diff options
| -rw-r--r-- | hw/pc.h | 4 | ||||
| -rw-r--r-- | hw/vga.c | 36 | ||||
| -rw-r--r-- | qemu-options.hx | 19 | ||||
| -rw-r--r-- | vl.c | 23 |
4 files changed, 8 insertions, 74 deletions
@@ -176,10 +176,6 @@ enum vga_retrace_method { extern enum vga_retrace_method vga_retrace_method; -#define VGA_CGA_HACK_PALETTE_BLANKING (1<<0) -#define VGA_CGA_HACK_FONT_HEIGHT (1<<1) -extern int vga_cga_hacks; - static inline DeviceState *isa_vga_init(ISABus *bus) { ISADevice *dev; @@ -547,31 +547,14 @@ void vga_ioport_write(void *opaque, uint32_t addr, uint32_t val) printf("vga: write CR%x = 0x%02x\n", s->cr_index, val); #endif /* handle CR0-7 protection */ - if (s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) { - if (s->cr_index <= VGA_CRTC_OVERFLOW) { - /* can always write bit 4 of CR7 */ - if (s->cr_index == VGA_CRTC_OVERFLOW) { - s->cr[VGA_CRTC_OVERFLOW] = - (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) | (val & 0x10); - } - return; - } else if ((vga_cga_hacks & VGA_CGA_HACK_FONT_HEIGHT) && - !(s->sr[VGA_SEQ_CLOCK_MODE] & VGA_SR01_CHAR_CLK_8DOTS)) { - /* extra CGA compatibility hacks (not in standard VGA) */ - if (s->cr_index == VGA_CRTC_MAX_SCAN && - val == 7 && - (s->cr[VGA_CRTC_MAX_SCAN] & 0xf) == 0xf) { - return; - } else if (s->cr_index == VGA_CRTC_CURSOR_START && - val == 6 && - (s->cr[VGA_CRTC_MAX_SCAN] & 0xf) == 0xf) { - val = 0xd; - } else if (s->cr_index == VGA_CRTC_CURSOR_END && - val == 7 && - (s->cr[VGA_CRTC_MAX_SCAN] & 0xf) == 0xf) { - val = 0xe; - } + if ((s->cr[VGA_CRTC_V_SYNC_END] & VGA_CR11_LOCK_CR0_CR7) && + s->cr_index <= VGA_CRTC_OVERFLOW) { + /* can always write bit 4 of CR7 */ + if (s->cr_index == VGA_CRTC_OVERFLOW) { + s->cr[VGA_CRTC_OVERFLOW] = (s->cr[VGA_CRTC_OVERFLOW] & ~0x10) | + (val & 0x10); } + return; } s->cr[s->cr_index] = val; @@ -1903,10 +1886,7 @@ static void vga_update_display(void *opaque) /* nothing to do */ } else { full_update = 0; - if (!(s->ar_index & 0x20) && - /* extra CGA compatibility hacks (not in standard VGA */ - (!(vga_cga_hacks & VGA_CGA_HACK_PALETTE_BLANKING) || - (s->ar_index != 0 && s->ar_flip_flop))) { + if (!(s->ar_index & 0x20)) { graphic_mode = GMODE_BLANK; } else { graphic_mode = s->gr[VGA_GFX_MISC] & VGA_GR06_GRAPHICS_MODE; diff --git a/qemu-options.hx b/qemu-options.hx index 0682338..3e8085d 100644 --- a/qemu-options.hx +++ b/qemu-options.hx @@ -975,25 +975,6 @@ Valid optional properties are @item retrace=dumb|precise Select dumb (default) or precise VGA retrace logic, useful for some DOS games/demos. -@item cga_hacks=@var{hack1}[+@var{hack2},[...]] -Enable various extra CGA compatibility hacks for programs that are -trying to directly set CGA modes without BIOS assistance nor -real knowledge of EGA/VGA. These might only work with -vga std. -Valid hacks are -@table @option -@item palette_blanking -Wait to blank the screen until palette registers seem to actually be -modified, instead of blanking it as soon as the palette address bit (0x10) -of the attribute address register (0x3c0) is cleared. -@item font_height -Ignore attempts to change the VGA font height (index 9), -cursor start (index 10), and cursor end (index 11) of the CRTC control -registers (0x3d5) if trying to set them to the default for CGA fonts -instead of VGA fonts. -@item all -Enable all CGA hacks. More CGA hacks may be added in future versions -of qemu. -@end table @end table ETEXI @@ -179,7 +179,6 @@ int main(int argc, char **argv) static const char *data_dir; const char *bios_name = NULL; enum vga_retrace_method vga_retrace_method = VGA_RETRACE_DUMB; -int vga_cga_hacks = 0; DisplayType display_type = DT_DEFAULT; int display_remote = 0; const char* keyboard_layout = NULL; @@ -1749,28 +1748,6 @@ static void select_vgahw (const char *p) else if (strstart(opts, "precise", &nextopt)) vga_retrace_method = VGA_RETRACE_PRECISE; else goto invalid_vga; - } else if (strstart(opts, ",cga_hacks=", &nextopt)) { - opts = nextopt; - while (*opts) { - if (strstart(opts, "all", &nextopt)) { - opts = nextopt; - vga_cga_hacks |= ~0; - } else if (strstart(opts, "palette_blanking", &nextopt)) { - opts = nextopt; - vga_cga_hacks |= VGA_CGA_HACK_PALETTE_BLANKING; - } else if (strstart(opts, "font_height", &nextopt)) { - opts = nextopt; - vga_cga_hacks |= VGA_CGA_HACK_FONT_HEIGHT; - } else { - break; - } - - if (*opts == '+') { - opts++; - } else { - break; - } - } } else goto invalid_vga; opts = nextopt; } |