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Alspa Computer
ACI-1 / 2

The Alspa ACI-2 is an integrated CP/M system. The chassis houses one 8” full height floppy drive (the ACI-1) or two half-height drives (making it an ACI-2).

While the machine at first appears to be an external drive box, there’s a single-board Z80 computer mounted below the disk drive(s) that provides for a full, integrated CP/M system.

The ACI-2 single-board computer includes a 4 MHz Z80, 64K of dynamic RAM, boot ROM, a double density floppy controller, three 8251A serial ports, and options for a parallel port, battery-backed RTC, and Corvus hard disk interface.

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I believe I have an ACI-1, but with a single half-height drive. It was sold as a turn-key telephone management system, so the labels on the front were applied by that vendor. However, there is an Alspa logo on the back. The last time I tried powering on this system, I couldn''t get anything displayed on the terminal, but I was using a laptop connected via a usb-serial adapter and that may have been an issue. To verify that the adapter worked, I was able to connect a modem and I was able to issue AT commands. Taking DTE/DCE considerations into mind, I still wasn''t able to get the display to work. Previously (i.e., years earlier) I was able to start the system, but the POST indicated bad RAM. Since the RAM was surface mounted, I was going to junk the system and at that time the documentation was discarded. Long story short... any idea where I can get hardware documention for this system? TIA.

Wednesday 28th September 2022
Allan Ayres (Canada)


NAME  ACI-1 / 2
MANUFACTURER  Alspa Computer
TYPE  Professional Computer
YEAR  1981
CPU  Zilgo Z80
RAM  64 Kb
ROM  boot ROM
TEXT MODES  80 x 25
COLORS  Monochrome display
SOUND  Beeper ?
I/O PORTS  3 x 8251A serial ports, parallel port (optional), Corvus hard disk interface (optional)
BUILT IN MEDIA  one 8'' full height floppy disk (ACI-1) or two 8'' half-height floppy disks (ACI-2)

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