80486DX2-66/86Box-fork
1
0
Fork 0
Code Issues Pull Requests Activity

NCR 53c400 timing fixes.

Browse Source 
See above (CD-ROM speeds too for said SCSI chips).
This commit is contained in:
TC1995
2024-05-30 00:25:29 +02:00
parent d00f7ebf98
commit 3d74f43b95
1 changed files with 9 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/scsi/scsi_ncr53c400.c
View File

@@ -146,8 +146,8 @@ ncr53c400_write(uint32_t addr, uint8_t val, void *priv)
if (ncr400->buffer_host_pos == MIN(128, dev->buffer_length)) {
ncr400->status_ctrl |= STATUS_BUFFER_NOT_READY;
ncr400->busy = 1;
if (!(ncr->mode & MODE_MONITOR_BUSY))
timer_on_auto(&ncr400->timer, ncr->period / 280.0);
if (!(ncr->mode & MODE_MONITOR_BUSY) && ((scsi_device_get_callback(dev) > 0.0)))
timer_on_auto(&ncr400->timer, ncr->period / 250.0);
}
}
break;
@@ -182,9 +182,12 @@ ncr53c400_write(uint32_t addr, uint8_t val, void *priv)
memset(ncr400->buffer, 0, MIN(128, dev->buffer_length));
if (ncr->mode & MODE_MONITOR_BUSY)
timer_on_auto(&ncr400->timer, ncr->period);
else
else if (scsi_device_get_callback(dev) > 0.0)
timer_on_auto(&ncr400->timer, 40.0);
ncr53c400_log("DMA timer on, callback=%lf, scsi buflen=%d, waitdata=%d, waitcomplete=%d, clearreq=%d, datawait=%d, enabled=%d.\n", scsi_device_get_callback(dev), dev->buffer_length, ncr->wait_complete, ncr->wait_data, ncr->wait_complete, ncr->clear_req, ncr->data_wait, timer_is_enabled(&ncr400->timer));
else
timer_on_auto(&ncr400->timer, ncr->period);
ncr53c400_log("DMA timer on=%02x, callback=%lf, scsi buflen=%d, waitdata=%d, waitcomplete=%d, clearreq=%d, datawait=%d, enabled=%d.\n", ncr->mode & MODE_MONITOR_BUSY, scsi_device_get_callback(dev), dev->buffer_length, ncr->wait_complete, ncr->wait_data, ncr->wait_complete, ncr->clear_req, ncr->data_wait, timer_is_enabled(&ncr400->timer));
}
break;
@@ -239,8 +242,8 @@ ncr53c400_read(uint32_t addr, void *priv)
if (ncr400->buffer_host_pos == MIN(128, dev->buffer_length)) {
ncr400->status_ctrl |= STATUS_BUFFER_NOT_READY;
ncr53c400_log("Transfer busy read, status = %02x.\n", ncr400->status_ctrl);
if (!(ncr->mode & MODE_MONITOR_BUSY))
timer_on_auto(&ncr400->timer, ncr->period / 280.0);
if (!(ncr->mode & MODE_MONITOR_BUSY) && (scsi_device_get_callback(dev) > 0.0))
timer_on_auto(&ncr400->timer, ncr->period / 250.0);
}
}
break;