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Accelerator fixes part 1:

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XGA: Fix crash when (S)VGA cards not selected as the primary display (e.g.: EGA, CGA. etc).
Better handling of the VGA on/off passthrough (vga_on variable).
MCA side: to avoid lfb issues, bit 0 of POS4 will be always enabled regardless of the ram size (most software uses the >16MB memory method).
Better handling of the BIOS ROM mapping and Memory Mapped I/O during the MCA PS/2 POST and resets, fixes 40 25 hang (once and for all).
Re-organized the ROM loading in ISA mode.
This commit is contained in:
TC1995
2023-05-05 19:08:49 +02:00
parent ec51229fd5
commit a77271cfa6
3 changed files with 143 additions and 118 deletions
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7
src/include/86box/vid_svga.h
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@@ -184,6 +184,13 @@ extern int vga_on, ibm8514_on;
extern void ibm8514_poll(ibm8514_t *dev, svga_t *svga);
extern void ibm8514_recalctimings(svga_t *svga);
extern uint8_t ibm8514_ramdac_in(uint16_t port, void *p);
extern void ibm8514_ramdac_out(uint16_t port, uint8_t val, void *p);
extern int ibm8514_cpu_src(svga_t *svga);
extern int ibm8514_cpu_dest(svga_t *svga);
extern void ibm8514_accel_out_pixtrans(svga_t *svga, uint16_t port, uint16_t val, int len);
extern void ibm8514_short_stroke_start(int count, int cpu_input, uint32_t mix_dat, uint32_t cpu_dat, svga_t *svga, uint8_t ssv, int len);
extern void ibm8514_accel_start(int count, int cpu_input, uint32_t mix_dat, uint32_t cpu_dat, svga_t *svga, int len);
extern void xga_poll(xga_t *xga, svga_t *svga);
extern void xga_recalctimings(svga_t *svga);