Ardent Tool of Capitalism

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Reference
Material		 Software
& Drivers		 IBM
Systems		 Non-IBM
Systems		 MCA
Adapters		 Parts &
Technology		 Setup &
Config

PS/55 Model-Type Chart

Desktop and Tower Systems
Laptops, Notebooks, Lunch Boxes
PS/2 and PS/55 Cross-reference
PS/55 Codenames

Desktop and Tower Systems

Model Type CPU RAM Slots Drive Interface Video
Std. Max. #
Desktop Models
5510 Txx 386DX-20 2/6 MB 14 MB 32-bit x2
16-bit x1		 ESDI VGA for -Tx4
XGA for -Tx8
5510 Sxx 386SX-16 2/6 MB 6 MB 4 ISA x3 VGA
5510 Zxx 286-12 1 MB 5 MB 4 ISA x3 VGA
5521 Y1B 486DX-33 4 MB 32 MB 4 32-bit x5 EIDE DBCS DA /NI-J
5521 YSX/YWB 486SX-33 4 MB 32 MB 4 32-bit x5 EIDE SVGA, CL 28 1 MB
5540 Txx 386DX-20 4 MB 4 32-bit x2
16-bit x1		 ESDI ?
5551 Sxx 386DX-16 8 MB 3 ESDI DA II
5551 Txx 386DX-20 8 MB 3 ESDI DA II
5551 V0x 386DX-25 8 MB 3 ESDI DA II
5551 V1x 386DX-25 8 MB 3 32-bit x2
16-bit x2		 ESDI DA II
5551 V2x 386DX-25 8 MB 3 32-bit x3
16-bit x2		 ESDI DA II
5551 W0x 486SX-20 4 MB 32 MB 4 32-bit x5 Short 16-bit SCSI DBCS DA /J
5551 W2X 486DX2-40 4 MB 32 MB 4 32-bit x5 Short 16-bit SCSI DBCS DA /J
5551 N0A/NAB/NAE 486DX2-66 4-16 MB 32 MB 4 32-bit x5 32-bit SCSI w/c (planar) DBCS DA /J
5551 NXB/NMB 486DX2-66 8-16 MB 32 MB 4 32-bit x5 32-bit SCSI (planar) XGA-2
5551 Yxx 486DX-33 32 MB 4 32-bit x5 32-bit SCSI (planar) DBCS DA /J
5551 R1D 486DX2-66 4 MB 32 MB 4 32-bit x5 EIDE DBCS DA /NI-J
5551 RXD 486DX2-66 8 MB 32 MB 4 32-bit x5 EIDE XGA-2
5551 RXE/RED/RME 486DX2-66 16 MB 32 MB 4 32-bit x5 EIDE + SCSI A/32 XGA-2
5551 L1C 486BL2-66 4 MB 32 MB 4 32-bit x5 EIDE DBCS DA /NI-J
5551 LXC 486BL2-66 8 MB 32 MB 4 32-bit x5 EIDE XGA-2
5551 LEC 486BL2-66 8 MB 32 MB 4 32-bit x5 EIDE + SCSI A/32 XGA-2
5561 W0x 486DX-25 4 MB 64 MB 8 32-bit x6 SCSI A/16 DA-B II
5561 W1x 486SX-25 4 MB 64 MB 8 32-bit x6 SCSI A/32 w/c DA-B II
5561 W2x 486DX2-50 4-8 MB 64 MB 8 32-bit x6 SCSI A/32 w/c DA-B II
5561 Nxx 486DX2-66 8-16 MB 64 MB 8 32-bit x6 SCSI A/32 w/c DA-B II
Tower Models
5571 Sxx
(the first PS/55)		 386DX-16 2 MB 2 32-bit x3
16-bit x5		 ESDI DA
5571 Txx 386DX-20 4 MB 8 MB 2 32-bit x3
16-bit x5		 ESDI DA II
5571 V0x 386DX-25 4 MB 8 MB 2 32-bit x4
16-bit x4		 ESDI DA II
5571 V1x 386DX-25 4 MB 8 MB 2 32-bit x4
16-bit x4		 Long 16-bit SCSI DA II
5580 Yxx 486DX-33 4-8 MB 64 MB 8 32-bit x8 Long 32-bit SCSI w/c DA B-II
5580 W0x 486DX-25 4-8 MB 64 MB 8 32-bit x8 Long 32-bit SCSI w/c DA B-II
5580 W2x 486DX2-50 4-8 MB 64 MB 8 32-bit x8 Long 32-bit SCSI w/c DA B-II
8595 Jxx 486DX-50 16 MB 64 MB 8 32-bit x8 Long 32-bit SCSI w/c DA B-II
9585 5Nx 486DX2-66 8 MB 64 MB 8 32-bit x8 F/W SCSI-2 (planar) XGA-2
9585 5Kx 486DX-33 8 MB 256 MB 8 32-bit x8 F/W SCSI-2 (planar) XGA-2
9595 6Nx 486X2-66 16 MB 256 MB 8 32-bit x8 F/W SCSI-2 XGA-2
9595 5PT Pentium 60 16 MB 256 MB 8 32-bit x8 F/W SCSI-2 XGA-2
9595 5QT Pentium 60 16 MB 256 MB 8 32-bit x8 F/W SCSI-2 XGA-2
9595A 8NT 486DX2-66 16 MB 256 MB 8 32-bit x8 Passplay RAID XGA-2
9595A 8PT Pentium 60 16 MB 256 MB 8 32-bit x8 Passplay RAID XGA-2
9595A 8QT Pentium 66 16 MB 256 MB 8 32-bit x8 Passplay RAID XGA-2
All-in-one Models (similar to 8525 but MCA-based)
5530 S0x 386SX-16 4 MB 16-bit x3 ESDI Stage-I
5530 S1x 386SX-16 6 MB 16-bit x3 ESDI Stage-II
5530 Txx 386DX-20 6 MB 32-bit x3 ESDI
5530 U0x 386SX-20 3 16-bit x4 ESDI XGA
5530 UAx 386SLC-20 3 16-bit x4 ESDI XGA
5530 V0x 386SLC-20 3 16-bit x4 ESDI
5530 V28/VAB/
VX8/VXB		 486SLC2-40 4-8 MB 16 MB 3 16-bit x4 ESDI DA IV
XGA-2 for -VXx
5530 Wxx 486SX-20 4-8 MB 32 MB 4 32-bit x4 Short 16-bit SCSI
5530 W2x 486DX2-40 4-8 MB 32 MB 4 32-bit x4 Short 16-bit SCSI
5530 Lxx 486BL2-66 4 MB 32 MB 4 32-bit x4 EIDE DBCS DA /NI-J
5530 LXC 486BL2-66 4 MB 32 MB 4 32-bit x4 EIDE XGA-2

# - Number of SIMM sockets
Pink colored cells indicate models that are classified as PS/55Z.

For Model 5538 PS/55E, click HERE.

Laptops, Notebooks, Lunch Boxes

Model Name US, EMEA CPU Max. RAM Interface Display
5523 PS/55note N33? 386SX-12 6 MB IDE, AT 9.5" Mono VGA
5523 PS/55note N23SX N33SX 386SX-16 6 MB *1 IDE, AT 9.5" Mono VGA
8551 PS/55note N51SX N51SX 386SX-16 10 MB ESDI, MCA 9.5" Mono VGA
8551 PS/55note N51SLC ? 386SLC-16 10 MB ESDI, MCA 9.5" Mono VGA
5527 PS/55note N27SX CL57SX 386SX-16 16 MB (IC) ESDI, MCA 10.4" TFT, 16C
9552-Y PS/55note C52 486SLC TP700 486SLC-25 16 MB (IC) ESDI, MCA 10.4" TFT, 256C
9552-J TP720C TP720C 486SLC2-50 16 MB (IC) ESDI, MCA 10.4" TFT, 256C
5535-Sxx None 386SX-16 6 MB ESDI, MCA 9.5" Mono VGA
8543 PS/55note L40SX L40SX 386SX-20 18 MB IDE, AT PS/55 Hi-res
5545-T P70-386 386SX-20 MCA Plasma, PS/55 Hi-res

PS/2 and PS/55 Cross-reference

PS/2 PS/55 Notes
8570 5551-S/T/V 5551 is wider than 8570 for 1 added AVE MCA slot
8580 5571 Possibly the same, except for the BIOS ROM
8590/9590 5561 Modified chassis, different planar (6 MCA slots, SIMMs on planar, no XGA, one serial).
8595-xKx 5580-Yxx All 5580 use the 8595 1S1P planar
8595-xMx 8595-Jxx Both the same, except for the BIOS ROM. Type 3 50 MHz complex.
9585 9585 Both the same, except for the BIOS ROM
9595 Type 4 9595-xxx All PS/55 9595 use 2S2P planar and Type 4 complex.
Coding is almost the same.

PS/55 Codenames

Model Codename
Model 5521-Y"Verdy-JR"
Model 5530-U/V"Florence V-ENH"
Model 5530-V"Florence 1/2 (B2SX)"
Model 5530-W"Florence M3"
Model 5551-L/R"Virginia" or "Verdy"
Model 5560-W0"Corvus"
Model 5560-W1"Sofia 2.1"
Model 5560-WN8"Sofia 2.1+3mode"
Model 5580-W"Canberra 2.1"
Model 5580-Y"Albireo"

Source: EMT Reference Disk images

Content created and/or collected by:
Louis Ohland, Peter Wendt, David Beem, William Walsh, 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: 30 Jul 2023 - Changelog | Legal Info & Contact