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Cromemco TU-ART Board  
This was the main I/O board Cromemco utilized for their systems to communicate with the printer or CRT terminal(s).

Cromemco TU-ART

The TU-ART (Twin Universal Asynchronous Receiver and Transmitter) provided two channels of duplex serial data exchange; two channels of parallel data exchange; and ten interval timers. Status information was available through polling or via interrupt. In addition, each interval timer activated an interrupt and two interrupt request lines were brought out for the user. The TU-ART has its own crystal-controlled clock and interfaces to the S-100 bus asynchronously so that CPU clock frequency was not critical. The board incorporated two TMS 5501 NMOS I/O Controller chips. The only problem with the board was that it ate up a big chunk of the 256 byte system I/O address space.  Below is table of the essential requirements.   


TU-ART Ports


Also the board was quite tricky to program/interface particularly for interrupts.  If you are using this board take care also you connect the right pins on the top edge connector to what you require. The TDL SMB for example required only 2 ports per I/O function.
The manual for this board can be obtained here



Other Cromemco S-100 Boards
ZPU  SBC   4KRAM  16K RAM  64KZ RAM  64KZ-II RAM  256KRAM  8KBytesaver  Bytesaver-II  
16KPROM  32K Bytesaver  4FDC   16FDC  64FDC  WDI  WDI-II   STDC   DPU
4PIO   8PIO   TU-ART  D+7A I/O   Dazzler  PRI   GPIB Board   XMU  XXU  Other Boards


This page was last modified on 10/25/2013