IBM PS/55 Reference, Diagnostic
& Option Disks

Creating and Restoring Floppy Images
Reference & Diagnostic Disks
   PS/55 386 Class
   PS/55 486 Class
   PS/55 "E" 5538
   PC Server 320/520 (MCA/PCI)
   ThinkPad TP720C
   Other Laptops
   Audio & Video
Operating Systems

Ed. 20 Sep 2020: All links are alive again thanks to "Sandy" Sunagawa, a "MAD" from the East.

Disk images for the Personal System/2 (PS/2) line can be found HERE.
Standalone ADF files for Micro Channel adapters can be downloaded HERE.

If you have any other PS/55 files, please Contact Us.

Creating and Restoring Floppy Images

You can create image files of existing floppies or vice versa using one of following programs:

Most ZIP files listed here contain self-extracting EXE files that when executed will create the corresponding floppy disk (Ref, Diags, etc.). Use the following syntax to run the executable:

filename.exe a:

Where "a:" is the letter of the target floppy drive.

Files with the LZH extension are compressed using the LZH algorithm. To extract them use LHA.exe or some modern alternative.

Disclaimer: Some of the files on this page were not tested! Use them at your own responsibility!

Reference & Diagnostic Disks

PS/55 386 Class

File Description Ver. Zipped img. Notes Ref & Diag for 5530-S,T/5540-T/5550-S,T,V/
5570-T,V (and possibly 5545-T)
1.50 ref / diag DOS/V Ref & Diag for 5530/5540/5545/5550/5570 1.36 JDOS
40REF135.EXE Ref for 5540-T [P/N 79F2502] 1.35 JDOS
Wanted Ref for 5530/5540/5550/5570 386DX 1.31 JDOS
30Tstart.exe Start Diskette for 5530-T 1.10 JDOS
30SRE126.EXE Ref & Diag for 5530Z-SX [P/N 57F0058] 1.26 link JDOS
ST30Z100.EXE Start Diskette for 5530Z-SX [P/N 38F6998] 1.00 link JDOS

^ Reference disks for 5530-S/T, 5540-T, 5545-T, 5550-S/T/V, 5570-T/V (386-based)
   Versions 1.00 to 1.2x are basically system-specific. Based on JDOS.
   Versions 1.3x cover all models. Based on JDOS.
   Versions 1.4x and later also cover all models and are based on DOS/V.
   Not sure if Version 1.50 covers Model 5550-V2 or not.
   Non-Japanese users, you'd better use 3070V150 if you have any of the systems above.

File Description Ver. Notes Ref & Diag for 5530-U/V 1.21 / 1.02 DOS/V
30u102d.exe Diag for 5530-U/V [P/N 54G1674] 1.02
Ref for 5530-U 1.10
30v100v.exe Ref Diskette /V for 5530-V 1.00 DOS/V
5530w113.exe Ref for 5530-W (including XGA-1 option) 1.13 DOS/V
5510sre.exe Ref for 5510-S 1.01 DOS/V
5510tref.exe Ref for 5510-T 1.41 DOS/V
5510zref.exe Ref for 5510-Z 1.10 DOS/V Ref/Diag 5535-S0 1.5 DOS/V
5545r133.exe Ref for 5545 (P-70/386 JP version) [P/N 65F0046] 1.33 JDOS
5545UTL.EXE 5545 Utility Diskette [P/N 64F8330] 1.00
REFSPPL.exe Reference Diskette /V Supplement [P/N 07G3119] 1.00

PS/55 486 Class

File Description Ver. Notes Ref & Diag for 5551-N/Y 1.00 Ref & Diag for 5551-N/Y 1.01 Ref & Diag for 5551-N/Y 1.11 Weird (?) Ref & Diag for 5530-L, 5551-R/L, 5521-Y 1.21 Ref & Diag for 5530-L, 5551-R/L, 5521-Y 1.10
51R_fup.lzh Pentium ODP Flash Update for 5551-R 1.30
51R_dig.lzh Diagnostic Diskette for Pentium ODP 5551-R 1.24
51W113R.EXE Reference Diskette for 5551-W/W2 1.13
60W0_110,EXE Reference Diskette for 5560-W0 1.10
60W0120R.EXE Reference Diskette for 5560-W0 1.20
60W111R.EXE Reference Diskette for 5560-W1/W2 (ODP Ready) 1.11 Ref & Diag for Type-B Upgrade (5560-N) 1.00
80y121r.EXE Reference Diskette for 5580-Y 1.21
80W111R.EXE Reference Diskette for 5580-W (P23T Support) 1.11 Ref & Diag for Type-A Upgrade (5580 & 5560) 1.00

Disk images for Types 9595/9585/8595 are omitted from the list and can be found HERE.

PS/55 "E" 5538

File Description Ver. Notes
38videosp.exe 5538 Video Support Diskette (VESA.EXE included)
38util_1.exe 5538 Utility Diskette #1
38util_2.exe 5538 Utility Diskette #2
hbaf55.lzh TP750/755C Audio Driver (CS4248KL) 1.40

PC Server 320/520 (MCA/PCI)

File Description Ver. Notes
rfpcimca.exe Reference Diskette for Server 320/520 PCI/MCA 2.07
rdpcimca.exe Diagnostic Diskette for Server 320/520 PCI/MCA 5.30
4227103.exe 8640 System Board Diagnostics (PCI/MCA) 1.13 Server 720
33l3917.exe 320/520 Micro Channel BIOS Flash Update Disk 29A
3313917.txt Readme for BIOS Flash 29A
mcantsmp.exe 320/520 NT SMP Support Diskette for MC version 1.01
m84h4257.exe 320/520 NT Support Disk for CirrusLogic 5436 video 1.01

ThinkPad TP720C

File Description Ver. Notes Ref & Diag for TP720C Japanese
r720c120.exe Ref Disk for TP720C 1.20 English
dg720120.exe Diagnostic Disk for TP720C 1.20 English
pctpx130.exe PCMCIA Disk for TP720C 1.3 English
Wanted Ref & Diag for C52 486SLC

Other Laptops (PS/55Note)

File Description Ver. Notes
5523R.EXE Ref Disk for PS/55Note N23SX 5523-S1/S2/SV/SA
Attention: This is for the 16 MHz model
1.00 Japanese
5523strt.exe Start Diskette for 5523 N23SX [P/N 07G3763] 1.01 Japanese
Wanted Ref Disk for N23 (5523-S0/SJ) 12 MHz Model Ref Disk for PS/55Note N51SLC (#1 & #2) Japanese
Wanted Ref Disk for N51sx
555BJutl.exe TP555BJ Utility [P/N 66G1298] 1.01 Japanese
555BJvid.exe TP555BJ PCMCIA/VGA Support [P/N 66G8722] 1.00 Japanese


File Description Ver. Notes
XGA2OPTJ.EXE XGA2 Option Diskette, Japanese Japanese
XGA2OPTE.EXE XGA2 Option Diskette, English English
PS55EXST.EXE Option Disk for Personal Storage PS/55 note 720 KB FD
pctpx130.exe EZPLAY for PCMCIA 1.30 PCMCIA Driver for MCA (Sep 1993)
5250126.EXE 5250 Option Diskette [P/N 65X9094] 1.26 2DD
R5250100.EXE Remote 5250 Adapter /A [P/N 23F3996] 1.00 2DD
35FD200.exe 1.2 MB Diskette Support Program 2.01 2DD
35FD121.exe 1.2 MB Diskette Support Program 1.21 2DD
525FDD100.exe External 5.25" FDD /A [P/N 79F5348] 1.00
pcmcia101.exe PCMCIA Adapter /A [P/N 54G0521] 1.01 2DD
2_8memexp.exe 2-8 MB Memory Expansion /A [P/N 23F3242] 1.0 2DD, JDOS
IBMenet.exe PS/55 Network Adapter /A [P/N 35G2811]
10Base2/5 & 10Base5/T
1.24 2DD


IBM FWSR PCI RAID for PC320/520 (DAC960P/PD) Mylex drivers

File Description Ver. Notes
fwpd273.exe DAC960P/PD Firmware update 2.38 to 2.73 2.73
swkit200.exe DAC960P/PD/PL drivers (DOS, OS/2, NT)
WIN95KIT.ZIP DAC960P/PD/PL Win95 beta driver kit DOS drive for Win95 install

IBM First/Wide RAID (PassPlay) without External Port. Use FWSR utility for RAID config.

File Description Ver. Notes
raid199a.exe SR Flash BIOS 1.99

IBM First/Wide Streaming RAID (Cheetah) with an External Port.

File Description Ver. Notes
4305333.exe FWSR Flash BIOS 2.21 2.21
430533.txt FWSR Flash BIOS Readme
4227110.exe FWSR Option Disk #1 2.31
4227111.exe FWSR Option Disk #2 2.31
4227110.txt Readme for FWSR Option Disks

Audio & Video

File Description Ver. Notes
VGA256.EXE VGA256C.sys For TP720C
700c120.exe TP720C Video Driver 1.2
aftps140.exe TP750/755C Audio Driver (CS4248KL) 1.4 English
aftps140.txt Readme for TP750/755C Audio Driver
hbaf55.lzh TP750/755C Audio Driver (CS4248KL) 1.4 Japanese
tp750aud.exe TP750 Audio driver for Win3.1 & OS2 1.3 English
Wanted Win/V by CFC

Operating Systems

File Description Notes
INSTALL PS/55 JDOS 4.04 Install Disk Graeme Roberts
OPERATE PS/55 JDOS 4.04 Operate Disk Graeme Roberts

Content created and/or collected by:
Louis F. Ohland, Peter H. Wendt, David L. Beem, William R. Walsh, Tatsuo Sunagawa, Tomáš Slavotínek, Jim Shorney, Tim N. Clarke, Kevin Bowling, and many others.

Ardent Tool of Capitalism is maintained by Tomáš Slavotínek.
Last update: 08 May 2024 - Changelog | About | Legal & Contact