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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

[![IBM 5150](20160131-ibm-5150-system-sm.jpg)](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!

*20150829**

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:

IBM DOS 1.1

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)