Technical Design Labs ZPU Z80 S-100 Processor Board CPU TDL Altair IMSAI TESTED For Sale
Technical Design Labs ZPU Z80 S-100 Processor Board CPU TDL Altair IMSAI TESTED:
For sale is a Technical Design Labs (TDL) ZPU processor board for S-100. This board was one of the very first Z80 implementations on S-100. The ZPU is one of the very few Z80 processor boards that is compatible with the Altair 8800, and includes front panel connectors for both Altair and IMSAI style front panels!
This board required very minimal repair. Several bypass capacitors were split and required replacement (we stock an exact replacement for this part, it's indistinguishable from the originals). It has been fully tested and burned in at 2 MHz in one of our IMSAI 8080 systems. The Altair front panel header had bent pins, which were straightened. One 8T98/74LS367 buffer was dead and had to be replaced (U8).This board has a very rare Mostek white ceramic Z80 installed in it. Mostek was a second source for Zilog, and this one dates from the 20th week of 1977.