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IBM PC 5150
The System
- IBM PC 5150 in mint condition
- 16k-64k motherboard with v2 BIOS - P/N 184041XM413 - S/N 0216354
- Dual full height 320k floppy drives
- IBM floppy controller - P/N 1809121 XM 42
- IBM MDA and parallel port - P/N 1804057 362XM
- IBM power supply - P/N 1800841
- Everex EV-138 memory card with 576K (maxed)
- IBM 5151 monitor
- Keyboard
- Original purchase invoice from 1982!
- IBM DOS 3.3
[](20160131-ibm-5150-system.jpg)
Log
- *20110223** Purchased from [Vintage Computer Marketplace](http://marketplace.vintage-computer.com) from the original owner. I learned after bidding that if it hadn't sold, it was destined for the big electronics grinder in the sky. So sad!
- Disassembled, cleaned, and reassembled everything. Both floppy drives work. Motherboard has the
v2 BIOS, which does not support hard drives, and does not sense switch 5 of SW2 which limits it to 544KB of RAM. Cleaned latex paint off power cords etc with rubbing alcohol. Cleaned floppy drives.
- Glued monitor case cracks with E6000. The back shell of the monitor is somewhat brittle but this
stabilized it.
- Replacement cork pads from Lorne on http://marketplace.vintage-computer.com/ Besides the monitor cracks, everything seems to function correctly.
Switches
http://www.minuszerodegrees.net/5150/misc/5150_motherboard_switch_settings.htm
SW1 01000001
http://www.minuszerodegrees.net/5150/ram/5150_ram_16_64_SW2.jpg
SW2 00000000
TODO
Items on the original invoice that I am missing:
Should the BIOS be upgraded?
BIOS
My machine has the v2 BIOS. This BIOS only recognizes up to 544KB RAM, and does not support hard
drives.
References
- [IBM 51xx PC Family Computers](http://www.minuszerodegrees.net/index.htm)
- [Description at old-computers.com](http://www.old-computers.com/museum/computer.asp?st=1&c=274)