dc46480aa4
Added experimental NVidia Riva TNT2 emulation (patch from MoochMcGee); ASUS P/I-P54TP4XE, ASUS P/I-P55T2P4, and ASUS P/I-P55TVP4 are back; National Semiconductor PC87306 Super I/O chip now correctly reenables devices after a chip power cycle; Several FDC improvements and the behavior is now a bit closer to real hardware (based on actual tests); Added MR Intel Advanced/ATX with Microid Research BIOS with support for 4 floppy drives and up to 4 IDE controllers; Added floppy drives 3 and 4, bringing the maximum to 4; You can now connect hard disks to the tertiary IDE controller; Correct undocumented behavior of the LEA instruction with register is back on 286 and later CPU's; Pentium-rea models with Intel chipsets now have port 92 (with alternate reset and alternate A20 toggle); Overhauled DMA channel read and write routines and fixed cascading; Improved IMG detection of a bad BPB (or complete lack of a BPB); Added preliminary emulation of PS/2 1.44 MB and PC-98 1.25 MB 3-mode drives (both have an inverted DENSEL pin); Removed the incorrect Amstrad mouse patch from TheCollector1995; Fixed ATAPI CD-ROM disk change detection; Windows IOCTL CD-ROM handler now tries to use direct SCSI passthrough for more things, including obtaining CD-ROM capacity; The Diamond Stealth32 (ET4000/W32p) now also works correctly on the two Award SiS 496/497 boxes; The (S)VGA handler now converts 6-bit RAMDAC RGB channels to standard 8-bit RGB using a lookup table generated at emulator start, calculated using the correct intensity conversion method and treating intensity 64 as equivalent to 63; Moved a few options from the Configuration dialog box to the menu; SIO, PIIX, and PIIX3 now have the reset control register on port CF9 as they should; Several bugfixes.
108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/* Copyright holders: SA1988
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see COPYING for more details
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*/
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/*SCSI layer emulation*/
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#include <stdlib.h>
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#include <string.h>
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#include "86box.h"
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#include "ibm.h"
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#include "device.h"
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#include "cdrom.h"
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#include "scsi.h"
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int ScsiCallback[7] = {0,0,0,0,0,0,0};
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uint8_t scsi_cdrom_id = 3; /*common setting*/
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void SCSIQueryResidual(SCSI *Scsi, uint32_t *Residual)
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{
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*Residual = ScsiStatus == SCSI_STATUS_OK ? 0 : Scsi->SegmentData.Length;
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}
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static uint32_t SCSICopyFromBuffer(uint32_t OffDst, SGBUF *SegmentBuffer,
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uint32_t Copy)
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{
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const SGSEG *SegmentArray = SegmentBuffer->SegmentPtr;
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unsigned SegmentNum = SegmentBuffer->SegmentNum;
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uint32_t Copied = 0;
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SGBUF SegmentBuffer2;
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SegmentBufferInit(&SegmentBuffer2, SegmentArray, SegmentNum);
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SegmentBufferAdvance(&SegmentBuffer2, OffDst);
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Copied = SegmentBufferCopy(&SegmentBuffer2, SegmentBuffer, Copy);
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return Copied;
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}
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static uint32_t SCSICopyToBuffer(uint32_t OffSrc, SGBUF *SegmentBuffer,
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uint32_t Copy)
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{
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const SGSEG *SegmentArray = SegmentBuffer->SegmentPtr;
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unsigned SegmentNum = SegmentBuffer->SegmentNum;
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uint32_t Copied = 0;
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SGBUF SegmentBuffer2;
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SegmentBufferInit(&SegmentBuffer2, SegmentArray, SegmentNum);
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SegmentBufferAdvance(&SegmentBuffer2, OffSrc);
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Copied = SegmentBufferCopy(&SegmentBuffer2, SegmentBuffer, Copy);
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return Copied;
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}
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void SCSIWriteTransfer(SCSI *Scsi, uint8_t Id)
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{
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if ((Scsi->BufferPosition >= prefix_len + 4) && (page_flags[page_current] & PAGE_CHANGEABLE))
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{
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mode_pages_in[page_current][Scsi->BufferPosition - prefix_len - 4] = Scsi->SegmentData.Address[Scsi->BufferPosition - 2];
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mode_pages_in[page_current][Scsi->BufferPosition - prefix_len - 3] = Scsi->SegmentData.Address[Scsi->BufferPosition - 1];
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}
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SGBUF SegmentBuffer;
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SCSICopyToBuffer(Scsi->SegmentData.Length, &SegmentBuffer, 1);
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pfnIoRequestCopyToBuffer(0, &SegmentBuffer, Scsi->SegmentData.Length);
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}
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void SCSIReadTransfer(SCSI *Scsi, uint8_t Id)
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{
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SCSICDROM_ReadCallback(Scsi, Id);
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SGBUF SegmentBuffer;
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SCSICopyFromBuffer(Scsi->SegmentData.Length, &SegmentBuffer, 1);
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pfnIoRequestCopyFromBuffer(0, &SegmentBuffer, Scsi->SegmentData.Length);
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}
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void SCSISendCommand(SCSI *Scsi, uint8_t Id, uint8_t *Cdb, uint8_t CdbLength, uint32_t DataBufferLength, uint8_t *SenseBufferPointer, uint8_t SenseBufferLength)
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{
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uint32_t i;
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for (i = 0; i < CdbLength; i++)
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pclog("Cdb[%d]=0x%02X\n", i, Cdb[i]);
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Scsi->CdbLength = CdbLength;
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pclog("SCSI CD-ROM in ID %d\n", Id);
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SCSICDROM_RunCommand(Scsi, Id, Cdb, SenseBufferLength, SenseBufferPointer, DataBufferLength);
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}
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void SCSIReset(SCSI *Scsi, uint8_t Id)
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{
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page_flags[GPMODE_CDROM_AUDIO_PAGE] &= 0xFD; /* Clear changed flag for CDROM AUDIO mode page. */
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memset(mode_pages_in[GPMODE_CDROM_AUDIO_PAGE], 0, 256); /* Clear the page itself. */
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if (scsi_cdrom_enabled)
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{
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if (cdrom_enabled)
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{
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Scsi->LunType = SCSI_CDROM;
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}
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}
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else
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{
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Scsi->LunType = SCSI_NONE;
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}
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pfnIoRequestCopyFromBuffer = SCSICopyFromBuffer;
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pfnIoRequestCopyToBuffer = SCSICopyToBuffer;
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page_flags[GPMODE_CDROM_AUDIO_PAGE] &= ~PAGE_CHANGED;
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} |