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Fixed IBM RGB28 RAMDAC hardware cursor position calculation.

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This commit is contained in:
OBattler
2021-08-25 13:58:01 +02:00
parent c99c629e0e
commit 4ad78598ea
1 changed files with 29 additions and 20 deletions
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49
src/video/vid_ibm_rgb528_ramdac.c
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@@ -60,7 +60,7 @@ typedef struct
uint8_t cursor64_data[1024];
uint8_t palettes[3][256];
ibm_rgb528_pixel32_t extra_pal[4];
int hwc_y, hwc_x;
int16_t hwc_y, hwc_x;
uint16_t index, smlc_part;
uint8_t cmd_r0;
uint8_t cmd_r1;
@@ -68,7 +68,8 @@ typedef struct
uint8_t cmd_r3;
uint8_t cmd_r4;
uint8_t status, indx_cntl;
uint8_t cursor_array;
uint8_t cursor_array,
cursor_hotspot_x, cursor_hotspot_y;
} ibm_rgb528_ramdac_t;
@@ -641,7 +642,8 @@ ibm_rgb528_ramdac_out(uint16_t addr, int rs2, uint8_t val, void *p, svga_t *svga
case 0x031:
if (!updt_cntl)
break;
svga->dac_hwcursor.x = (svga->dac_hwcursor.x & 0xff00) | val;
ramdac->hwc_x = (ramdac->hwc_x & 0xff00) | val;
svga->dac_hwcursor.x = ((int) ramdac->hwc_x) - ramdac->cursor_hotspot_x;
break;
case 0x032:
/* Sign-extend the sign bit (7) to the remaining bits (6-4). */
@@ -651,12 +653,14 @@ ibm_rgb528_ramdac_out(uint16_t addr, int rs2, uint8_t val, void *p, svga_t *svga
ramdac->indexed_data[ramdac->index] = val;
if (!updt_cntl)
break;
svga->dac_hwcursor.x = (svga->dac_hwcursor.x & 0x00ff) | (val << 8);
ramdac->hwc_x = (ramdac->hwc_x & 0x00ff) | (val << 8);
svga->dac_hwcursor.x = ((int) ramdac->hwc_x) - ramdac->cursor_hotspot_x;
break;
case 0x033:
if (!updt_cntl)
break;
svga->dac_hwcursor.y = (svga->dac_hwcursor.y & 0xff00) | val;
ramdac->hwc_y = (ramdac->hwc_y & 0xff00) | val;
svga->dac_hwcursor.y = ((int) ramdac->hwc_y) - ramdac->cursor_hotspot_y;
break;
case 0x034:
/* Sign-extend the sign bit (7) to the remaining bits (6-4). */
@@ -664,26 +668,31 @@ ibm_rgb528_ramdac_out(uint16_t addr, int rs2, uint8_t val, void *p, svga_t *svga
if (val & 0x80)
val |= 0x70;
ramdac->indexed_data[ramdac->index] = val;
if (updt_cntl)
svga->dac_hwcursor.y = (svga->dac_hwcursor.y & 0x00ff) | (val << 8);
else {
svga->dac_hwcursor.x = ramdac->indexed_data[0x031];
svga->dac_hwcursor.x |= (ramdac->indexed_data[0x032] << 8);
svga->dac_hwcursor.y = ramdac->indexed_data[0x033];
svga->dac_hwcursor.y |= (val << 8);
if (updt_cntl) {
ramdac->hwc_y = (ramdac->hwc_y & 0x00ff) | (val << 8);
svga->dac_hwcursor.y = ((int) ramdac->hwc_y) - ramdac->cursor_hotspot_y;
} else {
ramdac->hwc_x = ramdac->indexed_data[0x031];
ramdac->hwc_x |= (ramdac->indexed_data[0x032] << 8);
ramdac->hwc_y = ramdac->indexed_data[0x033];
ramdac->hwc_y |= (val << 8);
svga->dac_hwcursor.x = ((int) ramdac->hwc_x) - ramdac->cursor_hotspot_x;
svga->dac_hwcursor.y = ((int) ramdac->hwc_y) - ramdac->cursor_hotspot_y;
}
break;
case 0x035:
if (svga->dac_hwcursor.xsize == 64)
svga->dac_hwcursor.xoff = (val & 0x1f);
ramdac->cursor_hotspot_x = (val & 0x3f);
else
svga->dac_hwcursor.xoff = (val & 0x3f);
ramdac->cursor_hotspot_x = (val & 0x1f);
svga->dac_hwcursor.x = ((int) ramdac->hwc_x) - ramdac->cursor_hotspot_x;
break;
case 0x036:
if (svga->dac_hwcursor.xsize == 64)
svga->dac_hwcursor.yoff = (val & 0x1f);
ramdac->cursor_hotspot_y = (val & 0x3f);
else
svga->dac_hwcursor.yoff = (val & 0x3f);
ramdac->cursor_hotspot_y = (val & 0x1f);
svga->dac_hwcursor.y = ((int) ramdac->hwc_y) - ramdac->cursor_hotspot_y;
break;
case 0x040: case 0x043: case 0x046:
ramdac->extra_pal[(ramdac->index - 0x40) / 3].r = val;
@@ -762,19 +771,19 @@ ibm_rgb528_ramdac_in(uint16_t addr, int rs2, void *p, svga_t *svga)
break;
case 0x0031:
if (loc_read)
temp = svga->dac_hwcursor.x & 0xff;
temp = ramdac->hwc_x & 0xff;
break;
case 0x0032:
if (loc_read)
temp = svga->dac_hwcursor.x >> 8;
temp = ramdac->hwc_x >> 8;
break;
case 0x0033:
if (loc_read)
temp = svga->dac_hwcursor.y & 0xff;
temp = ramdac->hwc_y & 0xff;
break;
case 0x0034:
if (loc_read)
temp = svga->dac_hwcursor.y >> 8;
temp = ramdac->hwc_y >> 8;
break;
default:
temp = ramdac->indexed_data[ramdac->index];