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karchermkarcherm
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Add patch for ASPI7DOS.SYS
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‎.github/workflows/main.yml‎

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@@ -20,11 +20,14 @@ jobs:
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run: |
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jwasm -Zm -Fo274x-211.obj 274x-211.asm
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jwasm -Zm -Fo284x-101.obj 284x-101.asm
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jwasm -Zm -Foa7-142.obj a7-142.asm
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- uses: actions/upload-artifact@v2
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with:
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name: scsi_edd
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path: |
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274x-211.obj
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284x-101.obj
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a7-142.obj
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bios16k.map
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bios1632.map
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a7-142.map

‎README.md‎

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@@ -4,7 +4,7 @@ Int13 Extension support for Adaptec BIOSes
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How to use it
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-------------
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This repository contains patches for Adaptec SCSI BIOSes (currently for the 2740 and 2840) to support the Phoenix/Microsoft Int13 extensions used to access hard disks above 8GB in LBA mode. To avoid potential copyright problems, this repository does not contain the actual Adaptec BIOSes. Instead, this repository contains an assembler source code file that generates an object file that contains only the locations that need to be overwritten to add Int 13 extension support to the respective BIOS images.
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This repository contains patches for Adaptec SCSI BIOSes and ASPI drivers (currently for the 2740 and 2840) to support the Phoenix/Microsoft Int13 extensions used to access hard disks above 8GB in LBA mode. To avoid potential copyright problems, this repository does not contain the actual Adaptec code. Instead, this repository contains an assembler source code file that generates an object file that contains only the locations that need to be overwritten to add Int 13 extension support to the respective files.
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To apply the patch, you need the assembled form of the patch, which can be generated using MASM or a compatible assembler like Borland's TASM or JWASM. This patch has been tested to assemble correctly on both TASM and JWASM, even though TASM produces a different output because TASM defaults to single-pass mode and the patch contains a non-annotated short forward jump. Both assembled versions are functionally identical. You can also just download the latest GitHub release which includes an assembled object file.
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@@ -17,6 +17,12 @@ Controller | Version | patch object | map file | ROM chip size
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AHA-274x | 2.11 | 274x-211.obj | bios16k.map | 32KB (256kBit)
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AHA-284x | 1.01 | 284x-101.obj | bios1632.map | 64KB (512kBit)
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Furthermore, a patch for the following ASPI driver is included
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Driver | Version | patch object | map file | file size
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-------------|---------|--------------|------------|------------
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ASPI7DOS.SYS | 1.42 | a7-142.obj | a7-142.map | 36160 bytes
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Note that the latest 274x BIOS (2.11) seems to not be available for download from the Adaptec / MicroSemi. Their page has version 2.10. This patch *does not apply to version 2.10*. You can obtain the ROM image by reading it from an controller that has the latest version. The ROM chip is an OTP chip labelled `549306-00 D BIOS 7D00 (c) 1993`.
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You can run `omfpatch 274x-211.bin bios16k.map 274x-211.obj` to create a patched BIOS image for the 2740.

‎a7-142.asm‎

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; Patch for ASPI7DOS.SYS, Version 1.42
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; Copyright (C) 2021 Michael Karcher (the patch, not the ASPI driver itself)
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; This patch may be used and distributed according to the MIT License.
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.386 ; ASPI7DOS already contains 386 stuff, so allow it for the patch, too
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BIOSDriveInfo STRUC
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BD_IsMyDrive db ?
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BD_TargetID db ?
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BD_BusID db ?
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BD_GeometryCX dw ?
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BD_MaxLBA dd ?
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BD_drive_type db ?
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BD_GeometryDH db ?
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BIOSDriveInfo ENDS
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ASPI_CDBRequest STRUC
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ASPI_FunctionNr db ?
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ASPI_StatusCode db ?
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ASPI_HbaID db ?
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ASPI_ReqFlags db ?
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ASPI_Rsvd dd ?
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ASPI_TargetID db ?
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ASPI_Lun db ?
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ASPI_DataLen dd ?
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ASPI_SenseLen db ?
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ASPI_DataBufferPtr dd ?
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ASPI_NextReq dd ?
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ASPI_cdblen db ?
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ASPI_HaStatus db ?
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ASPI_DevStatus db ?
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ASPI_PostFunction dd ?
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ASPI_PostDS dw ?
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ASPI_SRBPtr dd ?
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ASPI_Rsvd2 dw ?
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ASPI_SRBPhysical dd ?
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ASPI_Rsvd3 db 22 dup (?)
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ASPI_CDBdata db 10 dup (?)
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ASPI_CDBRequest ENDS
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EDDData STRUC
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EDDData_rqsize dw ?
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EDDData_count dw ?
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EDDData_ptr dd ?
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EDDData_LBAlow dd ?
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EDDData_LBAhigh dd ?
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EDDData ENDS
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CallerES = 2
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CallerDS = 4
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CallerDI = 6
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CallerSI = 8
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CallerDX = 10
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CallerCX = 12
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CallerBX = 14
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DRIVER SEGMENT USE16
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assume cs:DRIVER
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org 48FAh
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I13R_CurrentDrive LABEL WORD
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org 48FDh
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I13R_Flags LABEL BYTE
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org 4900h
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I13R_ASPICall LABEL ASPI_CDBRequest
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org 4ACAh
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I13_9_OK LABEL NEAR
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org 4BABh
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I13_Unhandled LABEL NEAR
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org 4BB0h
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I13_OutWithAHAndCarry LABEL NEAR
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org 4C10h
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I13R_ExecuteRequest LABEL NEAR
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org 4C81h
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I13R_DoneCallback LABEL NEAR
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org 4CEBh
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I13R_SetStatus LABEL NEAR
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; branch out before clobbering SI and DS
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org 4994h
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cmp ah, 20h
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jbe SHORT I13_Classic
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jmp MaybeI13E
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I13_Classic:
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mov si, cs
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mov ds, si
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org 458Ah
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; Big hole. It seems Adaptec reserved space for 88 BIOSDriveInfo
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; structures instead of just 8 BIOSDriveInfo structures. So there
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; are 80 superflous structures, i.e. 880 bytes.
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Int13E_Dispatch LABEL WORD
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dw OFFSET I13E_checkpresence ; 41h
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dw OFFSET I13E_read ; 42h
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dw OFFSET I13E_write ; 43h
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dw OFFSET I13E_verify ; 44h
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dw OFFSET I13_Unhandled ; 45h (lock/unlock)
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dw OFFSET I13_Unhandled ; 46h (eject)
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dw OFFSET I13E_seek ; 47h
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dw OFFSET I13E_params ; 48h
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MaybeI13E:
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sub ah, 41h
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cmp ah, 7
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ja I13_Unhandled
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push ax
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mov al,ah
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mov ah,0
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add ax,ax
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mov di,ax
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pop ax
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jmp cs:[di + Int13E_Dispatch]
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I13E_checkpresence:
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push bp
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mov bp, sp
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mov word ptr [bp+CallerBX], 0AA55h ; extensions present
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mov ah, 01h ; version 1.x
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mov word ptr [bp+CallerCX], 1 ; support LBA disk calls only
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pop bp
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jmp I13_OutWithAHandCarry
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I13E_params:
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mov di, si
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push ds
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pop es
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mov ax, 1Ah
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cmp word ptr [di], ax
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jnb go_on
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jmp I13_Unhandled
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go_on:
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stosw
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mov ax, 1 ; No 64K DMA limit, no CHS info
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stosw
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dec ax
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mov cx, 6
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rep stosw ; clear CHS fields (not reporting them)
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push eax
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mov eax,0
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mov dl,8
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mov cx,ax
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mov bx,925h
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push es
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push di
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clc
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call MyCDBExecute
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pop di
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pop es
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pop eax
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mov eax, es:[di]
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xchg ah,al
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rol eax,16
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xchg ah,al
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inc eax
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stosd
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xor ax, ax
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stosw ; high 32 bit of max LBA
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stosw
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mov ax, 200h ; sector size
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stosw
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jmp I13_9_OK
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I13E_read:
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mov bx, 928h
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jmp SHORT I13E_rwcommon
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I13E_write:
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mov bx, 112Ah
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I13E_rwcommon:
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stc
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push eax
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call I13E_core
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pop eax
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jmp I13_OutWithAHandCarry
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I13E_verify:
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mov bx, 12Fh
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stc
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push eax
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call I13E_core
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pop eax
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kill_bad_fn:
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jnc SHORT verify_done
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cmp ah, 1
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jne SHORT verify_done
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; no fake verify yet.
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; verify might very well be above 64KB, so Adaptecs idea to
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; "read over the F000 segment" will fail
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is_ok:
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mov ah, 0
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clc
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verify_done:
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jmp I13_OutWithAHandCarry
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I13E_seek:
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test [I13R_flags], 1 ; implies CLC
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jnz is_ok ; ignore seek
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mov bx, 12Bh
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push eax
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call I13E_core
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pop eax
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jmp kill_bad_fn ; MUST change this when fake verify gets
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; implemented
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I13E_core PROC NEAR
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mov eax, [si+EDDData_LBAlow]
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mov dl, 0
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mov cx, word ptr [si+EDDData_Count]
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les di, [si+EDDData_Ptr]
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MyCDBExecute LABEL NEAR
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push ds
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push si
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push cs
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pop ds
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ASSUME ds:DRIVER
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mov si, OFFSET I13R_ASPICall
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mov word ptr [si+ASPI_DataBufferPtr], di
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mov word ptr [si+ASPI_DataBufferPtr+2], es
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sbb di, di ; CF set on entry: allow length
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and di, cx
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xchg di, cx
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add di, di ; sector count to 256-byte-count
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mov byte ptr [si+ASPI_DataLen], dl
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mov word ptr [si+ASPI_DataLen+1], di
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mov byte ptr [si+ASPI_DataLen+3], 0
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xchg ah,al
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ror eax,16
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xchg ah,al
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mov dword ptr [si+ASPI_CDBdata+2], eax
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xchg ch,cl
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mov word ptr [si+ASPI_CDBdata+7], cx
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mov [si+ASPI_FunctionNr], 2
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mov [si+ASPI_ReqFlags], bh
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mov [si+ASPI_CDBlen], 10
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mov [si+ASPI_SenseLen], 14
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mov [si+ASPI_CDBdata], bl
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mov [si+ASPI_CDBdata+1], 0
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mov [si+ASPI_CDBdata+6], 0
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mov [si+ASPI_CDBdata+9], 0
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mov word ptr [si+ASPI_PostFunction], OFFSET I13R_DoneCallback
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mov word ptr [si+ASPI_PostFunction+2], cs
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mov bx, [I13R_CurrentDrive]
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mov al, [bx+BD_TargetID]
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mov [si+ASPI_TargetID], al
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mov al, [bx+BD_BusID]
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mov [si+ASPI_HbaID], al
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mov [si+ASPI_LUN], 0
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call I13R_ExecuteRequest
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call I13R_SetStatus
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pop si
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pop ds
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ret
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I13E_core ENDP
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org 53h
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;db "Version 1.42"
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db "V1.42+EDD1.0"
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org 4FB5h
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db "V1.42+EDD1.0"
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DRIVER ENDS
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END

‎a7-142.map‎

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DRIVER 0 0 36160

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