Revision 563e3c6e hw/parallel.c
| b/hw/parallel.c | ||
|---|---|---|
| 129 | 129 |
{
|
| 130 | 130 |
ParallelState *s = opaque; |
| 131 | 131 |
uint8_t parm = val; |
| 132 |
int dir; |
|
| 132 | 133 |
|
| 133 | 134 |
/* Sometimes programs do several writes for timing purposes on old |
| 134 | 135 |
HW. Take care not to waste time on writes that do nothing. */ |
| ... | ... | |
| 154 | 155 |
if (s->control == val) |
| 155 | 156 |
return; |
| 156 | 157 |
pdebug("wc%02x\n", val);
|
| 158 |
|
|
| 159 |
if ((val & PARA_CTR_DIR) != (s->control & PARA_CTR_DIR)) {
|
|
| 160 |
if (val & PARA_CTR_DIR) {
|
|
| 161 |
dir = 1; |
|
| 162 |
} else {
|
|
| 163 |
dir = 0; |
|
| 164 |
} |
|
| 165 |
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_DATA_DIR, &dir); |
|
| 166 |
parm &= ~PARA_CTR_DIR; |
|
| 167 |
} |
|
| 168 |
|
|
| 157 | 169 |
qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_CONTROL, &parm); |
| 158 | 170 |
s->control = val; |
| 159 | 171 |
break; |
Also available in: Unified diff