Altair 8800b Turnkey Controller Card For Sale
- Hello, I have a very nice Altair 8800b Turnkey Controller Card for sale. It is required for the operation of an Altair 8800b Turnkey Computer. The card was pulled from a working system. I am asking $250 or Best Offer. My email is: jwstrand@...
I can email you pictures of the card on request. Thanks!
- The Turnkey Module is my favorite Altair board. The board provides a serial port and auto start logic & four 1702A prom sockets. Unmodified Rev. 0 boards have 1K of RAM for the monitor stack. Modified boards allows a full 64K RAM after booting. Board addresses are set using switches, no soldering required.
An MWRITE jumper allows the board to work in a front panel machine. I haven't tested it, but that may include the 8800/8800a.
The Turnkey computer is plain, but the board is fancy and makes the Altair one of the few 64K S-100 machines. Altairs without this board cannot run Altair accounting software. The Altair accounting software shows the extra RAM has a dramatic effect on BASIC speed. The increase is mostly in string processing garbage collection.
W. Tom S.
But note, that the TurnKey board decodes the addresses A8-A15 for its I/O devices.
So with most Z80 CPUs it doesn't work.
I have done a modification for this, leaving the board original.