IBM PS/2 MODEL 55SX & 55LS (8555) (Late)
16MHz
OEM / Proprietary
330mm x 218mm
1x
Floppy interface
1x
Parallel
1x
Serial
3x
16-bit MCA
1x
AVE (MCA)
Also known as:
- IBM 27F4667
- IBM 57F1536
- IBM 57F3003
- IBM 84F6889
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.
Notes:
Further info: https://www.ardent-tool.com/8555/Planar.html
Last updated 2024-01-01T13:34:24Z
Board info score is 6.8/10
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