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+KVM: 0.536
+hypervisor: 0.517
+TCG: 0.477
+peripherals: 0.470
+ppc: 0.468
+VMM: 0.465
+x86: 0.462
+i386: 0.460
+vnc: 0.433
+risc-v: 0.422
+virtual: 0.389
+user-level: 0.385
+mistranslation: 0.363
+debug: 0.360
+register: 0.358
+files: 0.345
+performance: 0.344
+graphic: 0.337
+device: 0.335
+architecture: 0.330
+kernel: 0.327
+semantic: 0.323
+PID: 0.321
+boot: 0.320
+arm: 0.320
+permissions: 0.319
+assembly: 0.314
+network: 0.306
+socket: 0.299
+
+ESP SCSI adapter not working with DOS ASPI drivers
+
+I have been trying to install the DOS ASPI drivers for the ESP scsi card. Both in am53c974 and dc390 modes. Neither works but they don't work in different ways.
+
+The following things appear to be problematic:
+
+* The am53c974 should work with the PcSCSI drivers (AMSIDA.SYS) but the ASPI driver never manages to get past initializing the card. The VM never continues.
+* The dc390 ASPI driver fares a little better. The ASPI driver loads and is semi-functional but the drivers for the peripherals don't work.
+ - ASPI.SYS (creative name) loads
+ - TRMDISK.SYS fails to load when a cd-drive is attached and will crashs scanning the scsi-id where the cd drive is attached
+ - TRMDISK.SYS loads without a CD drive attached but fails to read any scsi-hd devices attached. The TFDISK.EXE formatter crashes.
+ - TRMCD.SYS loads, but can not detect any CD drives.
+
+The various permutations:
+am53c974 hang on ASPI driver load: (CD only attached)
+
+~/src/qemu/build/qemu-system-i386 -m 64 -device am53c974,id=scsi0 -device scsi-cd,drive=drive0,bus=scsi0.0,channel=0,scsi-id=0,lun=0 -drive file=../Windows\ 98\ Second\ Edition.iso,if=none,id=drive0 -vga cirrus -fda am53c974_aspi.img -bios /home/hp/src/seabios/out/bios.bin -boot a  -trace 'scsi*' -trace 'esp*' -D log
+
+dc390 crash because of CDROM attachment and loading TRMDISK.SYS (Only CD attached)
+~/src/qemu/build/qemu-system-i386 -m 64 -device dc390,id=scsi0,rombar=0 -device scsi-cd,drive=drive0,bus=scsi0.0,channel=0,scsi-id=0,lun=0 -drive file=../Windows\ 98\ Second\ Edition.iso,if=none,id=drive0 -vga cirrus -fda dc390_all.img  -bios /home/hp/src/seabios/out/bios.bin -boot a  -trace 'scsi*' -trace 'esp*' -D log
+
+dc390 successful boot, but TRMDISK.SYS not working (TFDISK.EXE will crash)
+~/src/qemu/build/qemu-system-i386 -m 64 -device dc390,id=scsi0 -device scsi-hd,drive=drive0,bus=scsi0.0,channel=0,scsi-id=0,lun=0,logical_block_size=512 -drive file=small.qcow2,if=none,id=drive0 -vga cirrus -fda dc390_all.img -bios /home/hp/src/seabios/out/bios.bin -boot a  -trace 'scsi*' -trace 'esp*' -D log
+
+dc390 successful boot, TRMDISK.SYS not loaded, only TRMCD.SYS. CDROM not detected
+~/src/qemu/build/qemu-system-i386 -m 64 -device dc390,id=scsi0,rombar=0 -device scsi-cd,drive=drive0,bus=scsi0.0,channel=0,scsi-id=0,lun=0 -drive file=../Windows\ 98\ Second\ Edition.iso,if=none,id=drive0 -vga cirrus -fda dc390_cd.img  -bios /home/hp/src/seabios/out/bios.bin -boot a  -trace 'scsi*' -trace 'esp*' -D log
+
+All of these tests were done on 7b9a3c9f94bcac23c534bc9f42a9e914b433b299 as well as the 'esp-next' branch found here: https://github.com/mcayland/qemu/tree/esp-next
+
+The bios file is a seabios master with all int13 support disabled. With it enabled even less works but I figured this would be a seabios bug and not a qemu one.
+
+The actual iso and qcow2 files used don't appear the matter. the 'small.qcow2' is an empty drive of 100MB. I have also tried other ISOs in the CD drives, or even not put any cd in the drives with the same results.
+
+I will attach all of the above images.
+
+
+
+
+
+
+
+
+
+
+
+Something maybe worth noting is that the DC390 driver detectes attached CDROM drives as 'Fixed Disks' which seems a little fishy. The same appears to happen with the lsilogic card (that is cdrom drives get detected as hard drives and causes a failure to load the drivers)
+
+I've had a look at your am53c974 boot floppy with PcSCSI drivers and I'm fairly sure that disabling INT13 support isn't helping here. With your custom SeaBIOS I see a hang issuing the first SCSI command: without your custom SeaBIOS I can see that the default SeaBIOS issues several successful commands to the SCSI bus before booting from the floppy.
+
+Dropping the -bios option and booting your floppy here I see the following sequence with -trace 'scsi*' -trace 'esp*' after the BIOS has initialised:
+
+
+esp_mem_writeb reg[3]: 0x42 -> 0x02
+esp_mem_writeb_cmd_reset Chip reset (0x02)
+esp_mem_writeb reg[3]: 0x02 -> 0x80
+esp_mem_writeb_cmd_nop NOP (0x80)
+esp_mem_writeb reg[11]: 0x00 -> 0x40
+esp_mem_readb reg[14]: 0x12
+esp_pci_sbac_read sbac: 0x00000000
+esp_pci_sbac_write sbac: 0x00000000 -> 0x02000000
+esp_mem_writeb reg[3]: 0x80 -> 0x02
+esp_mem_writeb_cmd_reset Chip reset (0x02)
+esp_mem_writeb reg[3]: 0x02 -> 0x80
+esp_mem_writeb_cmd_nop NOP (0x80)
+esp_mem_writeb reg[8]: 0x00 -> 0x17
+esp_mem_writeb reg[12]: 0x00 -> 0x88
+esp_mem_writeb reg[13]: 0x00 -> 0x40
+esp_mem_writeb reg[11]: 0x00 -> 0x40
+esp_mem_writeb reg[9]: 0x00 -> 0x07
+esp_mem_writeb reg[5]: 0x00 -> 0x8d
+esp_mem_writeb reg[5]: 0x8d -> 0x02
+esp_mem_readb reg[8]: 0x17
+esp_mem_writeb reg[8]: 0x17 -> 0x07
+esp_mem_writeb reg[4]: 0x00 -> 0x00
+esp_mem_writeb reg[3]: 0x80 -> 0x01
+esp_mem_writeb_cmd_flush Flush FIFO (0x01)
+esp_mem_writeb reg[2]: 0x00 -> 0x00
+esp_mem_writeb reg[2]: 0x00 -> 0x00
+esp_mem_writeb reg[2]: 0x00 -> 0x00
+esp_mem_writeb reg[2]: 0x00 -> 0x00
+esp_mem_writeb reg[2]: 0x00 -> 0x00
+esp_mem_writeb reg[2]: 0x00 -> 0x00
+esp_mem_writeb reg[3]: 0x01 -> 0x41
+esp_mem_writeb_cmd_sel Select without ATN (0x41)
+esp_get_cmd len 6 target 0
+esp_do_busid_cmd busid 0x0
+scsi_req_parsed target 0 lun 0 tag 0 command 0 dir 0 length 0
+scsi_req_parsed_lba target 0 lun 0 tag 0 command 0 lba 0
+scsi_req_alloc target 0 lun 0 tag 0
+scsi_disk_new_request Command: lun=0 tag=0x0 data= 0x00 0x00 0x00 0x00 0x00 0x00
+scsi_test_unit_ready target 0 lun 0 tag 0
+scsi_req_dequeue target 0 lun 0 tag 0
+esp_command_complete SCSI Command complete
+esp_raise_irq Raise IRQ
+esp_lower_drq Lower DREQ
+
+******
+esp_pci_dma_read reg[5]: 0x00000018
+esp_mem_readb reg[4]: 0x93
+esp_mem_readb reg[6]: 0x00
+esp_lower_irq Lower IRQ
+esp_mem_readb reg[5]: 0x18
+esp_mem_readb reg[8]: 0x07
+esp_mem_writeb reg[8]: 0x07 -> 0x47
+esp_mem_writeb reg[3]: 0x41 -> 0x03
+esp_mem_writeb_cmd_bus_reset Bus reset (0x03)
+******
+
+
+The loading of the "test unit ready" command and execution look fine to me: QEMU's SCSI layer is executing the command (indicating success) and raises the ESP IRQ. However at this point in the section marked by "******" the ASPI driver seems not be happy with the RSTAT/RINTR register contents or the 0x18 read back from the PCI DMA registers, issues a bus reset and stops.
+
+What is interesting here is that the "Select without ATN (0x41)" command issued is a non-DMA command so I wouldn't expect it to affect the ESP PCI DMA register state, but I suspect you'll need to have a look what the driver is doing using a disassembler/gdbstub and the am53c974 datasheet to try and understand what is happening here.
+
+Finally it may be worth checking the IRQ routing with -trace 'pci*' to see if SeaBIOS updates the PCI "Interrupt Pin" register indicating where it thinks the IRQ should be routed, and stepping through the esp_raise_irq() in QEMU for the final test unit ready command to ensure that all of QEMU, SeaBIOS and AMSIDA.SYS all agree on what IRQ is being used.
+
+I'm looking at this document: http://bitsavers.trailing-edge.com/components/amd/_dataSheets/1993_53c974_PCscsi.pdf 
+
+But I can't find this RSTAT/RINTR register in it. Am I looking at the wrong document, or is there a name mapping to the official names that I'm missing?
+
+The QEMU project is currently moving its bug tracking to another system.
+For this we need to know which bugs are still valid and which could be
+closed already. Thus we are setting the bug state to "Incomplete" now.
+
+If the bug has already been fixed in the latest upstream version of QEMU,
+then please close this ticket as "Fix released".
+
+If it is not fixed yet and you think that this bug report here is still
+valid, then you have two options:
+
+1) If you already have an account on gitlab.com, please open a new ticket
+for this problem in our new tracker here:
+
+    https://gitlab.com/qemu-project/qemu/-/issues
+
+and then close this ticket here on Launchpad (or let it expire auto-
+matically after 60 days). Please mention the URL of this bug ticket on
+Launchpad in the new ticket on GitLab.
+
+2) If you don't have an account on gitlab.com and don't intend to get
+one, but still would like to keep this ticket opened, then please switch
+the state back to "New" or "Confirmed" within the next 60 days (other-
+wise it will get closed as "Expired"). We will then eventually migrate
+the ticket automatically to the new system (but you won't be the reporter
+of the bug in the new system and thus you won't get notified on changes
+anymore).
+
+Thank you and sorry for the inconvenience.
+
+
+[Expired for QEMU because there has been no activity for 60 days.]
+
+
+This is an automated cleanup. This bug report has been moved to QEMU's
+new bug tracker on gitlab.com and thus gets marked as 'expired' now.
+Please continue with the discussion here:
+
+ https://gitlab.com/qemu-project/qemu/-/issues/569
+
+