IBM 5150 CPU Board

Опубликовано: 16 Февраль 2026
на канале: Computing Mongoose

532

An in-depth look at the IBM PC 5150 CPU board (the main board, or mother board). I'm presenting the different integrated circuits on the board (Direct Memory Access - DMA, Programmable Interrupt Controller - PIC, Programmable Peripheral Interface - PPI), the two switch block settings, the jumper for the cassette output, speaker connector, keyboard and cassette connectors. I'm looking at different datasheets associated with the chips.

IBM 5150 Technical Reference https://usermanual.wiki/m/e1ac71a8585...

Memory chip TMS4164-20NL https://www.datasheets360.com/pdf/719...

Multimode DMA Controller AM9517A http://www.bitsavers.org/components/a...

Programmable Interrupt Controller (PIC) P8259A https://datasheetspdf.com/pdf-file/63...

Programmable Peripheral Interface (PPI) P8255A-5 https://pdf1.alldatasheet.com/datashe...

SN74LS245N OCTAL BUS TRANSCEIVERSWITH 3-STATE OUTPUTS https://pdf1.alldatasheet.com/datashe...

SN74LS373N OCTAL D-TYPE TRANSPARENT LATCHES AND EDGE-TRIGGERED FLIP-FLOPS https://pdf1.alldatasheet.com/datashe...

Jumper settings:
https://www.minuszerodegrees.net/5150...
https://www.minuszerodegrees.net/5150...