diff options
Diffstat (limited to 'hw/parallel.c')
| -rw-r--r-- | hw/parallel.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/hw/parallel.c b/hw/parallel.c index 8402eadf9b..66bc715fa4 100644 --- a/hw/parallel.c +++ b/hw/parallel.c @@ -129,6 +129,7 @@ static void parallel_ioport_write_hw(void *opaque, uint32_t addr, uint32_t val) { ParallelState *s = opaque; uint8_t parm = val; + int dir; /* Sometimes programs do several writes for timing purposes on old HW. Take care not to waste time on writes that do nothing. */ @@ -154,6 +155,17 @@ static void parallel_ioport_write_hw(void *opaque, uint32_t addr, uint32_t val) if (s->control == val) return; pdebug("wc%02x\n", val); + + if ((val & PARA_CTR_DIR) != (s->control & PARA_CTR_DIR)) { + if (val & PARA_CTR_DIR) { + dir = 1; + } else { + dir = 0; + } + qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_DATA_DIR, &dir); + parm &= ~PARA_CTR_DIR; + } + qemu_chr_ioctl(s->chr, CHR_IOCTL_PP_WRITE_CONTROL, &parm); s->control = val; break; |