MITS Altair 8800 1K Static RAM Board Rev 0 Low Serial Number REPAIRED WORKING For Sale

MITS Altair 8800 1K Static RAM Board Rev 0 Low Serial Number REPAIRED WORKING
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MITS Altair 8800 1K Static RAM Board Rev 0 Low Serial Number REPAIRED WORKING:
$52.00

For sale is a repaired, tested, and fully working MITS 1K static RAM board. This is the original Altair 8800 RAM board, used with the first run of Altair 8800 computers. This board is fully populated with 8x 2101 256 x 4 static RAMs. Two are Intel (likely the originals from the MITS parts kit), the rest are National Semiconductor. This is a fairly low serial number board -- the very earliest examples of the 1K RAM board I've seen do not have a serial number, and it is unknown whether MITS started at zero. The yellow silkscreen and lack of gold edge connector plating indicate that this board is early MITS production.

Repairs and Testing

This board's address jumper area was in poor condition. It was repaired, and the soldered wire links were replaced with machine pin sockets, which make it easy to re-address the board without further stressing it through soldering/desoldering. After repair, it was tested using the Dajen SCI monitor's quick RAM test, and more extensively by loading code into it and executing at full speed.

The board is currently jumpered for addresses 0x0000 - 0x03FF, which is the start of 8080 memory. This is the correct addressing if the board is the only board in a system, or the first board installed in your Altair. If you require another address, let us know at checkout and we'll rejumper the board for you, and run the memory tests at the new location.

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