IBM PS/2 MODEL 35 & 40 (8535, 8540, 9535, 9540)
chipChipset
cpuSockets
PLCC68 PQFP100
speedFSB speed
20MHz
moboForm factor
OEM / Proprietary
dimDimensions
330mm x 218mm
chipCache
None/Integrated in the CPU
ramMax RAM size
16MB
ramRAM type
72-pin FPM
pwrPSU connector
OEM/Proprietary
connI/O ports
1x 
Floppy interface
1x 
IDE interface
cardExpansion slots
2x 
8-bit ISA

Known issues:

  • DALLAS RTC coin cell empty

The motherboard's Real-Time Clock (RTC) chip contains a coin cell that may have drained, causing the loss of CMOS settings. This can result in an inability to save settings, causing system instability or failure to boot. To fix this, the RTC chip can be replaced with an equivalent or repaired by cutting into it and soldering on a new external coin cell holder. Replacement guides are available at https://github.com/necroware/nwX287 or https://github.com/necroware/nw12887, depending on the actual chip used.

Last updated 2024-01-01T15:58:33Z
Board info score is 7/10
chipChipset parts
IBM 64F3110 VLSI VL82C306 IBM 41G3933 IBM 61G3113
chipHuman Interface chips
Intel 8042AH (Keyboard Controller)
cpuCPU family support
0 files available

Vendor: IBM [1 entry]

POST string
Note
Core Ver.
BIOS Ver.
Logs
POST string
Note
Core version
BIOS version
Logs
drv No drivers available
doc 1 board document available
Release date
File
Logs
Release date
File
Logs

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