->access_mode, svga->gdcreg[6] & 0x0c,
xga->linear_endian_reverse, xga->a5_test, xga->on);
if (((xga->op_mode & 7) >= 4) || ((xga->op_mode & 7) == 0)) {
if ((xga->aperture_cntl == 1) || (xga->aperture_cntl == 2)) {
if (xga->aperture_cntl == 1)
mem_mapping_set_addr(&xga->video_mapping, 0xa0000, 0x10000);
else
mem_mapping_set_addr(&xga->video_mapping, 0xb0000, 0x10000);
switch (xga->op_mode & 7) {
case 0:
xga_log("XGA: VGA mode address decode disabled.\n");
break;
case 1:
xga_log("XGA: VGA mode address decode enabled.\n");
break;
case 2:
xga_log("XGA: 132-Column mode address decode disabled.\n");
break;
case 3:
xga_log("XGA: 132-Column mode address decode enabled.\n");
break;
default:
xga_log("XGA: Extended Graphics mode.\n");
switch (xga->aperture_cntl) {
case 0:
xga_log("XGA: No 64KB aperture.\n");
if (xga->base_addr_1mb)
mem_mapping_set_addr(&xga->linear_mapping, xga->base_addr_1mb, 0x100000);
else if (xga->linear_base)
mem_mapping_set_addr(&xga->linear_mapping, xga->linear_base, 0x400000);
else
mem_mapping_disable(&xga->linear_mapping);
mem_mapping_enable(&xga->video_mapping);
xga->banked_mask = 0xffff;
if (!xga->linear_endian_reverse)
mem_mapping_disable(&xga->linear_mapping);
} else if (xga->aperture_cntl == 0) {
mem_mapping_set_addr(&xga->video_mapping, 0xa0000, 0x10000);
mem_mapping_enable(&xga->video_mapping);
xga->banked_mask = 0xffff;
if (xga->base_addr_1mb)
mem_mapping_set_addr(&xga->linear_mapping, xga->base_addr_1mb, 0x100000);
else
mem_mapping_set_addr(&xga->linear_mapping, xga->linear_base, 0x400000);
if (xga->a5_test && (xga->access_mode & 8) && !xga->linear_endian_reverse) {
xga->on = 0;
vga_on = 1;
xga_log("A5 test valid.\n");
mem_mapping_disable(&xga->video_mapping);
break;
case 1:
xga_log("XGA: 64KB aperture at A0000.\n");
mem_mapping_set_addr(&xga->video_mapping, 0xa0000, 0x10000);
mem_mapping_enable(&xga->video_mapping);
xga->banked_mask = 0xffff;
break;
case 2:
xga_log("XGA: 64KB aperture at B0000.\n");
mem_mapping_set_addr(&xga->video_mapping, 0xb0000, 0x10000);
mem_mapping_enable(&xga->video_mapping);
xga->banked_mask = 0xffff;
break;
default:
break;
}
}
xga_log("XGA opmode (extended) = %d, disp mode = %d, aperture = %d, on = %d, linear endian reverse = %d.\n", xga->op_mode & 7,
xga->disp_cntl_2 & 7, xga->aperture_cntl, xga->on, xga->linear_endian_reverse);
break;
}
xga_log("VGA on = %d, map = %02x.\n", vga_on, svga->gdcreg[6] & 0x0c);
}
void
@@ -410,28 +423,6 @@ xga_ext_out_reg(xga_t *xga, svga_t *svga, uint8_t idx, uint8_t val)
case 0x61:
xga->sprite_pal_addr_idx = (xga->sprite_pal_addr_idx & 0xff) | ((val & 0x3f) << 8);
xga->sprite_pos = xga->sprite_pal_addr_idx & 0x1ff;
if ((xga->sprite_pos >= 0) && (xga->sprite_pos <= 16)) {
if ((xga->op_mode & 7) >= 5)
xga->cursor_data_on = 1;
else if ((xga->sprite_pos >= 1) || (((xga->disp_cntl_2 & 7) == 2) || (xga->disp_cntl_2 & 7) == 4))
xga->cursor_data_on = 1;
else if (!xga->aperture_cntl) {
if (xga->linear_endian_reverse && !(xga->access_mode & 8))
xga->cursor_data_on = 0;
}
}
if ((xga->sprite_pos > 16) && (xga->sprite_pos <= 0x1ff)) {
if (xga->aperture_cntl) {
if (xga->sprite_pos & 0x0f)
xga->cursor_data_on = 1;
else
xga->cursor_data_on = 0;
} else
xga->cursor_data_on = 0;
} else if (!xga->sprite_pos && xga->cursor_data_on && !xga->aperture_cntl && xga->linear_endian_reverse)
xga->cursor_data_on = 0;
xga_log("Sprite POS = %d, data on = %d, idx = %d, apcntl = %d\n", xga->sprite_pos,
xga->cursor_data_on, xga->sprite_pal_addr_idx, xga->aperture_cntl);
@@ -515,13 +506,12 @@ xga_ext_outb(uint16_t addr, uint8_t val, void *priv)
xga_t *xga = (xga_t *) svga->xga;
xga_log("[%04X:%08X]: EXT OUTB = %02x, val = %02x\n", CS, cpu_state.pc, addr, val);
switch (addr & 0x0f) {
case 0:
xga->op_mode = val;
break;
case 1:
xga->aperture_cntl = val;
xga->aperture_cntl = val & 3;
xga_updatemapping(svga);
break;
case 4:
@@ -561,6 +551,7 @@ xga_ext_outb(uint16_t addr, uint8_t val, void *priv)
case 0x0e:
case 0x0f:
xga->regs[xga->regs_idx] = val;
xga_log("EXT OUT Reg=%02x, val=%02x.\n", xga->regs_idx, val);
xga_ext_out_reg(xga, svga, xga->regs_idx, xga->regs[xga->regs_idx]);
break;
@@ -801,6 +792,8 @@ xga_ext_inb(uint16_t addr, void *priv)
default:
ret = xga->regs[xga->regs_idx];
if ((xga->regs_idx == 0x0c) || (xga->regs_idx == 0x0d))
xga_log("EXT IN Reg=%02x, val=%02x.\n", xga->regs_idx, ret);
break;
}
break;
@@ -1760,6 +1753,7 @@ xga_mem_write(uint32_t addr, uint32_t val, xga_t *xga, svga_t *svga, int len)
switch (addr & 0x7f) {
case 0x11:
xga->accel.control = val;
xga_log("Control=%02x.\n", val);
break;
case 0x12:
@@ -2303,6 +2297,12 @@ xga_mem_read(uint32_t addr, xga_t *xga, UNUSED(svga_t *svga))
temp = xga->vga_bios_rom.rom[addr];
} else {
switch (addr & 0x7f) {
case 0x0c:
temp = xga->regs[0x0c];
break;
case 0x0d:
temp = xga->regs[0x0d];
break;
case 0x11:
temp = xga->accel.control;
if (xga->accel.control & 0x08)
@@ -2423,42 +2423,45 @@ xga_memio_readl(uint32_t addr, void *priv)
static void
xga_hwcursor_draw(svga_t *svga, int displine)
{
xga_t *xga = (xga_t *) svga->xga;
uint8_t dat = 0;
int offset = xga->hwcursor_latch.x - xga->hwcursor_latch.xoff;
int x_pos;
int y_pos;
int comb = 0;
uint32_t *p;
int idx = xga->cursor_data_on ? 32 : 0;
xga_t *xga = (xga_t *) svga->xga;
int comb;
uint8_t dat = 0;
int offset = xga->hwcursor_latch.x - xga->hwcursor_latch.xoff;
int idx = 0;
int x_pos;
int y_pos;
uint32_t *p;
const uint8_t *cd;
if (xga->hwcursor_latch.xoff & 0x20)
idx = 32;
cd = (uint8_t *) xga->sprite_data;
if (xga->interlace && xga->hwcursor_oddeven)
xga->hwcursor_latch.addr += 16;
y_pos = displine;
x_pos = offset + svga->x_add;
p = buffer32->line[y_pos];
for (uint8_t x = 0; x < xga->hwcursor_latch.cur_xsize; x++) {
dat = cd[xga->hwcursor_latch.addr & 0x3ff];
comb = (dat >> ((x & 0x03) << 1)) & 0x03;
y_pos = displine;
x_pos = offset + svga->x_add;
p = buffer32->line[y_pos];
for (int x = 0; x < xga->hwcursor_latch.cur_xsize; x++) {
if (x >= idx) {
if (!(x & 0x03))
dat = xga->sprite_data[xga->hwcursor_latch.addr & 0x3ff];
comb = (dat >> ((x & 0x03) << 1)) & 0x03;
x_pos = offset + svga->x_add + x;
switch (comb) {
case 0x00:
/* Cursor Color 1 */
/* Cursor Color 1 */
p[x_pos] = xga->hwc_color0;
break;
case 0x01:
/* Cursor Color 2 */
/* Cursor Color 2 */
p[x_pos] = xga->hwc_color1;
break;
case 0x03:
/* Complement */
/* Complement */
p[x_pos] ^= 0xffffff;
break;
@@ -2466,6 +2469,8 @@ xga_hwcursor_draw(svga_t *svga, int displine)
break;
}
}
offset++;
xga_log("P=%08x, xpos=%d, comb=%x, ypos=%d, offset=%d, latchx=%d, latchxoff=%d.\n", p[x_pos], x_pos, comb, y_pos, offset, xga->hwcursor_latch.x, xga->hwcursor_latch.xoff);
if ((x & 0x03) == 0x03)
xga->hwcursor_latch.addr++;
@@ -2927,12 +2932,12 @@ xga_poll(void *priv, svga_t *svga)
if (!xga->linepos) {
if (xga->displine == xga->hwcursor_latch.y && xga->hwcursor_latch.ena) {
xga->hwcursor_on = xga->hwcursor_latch.cur_ysize - (xga->cursor_data_on ? 32 : 0);
xga->hwcursor_on = xga->hwcursor_latch.cur_ysize;
xga->hwcursor_oddeven = 0;
}
if (xga->displine == (xga->hwcursor_latch.y + 1) && xga->hwcursor_latch.ena && xga->interlace) {
xga->hwcursor_on = xga->hwcursor_latch.cur_ysize - (xga->cursor_data_on ? 33 : 1);
xga->hwcursor_on = xga->hwcursor_latch.cur_ysize - 1;
xga->hwcursor_oddeven = 1;
}