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Video card can now be changed on Amstrad PC1640, PC2086, PC3086, and Sinclair PC200.

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This commit is contained in:
SarahW 2018-02-24 22:27:32 +00:00
commit 9bdfc9348f
9 changed files with 340 additions and 119 deletions
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36
src/amstrad.c
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@ -4,10 +4,12 @@
#include "keyboard.h"
#include "lpt.h"
#include "mouse.h"
#include "video.h"
#include "amstrad.h"
static uint8_t amstrad_dead;
int amstrad_latch = 0;
uint8_t amstrad_read(uint16_t port, void *priv)
{
@ -23,8 +25,38 @@ uint8_t amstrad_read(uint16_t port, void *priv)
case 0x37a:
temp = lpt1_read(port, NULL) & 0x1f;
if (romset == ROM_PC1512) return temp | 0x20;
if (romset == ROM_PC200) return temp | 0x80;
if (romset == ROM_PC200)
{
if (video_is_cga())
temp |= 0x80;
else if (video_is_mda())
temp |= 0xc0;
return temp;
}
if (romset == ROM_PC1640)
{
if (video_is_cga())
temp |= 0x80;
else if (video_is_mda())
temp |= 0xc0;
switch (amstrad_latch)
{
case AMSTRAD_NOLATCH:
temp &= ~0x20;
break;
case AMSTRAD_SW9:
temp &= ~0x20;
break;
case AMSTRAD_SW10:
temp |= 0x20;
break;
}
}
return temp;
case 0x3de:
return 0x20; /*PC200 - use external video. If internal video is being used
then this port is handled in vid_pc200.c*/
case 0xdead:
return amstrad_dead;
}
@ -121,4 +153,6 @@ void amstrad_init()
io_sethandler(0x007a, 0x0001, amstrad_mouse_read, NULL, NULL, amstrad_mouse_write, NULL, NULL, NULL);
io_sethandler(0x0378, 0x0003, amstrad_read, NULL, NULL, amstrad_write, NULL, NULL, NULL);
io_sethandler(0xdead, 0x0001, amstrad_read, NULL, NULL, amstrad_write, NULL, NULL, NULL);
if (romset == ROM_PC200 && gfxcard != GFX_BUILTIN)
io_sethandler(0x03de, 0x0001, amstrad_read, NULL, NULL, amstrad_write, NULL, NULL, NULL);
}