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sgi: make newport graphics work in MAME

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MAME doesnt support RGB Map 1 mode so use RGB Map 0 instead.

Hardware cursor is screwed up too, so just implement
software cursor for now.
This commit is contained in:
cinap_lenrek 2024-01-02 02:06:08 +00:00
parent 59d4a6261f
commit f62e54b13d
2 changed files with 81 additions and 9 deletions
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2
sys/src/9/sgi/indy
View file

@ -16,7 +16,7 @@ dev
cap
kprof
# sd
draw screen
draw screen swcursor
mouse
kbd

88
sys/src/9/sgi/screen.c
View file

@ -12,6 +12,12 @@
#include <cursor.h>
#include "screen.h"
/*
* MAME screws up hardware cursor,
* so use software cursor for now.
*/
#define SWCURSOR 1
/*
* Register constant below from XFree86 driver.
*/
@ -431,7 +437,6 @@ static Newport *regs = IO(Newport, GIO_NEWPORT);
static Newport *regsgo = IO(Newport, GIO_NEWPORT|0x800);
Memimage *gscreen;
static Point curoff;
static void
vc2set(uchar r, ushort val)
@ -452,6 +457,71 @@ vc2get(uchar r)
return regs->dcbdata0 >> 16;
}
static void
hwcursoroff(void)
{
int s;
s = splhi();
vc2set(VC2_IREG_CONTROL, vc2get(VC2_IREG_CONTROL) & ~VC2_CTRL_ECDISP);
splx(s);
}
#ifdef SWCURSOR
/* swcursor.c */
extern void swcursorhide(int);
extern void swcursoravoid(Rectangle);
extern void swcursordraw(Point);
extern void swcursorload(Cursor *);
extern void swcursorinit(void);
void
cursoron(void)
{
swcursorhide(0);
swcursordraw(mousexy());
}
void
cursoroff(void)
{
swcursorhide(0);
}
void
setcursor(Cursor* curs)
{
swcursorload(curs);
}
int
hwdraw(Memdrawparam *par)
{
Memimage *dst, *src, *mask;
uchar *scrd;
if((dst = par->dst) == nil || dst->data == nil)
return 0;
if((src = par->src) && src->data == nil)
src = nil;
if((mask = par->mask) && mask->data == nil)
mask = nil;
scrd = gscreen->data->bdata;
if(dst->data->bdata == scrd)
swcursoravoid(par->r);
if(src && src->data->bdata == scrd)
swcursoravoid(par->sr);
if(mask && mask->data->bdata == scrd)
swcursoravoid(par->mr);
return 0;
}
#else
static Point curoff;
void
cursoron(void)
@ -471,11 +541,7 @@ cursoron(void)
void
cursoroff(void)
{
int s;
s = splhi();
vc2set(VC2_IREG_CONTROL, vc2get(VC2_IREG_CONTROL) & ~VC2_CTRL_ECDISP);
splx(s);
hwcursoroff();
}
void
@ -515,7 +581,9 @@ setcursor(Cursor *curs)
regs->dcbdata0 = *(ushort*)(&mem[i]) << 16;
}
splx(s);
}
}
#endif
static void
setmode(void)
@ -531,7 +599,7 @@ setmode(void)
regs->dcbmode = (DCB_XMAP_ALL | W_DCB_XMAP9_PROTOCOL |
XM9_CRS_MODE_REG_DATA | NPORT_DMODE_W4);
regs->dcbdata0 = (XM9_MREG_PIX_SIZE_24BPP |
XM9_MREG_PIX_MODE_RGB1 | XM9_MREG_GAMMA_BYPASS);
XM9_MREG_PIX_MODE_RGB0 | XM9_MREG_GAMMA_BYPASS);
while(regs->stat & NPORT_STAT_BBUSY)
;
@ -568,6 +636,10 @@ flushmemscreen(Rectangle r)
modeset = 1;
arcsoff();
setmode();
#ifdef SWCURSOR
hwcursoroff();
swcursorinit();
#endif
}
while(regs->stat & NPORT_STAT_GBUSY)