PS/55 File Collection

Ed. Tom (20 Sep 2020): I've contacted Sandy (the original author of the PS/55 pages) regarding the previously broken file links, and to my amazement, he was able to find most of the lost files... even after all these years. I've sourced the few last missing files from some other places. So I'm happy to announce that all files linked below are alive again! Special thanks to our PS/55 hero - Sandy.

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 (without the quotes):

   "filename.exe a:" (where "a:" is 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
   PS/55 486 Class
   PS/55 "E" 5538
   PC Server 320/520 (MCA/PCI)
   PC720 6860 (PCI/MCA)
   PC750 6886 (PCI/MCA)
   ThinkPad TP720C
   Other Laptops
   Audio & Video

Reference & Diagnostic Disks

PS/55 386 Class

File Description Ver. Size Notes Ref & Diag for 5530-S,T/5540-T/5550-S,T,V/
5570-T,V (And probably 5545-T).
1,50 862 KB DOS/V Ref & Diag for 5530/5540/5545/5550/5570 1.36 839 KB JDOS
40REF135.EXE Ref for 5540-T [P/N 79F2502] 1.35 567 KB JDOS
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 JDOS
ST30Z100.EXE Start Diskette for 5530Z-SX [P/N 38F6998] 1.00 JDOS

** Reference diskette for 5530-S/T, 5540-T, 5545-T, 5550-S/T/V, 5570-T/V (386 series)
Versions 1.00 to 1.2x are basically system dependent. Based on JDOS.
Versions 1.3x covers all models. Based on JDOS.
Versions higher than 1.40 are based on DOS/V and covers all models.
Not sure if Ver. 1.50 covers 5550-V2 or not.

** For non-Japanese, you'd better use 3070V150 if you have any of designated system.

File Description Ver. Size Notes Ref & Diag for 5530-U/V 1.21 / 1.02 782 KB 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 DOS/V
5510tref.exe Ref for 5510-T DOS/V
5510zref.exe Ref for 5510-Z 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. Size Notes Ref & Diag for 5551-N/Y 1.00 874 KB Ref & Diag for 5551-N/Y 1.01 Ref & Diag for 5551-N/Y 1.11 920 KB Wierd Ref & Diag for 5530-L, 5551-R/L, 5521-Y 1.21 856 KB Ref & Diag for 5530-L, 5551-R/L, 5521-Y 1.10 852 KB
51R_fup.lzh BIOS FLASH Update for 5551-R (for PODP) 1.30 539 KB
51R_dig.lzh Diagnostic Diskette for PODP Flashed 5551R 1.24 423 KB
51W113R.EXE Reference Diskette for 5551-W/W2 1.13 713 KB
60W0_110,EXE Reference Diskette for 5560-W0 1.10 749 KB
60W0120R.EXE Reference Diskette for 5560-W0 1.20 695 KB Not tested
60W111R.EXE Reference Diskette for 5560-W1/W2 (ODP Ready) 1.11 703 KB Ref & Diag for Type-B Upgrade (5560-N) 1.00 854 KB
80y121r.EXE Reference Diskette for 5580-Y 1.21 721 KB
80W111R.EXE Reference Diskette for 5580-W (P23T Support) 1.11 Ref & Diag for Type-A Upgrade (5580 & 5560) 1.00 917 KB

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

PS/55 "E" 5538

File Description Ver. Size Notes
38videosp.exe 5538 Video Support Diskette (VESA.EXE included) 1167 KB
38util_1.exe 5538 Utility Diskette # 1 641 KB
38util_2.exe 5538 Utility Diskette # 2 604 KB
hbaf55.lzh TP750/755C Audio Driver (CS4248KL) 1.40 1092 KB

PC Server 320/520 (MCA/PCI)

File Description Ver. Size Notes
rfpcimca.exe Reference Diskette for Server 320/520 PCI/MCA 2.07 726 KB
rdpcimca.exe Diagnostic Diskette for Server 320/520 PCI/MCA 5.30 289 KB
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

PC720 6860 (PCI/MCA)

File Description Ver. Size Notes
720r101.exe Reference Diskette 1.01 Japanese
720d101.exe Diagnostic Diskette [84G7602] 1.01
720u101.exe UtilityDiskette [84G7622] 1.01 Japanese
720s101.exe Support Diskette [84G7604] 1.01 Japanese
Video Support for OS/2 (S3-V864) Japanese
Video Support for Windows (S3-V864) Japanese
pc720sp.lzh BIOS Flash up for PC720 6860 (PODP) 1.10 484 KB Japanese
6860ref.lzh Reference Diskette for PODified 6860 1.10 888 KB Japanese
6860dig.lzh Diagnostic Diskette for PODified 6860 1.11 581 KB Japanese

PC750 6886 (PCI/MCA)

File Description Ver. Size Notes Ref & Diag for PC750 6886 (PCI/MCA) 1.00 959 KB Japanese
n2mt28a.exe Reference Diskette for 6876/86 715 KB English
687686DG.EXE Diagnostic Diskette for 6876/86 263 KB English
n2jt50a.exe BIOS FLASH for 6886/6876 v50a
n2jt50a.txt Readme for BIOS v50a
n2jt52a.exe BIOS FLASH for 6886/6876 v52a
n2jt52a.txt Readme for BIOS v52a
750QA523.EXE QaPlusPro Diag for 68XX 5.23 693 KB English
700QA542.EXE QaPlusPro Diag for PC300/700 series 5.42B 739 KB English

ThinkPad TP720C

File Description Ver. Size Notes Ref & Diag for TP720C 1.283 KB 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. Size Notes
5523R.EXE Ref Disk for PS/55Note N23SX 5523-S1/S2/SV/SA
Attention: This is for the 16 MHz Model
1.00 653 KB 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) 761 KB 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. Size Notes
XGA2OPTJ.EXE XGA2 Option Diskette, Japanese 231 KB Japanese
XGA2OPTE.EXE XGA2 Option Diskette, English 921 KB English
PS55EXST.EXE Option Disk for Personal Storage PS/55 note 129 KB 720 KB FD
pctpx130.exe EZPLAY for PCMCIA 1.30 511 KB PCMCIA Driver for MCA (Dated Sep. 1993) 74 KB
5250126.EXE 5250 Option Diskette [P/N 65X9094] 1.26 2DD
R5250100.EXE Remote 5250 Adapter /A [P/N 23F3996] 1.00 2DD
5250 PCM1
5250 PCM2
3270 Option Diskette
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. Size Notes
fwpd273.exe DAC960P/PD firm ware update 2.38 to 2.73 2.73 178 KB
swkit200.exe DAC960P/PD/PL drivers (DOS,OS/2,NT) 5.08 MB
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. Size Notes
raid199a.exe SR Flash BIOS 1.99

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

File Description Ver. Size Notes
4305333.exe FWSR Flash BIOS 2.21 2.21 315 KB
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. Size Notes
VGA256.EXE VGA256C.sys For TP720C 254 KB
700c120.exe TP720C Video Driver 1.2 249 KB
aftps140.exe TP750/755C Audio Driver (CS4248KL) 1.4 828 KB English
aftps140.txt Readme for TP750/755C Audio Driver
hbaf55.lzh TP750/755C Audio Driver (CS4248KL) 1.4 1092 KB Japanese
tp750aud.exe TP750 Audio driver for Win3.1 & OS2 1.3 795 KB English
Wanted Win/V by CFC


File Description Size Notes
5x86REGE.ZIP Spreadsheet of HEX values for ET586 8.61 KB Nifty ID: F355
5x86reg.lzh The original spreadsheet written in Japanese 8.92 KB Nifty ID: F355
ET9603.EXE *1 Evergreens Cache enabler ET586 for Cyrix 5x86 and other
related programs (Including ETDIAG.exe)
Also contains cache enabler for DOS, OS/2 Warp and NT.
623 KB Evergreen Tech
5x86c2.ZIP Cache Enabler for Cyrix 5x86
Contains cache enabler for DOS, OS/2 Warp
18 KB Peter Moss
SGS4191.PDF Data Book of TI5x86 (and Cyrix 5x86) 326 KB SG Thomson Unknown (Blue Lightning speed utilities?) 6.57 KB IBM

*1 Execute the file with -d (or /d) option to create a complete install diskette with sub directories.

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

Ardent Tool of Capitalism - MAD Edition! is maintained by Tomáš Slavotínek.
Last update: 19 Nov 2021 - Changes & Credits | Legal Info & Contact