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Fixed CD-ROM timings on the NCR 53x8xx SCSI controllers, the IDE_TIME, CDROM_TIME, and ZIP_TIME values, and the delay added to the CD-ROM READ SUBCHANNEL command, fixes slowdowns on several games that use CD Audio, such as Tomb Raider II.

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OBattler
2019-11-19 04:35:54 +01:00
parent 841a1f67da
commit e4408bc84d
7 changed files with 97 additions and 58 deletions
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32
src/disk/zip.c
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@@ -9,11 +9,11 @@
* Implementation of the Iomega ZIP drive with SCSI(-like)
* commands, for both ATAPI and SCSI usage.
*
* Version: @(#)zip.c 1.0.37 2018/11/02
* Version: @(#)zip.c 1.0.38 2019/11/19
*
* Author: Miran Grca, <mgrca8@gmail.com>
*
* Copyright 2018 Miran Grca.
* Copyright 2018,2019 Miran Grca.
*/
#include <stdio.h>
#include <stdint.h>
@@ -854,6 +854,26 @@ zip_update_request_length(zip_t *dev, int len, int block_len)
}
static double
zip_bus_speed(zip_t *dev)
{
double ret = -1.0;
if (dev->drv->bus_type == ZIP_BUS_SCSI) {
dev->callback = -1.0; /* Speed depends on SCSI controller */
return 0.0;
} else {
if (dev && dev->drv)
ret = ide_atapi_get_period(dev->drv->ide_channel);
if (ret == -1.0) {
dev->callback = -1.0;
return 0.0;
} else
return ret * 1000000.0;
}
}
static void
zip_command_common(zip_t *dev)
{
@@ -868,12 +888,8 @@ zip_command_common(zip_t *dev)
if (dev->drv->bus_type == ZIP_BUS_SCSI) {
dev->callback = -1.0; /* Speed depends on SCSI controller */
return;
} else {
if (zip_current_mode(dev) == 2)
bytes_per_second = 66666666.666666666666666; /* 66 MB/s MDMA-2 speed */
else
bytes_per_second = 8333333.333333333333333; /* 8.3 MB/s PIO-2 speed */
}
} else
bytes_per_second = zip_bus_speed(dev);
period = 1000000.0 / bytes_per_second;
dev->callback = period * (double) (dev->packet_len);