diff options
| -rw-r--r-- | hw/ide.c | 17 |
1 files changed, 15 insertions, 2 deletions
@@ -336,6 +336,7 @@ typedef struct IDEState { uint8_t *data_end; uint8_t io_buffer[MAX_MULT_SECTORS*512 + 4]; QEMUTimer *sector_write_timer; /* only used for win2k instal hack */ + uint32_t irq_count; /* counts IRQs when using win2k install hack */ } IDEState; #define BM_STATUS_DMAING 0x01 @@ -712,7 +713,7 @@ static void ide_sector_write(IDEState *s) ide_set_sector(s, sector_num + n); #ifdef TARGET_I386 - if (win2k_install_hack) { + if (win2k_install_hack && ((++s->irq_count % 16) == 0)) { /* It seems there is a bug in the Windows 2000 installer HDD IDE driver which fills the disk with empty logs when the IDE write IRQ comes too early. This hack tries to correct @@ -750,7 +751,19 @@ static int ide_write_dma_cb(IDEState *s, if (n == 0) { /* end of transfer */ s->status = READY_STAT | SEEK_STAT; - ide_set_irq(s); +#ifdef TARGET_I386 + if (win2k_install_hack && ((++s->irq_count % 16) == 0)) { + /* It seems there is a bug in the Windows 2000 installer + HDD IDE driver which fills the disk with empty logs + when the IDE write IRQ comes too early. This hack tries + to correct that at the expense of slower write + performances. Use this option _only_ to install Windows + 2000. You must disable it for normal use. */ + qemu_mod_timer(s->sector_write_timer, + qemu_get_clock(vm_clock) + (ticks_per_sec / 1000)); + } else +#endif + ide_set_irq(s); return 0; } if (n > MAX_MULT_SECTORS) |