For comparison here is an original SWTPC MP-C board.
Differences between the Original and Reproduction
The MP-S includes circuitry to allow for use with a teletype. For most systems today this is not necessary and if you simply want a serial interface board we would recommend the PT-S serial board. Assembled MP-S boards ship with an MC68B50 for use in 1MHZ or 2MHZ systems.
Downloads
MP-S AssemblyInstructions.pdf Original SWTPC MP-S instructions
MP-S_Schematic.pdf Original SWTPC Schematic
MP-S-Bare | MP-S Bare Board | $7 |
MP-S-ASM | MP-S Assembled - Only RS232 portion is tested. No testing on teletype and cassette interface | $39 |