4b5be4f2f6
Fixed a tiny bug in the Cirrus Logic blitter; Adding DEV_BRANCH=y parameter to make now compiles the Cirrus Logic emulation code *and* the Nvidia Riva emulation code; The Sierra SC1502x RAMDAC emulation code is now correctly named as such; The makefile now knows the dependencies for a lot more files (with the unfortunate effect that 86Box.exe is now 8 MB after stripping); win_setting.c no longer includes scsi_buslogic.c - that was a leftover of long gone code.
95 lines
3.0 KiB
C
95 lines
3.0 KiB
C
/* Copyright holders: Sarah Walker, Tenshi
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see COPYING for more details
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*/
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/*It is unknown exactly what RAMDAC this is
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It is possibly a Sierra 1502x
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It's addressed by the TLIVESA1 driver for ET4000*/
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/* Note by Tenshi: Not possibly, this *IS* a Sierra 1502x. */
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#include "../ibm.h"
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#include "../mem.h"
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#include "video.h"
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#include "vid_svga.h"
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#include "vid_sc1502x_ramdac.h"
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void sc1502x_ramdac_out(uint16_t addr, uint8_t val, sc1502x_ramdac_t *ramdac, svga_t *svga)
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{
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int oldbpp = 0;
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switch (addr)
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{
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case 0x3C6:
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if (ramdac->state == 4)
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{
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ramdac->state = 0;
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if (val == 0xFF) break;
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ramdac->ctrl = val;
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oldbpp = svga->bpp;
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switch ((val&1)|((val&0xC0)>>5))
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{
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case 0:
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svga->bpp = 8;
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break;
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case 2: case 3:
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switch (val & 0x20)
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{
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case 0x00: svga->bpp = 32; break;
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case 0x20: svga->bpp = 24; break;
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}
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break;
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case 4: case 5:
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svga->bpp = 15;
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break;
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case 6:
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svga->bpp = 16;
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break;
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case 7:
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switch (val & 4)
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{
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case 4:
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switch (val & 0x20)
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{
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case 0x00: svga->bpp = 32; break;
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case 0x20: svga->bpp = 24; break;
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}
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break;
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case 0: default:
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svga->bpp = 16;
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break;
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}
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case 1: default:
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break;
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}
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if (oldbpp != svga->bpp)
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{
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svga_recalctimings(svga);
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}
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return;
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}
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ramdac->state = 0;
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break;
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case 0x3C7: case 0x3C8: case 0x3C9:
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ramdac->state = 0;
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break;
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}
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svga_out(addr, val, svga);
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}
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uint8_t sc1502x_ramdac_in(uint16_t addr, sc1502x_ramdac_t *ramdac, svga_t *svga)
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{
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switch (addr)
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{
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case 0x3C6:
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if (ramdac->state == 4)
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{
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ramdac->state = 0;
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return ramdac->ctrl;
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}
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ramdac->state++;
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break;
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case 0x3C7: case 0x3C8: case 0x3C9:
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ramdac->state = 0;
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break;
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}
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return svga_in(addr, svga);
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}
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