IBM SCSI Microcode Versions

8032 microcontroller-based SCSI Controller uCode Versions
80188 microprocessor-based SCSI Controller uCode Versions
80186 microprocessor-based SCSI Controller uCode Versions

Written by David Beem:

Hidden away on one of the support diskettes, IBM has a small program named SCSILEVL.COM. It reports the microcode firmware version on most of the different IBM SCSI controllers used on microchannel (MCA) PS/2s (This page does not cover the SCSI RAID controllers that IBM had on it's server models nor the re-branded Future Domain controller IBM called the Patriot). Besides being a little too simplistic for my tastes, the program doesn't work on a few IBM models (Industrial Gearbox 800 & 8556/8557 & 9556/9557 PS/2s) that have SCSI implemented on the system planar.

I intend to expand the program somewhat, as well as document how it works. Most of the code is fairly easy to understand for those fluent in Assembler. For some sections you may have to see a debugging program (like Microsoft's CodeView for DOS) single-step through the code on a system with IBM SCSI. I recommend running the programs only in a pure DOS environment!

The original SCSILEVL.COM program doesn't even check if it is running on a MCA system (the things IBM takes for granted)! I just find some areas worth improving, mainly to make it check all the IBM SCSI microcode versions. The interface can also be changed to be more grammatically correct (i.e. not identifying a planar SCSI controller as being on a "slot").

SCSILEVL.COM - IBM's original version
SCSILEVL.DIS - The original version disassembled
SCSILEVL.COM - My updated version (Coming soon)

IBM made three different families of non-RAID microchannel SCSI controllers, mainly distinguished by the microcontroller or microprocessor of the circuit that controlled the SCSI bus. Even though some of the controllers could use the same microcode firmware, I have separated them by how I see those series laid out. The functionality among the families is largely the same, with the members having similar capabilities.

I don't profess to know what the different microcode versions added or fixed, but it is helpful to know if there is a later version for an upgrade (I will have some microcode images of the non-Flash series up soon so you can burn your own EPROMs if you have the equipment). Generally it is advised to have the latest firmware possible. I have charted all the versions I have found so far. If you have an unlisted version or one marked as unknown, please notify me to add it.

8032 microcontroller-based SCSI Controller Code Versions

    Based on the Intel-designed 8032 microcontroller. It is "Narrow" SCSI able to do a 5Mbps transfer rate. All models of this series have no controller cache. The microcode is on a single 64Kb x 8-bit EPROM. When the series was renumbered to version 02 and 03, it supports the SCSI-2 command set.

EPROM FRU
Microcode
Copyright
Location
64F1368
0Fh/15d
1989
ZM5 of  Tribble, FRU 15F6561/85F0002
79F3212
0Fh/15d
1990
P75 planar  "uCode"
64F5801
10h/16d
1990
ZM5 of  Tribble, FRU 15F6561/85F0002
84F8233
12h/18d
1990
ZM5 of  Tribble, FRU 15F6561/85F0002
84F8233
12h/18d
None
U4 of  Short SCSI 16/A, FRU 07G3169
10G7174
13h/19d
1990
ZM5 of  Tribble, FRU 15F6561/85F0002
41G9974
14h/20d 
1992
ZM5 of  Tribble, FRU 15F6561/85F0002
54G1800
26h/38d
1993
U5 of  Short SCSI /A, FRU 66G1080
39G3313
02h/02d
1992
U22 on  9556/9557 planar
92F1211
03h/03d
1990
U36 on  8556/8557 planar
39G6419
03h/03d
1992
U22 on  9556/9557 planar
49G2704
03h/03d
1992
U3 on Thinkpad 700/700C/720/720C  3550-002 Expansion Unit System Board, FRU 49G2667

80188 microprocessor-based SCSI Controller uCode Versions

    Based on the Intel-designed 80188 microprocessor. It is "Narrow" SCSI able to do a 5Mbps transfer rate. Most models of this series have a base 512Kb controller cache, some expandable to 2Mb using proprietary IBM SIMMs. The microcode is on a single 64Kb x 8-bit EPROM.

EPROM FRU
Microcode
Copyright
Location
64F1333
Unknown
Unknown
U47 of  "Old" Spock, FRU 84F8149
33F5546
07h/07d
1988, 1989
U47 of  "Newer" Spock, FRU 85F0063
57F2423
08h/08d
1989
U43 of  Gearbox 800 Drives Module
57F2716
09h/09d
1990
U43 of  Gearbox 800 Drives Module
64F5984
09h/09d
1990
U47 of  "Old" Spock, FRU 84F8149
64F5984
09h/09d
None
U10 of  "2/3 Length SCSI 32/A", FRU 95F4488
10G4890
25h/37d
1991
U47 of  "Newest" Spock, FRU 85F0063
10G4890
25h/37d
None
U12 of  "Short SCSI 32/A with Cache", FRU 35G2818
10G4890
25h/37d
None
U9 of  "SCSI 32/A with 2.5 HD" , FRU 35G3785
10G4891
25h/37d
None
U12 of  "Short SCSI 32/A, FRU 07G3063
39G2066
25h/37d
1992
U20 of  9576/9577 Bermuda planar
39G2066
25h/37d
1992
U51 of  9585 'X' planar
61G2976
26h/38d
1993
U47 of  "Newest" Spock, FRU 85F0063

80186 microprocessor-based SCSI Controller uCode Versions

    Based on the Intel-designed 80186 microprocessor. It is "Fast/Wide" SCSI able to do a 20Mbps transfer rate. All models of this series have no controller cache. The microcode is on two Flash 32Kb x 8-bit chips able to be upgraded with software.

REV71UPD.EXE - SCSI-2 Fast/Wide Firmware Rev 7.1
corv77.EXE - SCSI-2 Fast/Wide Firmware Rev 7.7

Flash FRU
Microcode
Copyright
Location
61G3929/30
57h/87d
1993
U1 & U2 of  Corvette, FRU 92F0160
61G3929/30
57h/87d
1993
U139 & U140 of  9585 'K' or 'N' planar
61G3929/30
58h/88d
1993
U1 & U2 of  Corvette, FRU 92F0160
61G3929/30
58h/88d
1993
U139 & U140 of  9585 'K' or 'N' planar
61G3929/30
58h/88d
1993
U1 & U2 of  Differential F/W or RS/6k "4-6" adapter, FRU 11H3599 or 11H7660
61G3929/30
71h/113d
1993
U1 & U2 of  Corvette, FRU 92F0160
61G3929/30
71h/113d
1993
U139 & U140 of  9585 'K' or 'N' planar
61G3929/30
71h/113d
1993
U1 & U2 of  Differential F/W or RS/6k "4-6" adapter, FRU 11H3599 or 11H7660
61G3929/30
73h/115d
Unknown
U1 & U2 of  Differential F/W or RS/6k "4-6" adapter, FRU 11H3599 or 11H7660
61G3929/30
74h/116d
N/A
U1 & U2 of RS/6000-marked 4-7 Corvette, FRU 11H3600
61G3929/30
74h/116d
N/A
U1 & U2 of  Differential F/W or RS/6k "4-6" adapter, FRU 11H3599 or 11H7660
61G3929/30
75h/117d
"12/97"
U1 & U2 of RS/6000-marked 4-7 Corvette, FRU 93H8814
61G3929/30
77h/119d
1994
U1 & U2 of  Corvette, FRU 92F0160
61G3929/30
77h/119d
1994
U139 & U140 of  9585 'K' or 'N' planar
61G3929/30
77h/119d
1994
U1 & U2 of  Differential F/W or RS/6k "4-6" adapter, FRU 11H3599 or 11H7660
88G1094/95
C5h/197d
Unknown
U1 & U2 of  Enhanced Differential F/W or RS/6k "4-C" adapter, FRU 52G3380
88G1094/95
C6h/198d
Unknown
U1 & U2 of  Enhanced Differential F/W or RS/6k "4-C" adapter, FRU 52G3380
88G1094/95
C7h/199d
Unknown
U1 & U2 of  Enhanced Differential F/W or RS/6k "4-C" adapter, FRU 52G3380
61G3929/30
C9h/201d
1993
U1 & U2 of  Corvette, FRU 92F0160
88G1094/95
C9h/201d
1995
U1 & U2 of  Enhanced Differential F/W or RS/6k "4-C" adapter, FRU 52G3380

Last updated 28 Dec 2011 by David L. Beem


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