Alpha Micro - AM-300 Six Channel Serial I/O Board
This board came out in 1977. Again quite advanced for the
time when most serial boards had only 2 serial ports. It is now quite a rare
The board was claimed to be S-100 compatible. (This needs to be confirmed
since their AM-100 CPU
was not). It
had six RS-232 I/O ports with 16 selectable baud rates each under software
control. The maximum rate was 19,200 baud. The board utilized
six Western Digital UARTS (UC1617B's) for both Synchronous and Asynchronous
modes of operation. Five I/O ports were used for data and control.
There was also multi level interrupt capability on the board.
The board was clearly designed for an efficient multiuser serial I/O system.
If anybody has a better picture of this board please let me know.
Unlike their AM-100 manual the manual for this board while adequate was
minimal and can be obtained
I recently obtained a second more detailed manual which can be obtained
This page was last modified