Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added Cirrus Logic GD5428 emulation.

Browse source 
As part of this, added emulation of the GD5428-based IBM 1MB SVGA Adapter/A,
along with support for external graphics cards on MCA platforms, adding the
ability to override the onboard VGA controller.
This commit is contained in:
SarahW 2020-02-01 16:30:34 +00:00
commit 68a2d8cb3c
14 changed files with 342 additions and 43 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/mca.c
View file

@ -6,6 +6,7 @@
void (*mca_card_write[8])(int addr, uint8_t val, void *priv);
uint8_t (*mca_card_read[8])(int addr, void *priv);
void (*mca_card_reset[8])(void *priv);
void *mca_priv[8];
static int mca_index;
static int mca_nr_cards;
@ -14,10 +15,13 @@ void mca_init(int nr_cards)
{
int c;
MCA = 1;
for (c = 0; c < 8; c++)
{
mca_card_read[c] = NULL;
mca_card_write[c] = NULL;
mca_card_reset[c] = NULL;
mca_priv[c] = NULL;
}
@ -47,7 +51,18 @@ void mca_write(uint16_t port, uint8_t val)
mca_card_write[mca_index](port, val, mca_priv[mca_index]);
}
void mca_add(uint8_t (*read)(int addr, void *priv), void (*write)(int addr, uint8_t val, void *priv), void *priv)
void mca_reset(void)
{
int c;
for (c = 0; c < 8; c++)
{
if (mca_card_reset[c])
mca_card_reset[c](mca_priv[c]);
}
}
void mca_add(uint8_t (*read)(int addr, void *priv), void (*write)(int addr, uint8_t val, void *priv), void (*reset)(void *priv), void *priv)
{
int c;
@ -57,6 +72,7 @@ void mca_add(uint8_t (*read)(int addr, void *priv), void (*write)(int addr, uint
{
mca_card_read[c] = read;
mca_card_write[c] = write;
mca_card_reset[c] = reset;
mca_priv[c] = priv;
return;
}