CirrusVGAState *s = opaque;
int val, index;
- /* check port range access depending on color/monochrome mode */
- if ((addr >= 0x3b0 && addr <= 0x3bf && (s->vga.msr & MSR_COLOR_EMULATION))
- || (addr >= 0x3d0 && addr <= 0x3df
- && !(s->vga.msr & MSR_COLOR_EMULATION))) {
+ if (vga_ioport_invalid(&s->vga, addr)) {
val = 0xff;
} else {
switch (addr) {
int index;
/* check port range access depending on color/monochrome mode */
- if ((addr >= 0x3b0 && addr <= 0x3bf && (s->vga.msr & MSR_COLOR_EMULATION))
- || (addr >= 0x3d0 && addr <= 0x3df
- && !(s->vga.msr & MSR_COLOR_EMULATION)))
+ if (vga_ioport_invalid(&s->vga, addr)) {
return;
-
+ }
#ifdef DEBUG_VGA
printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
#endif
return s->st01 ^ (ST01_V_RETRACE | ST01_DISP_ENABLE);
}
+int vga_ioport_invalid(VGACommonState *s, uint32_t addr)
+{
+ if (s->msr & MSR_COLOR_EMULATION) {
+ /* Color */
+ return (addr >= 0x3b0 && addr <= 0x3bf);
+ } else {
+ /* Monochrome */
+ return (addr >= 0x3d0 && addr <= 0x3df);
+ }
+}
+
uint32_t vga_ioport_read(void *opaque, uint32_t addr)
{
VGACommonState *s = opaque;
int val, index;
- /* check port range access depending on color/monochrome mode */
- if ((addr >= 0x3b0 && addr <= 0x3bf && (s->msr & MSR_COLOR_EMULATION)) ||
- (addr >= 0x3d0 && addr <= 0x3df && !(s->msr & MSR_COLOR_EMULATION))) {
+ if (vga_ioport_invalid(s, addr)) {
val = 0xff;
} else {
switch(addr) {
int index;
/* check port range access depending on color/monochrome mode */
- if ((addr >= 0x3b0 && addr <= 0x3bf && (s->msr & MSR_COLOR_EMULATION)) ||
- (addr >= 0x3d0 && addr <= 0x3df && !(s->msr & MSR_COLOR_EMULATION)))
+ if (vga_ioport_invalid(s, addr)) {
return;
-
+ }
#ifdef DEBUG_VGA
printf("VGA: write addr=0x%04x data=0x%02x\n", addr, val);
#endif
unsigned int color0, unsigned int color1,
unsigned int color_xor);
+int vga_ioport_invalid(VGACommonState *s, uint32_t addr);
+
extern const uint8_t sr_mask[8];
extern const uint8_t gr_mask[16];