SAPI-1


The SAPI-1 was a computer produced in the former Czechoslovakia by Tesla since 1980.
It was designed by Eduard Smutný and his brother Tomáš Smutný, and based on the Intel 8080/2 MHz clone. The SAPI-86 was also developed as an 8086 clone of the PC.
The SAPI-1 had a modular construction with modules:
3 versions of SAPI-1 were produced:
integer Micro-Basic was stored in ROM, as well as simple machine code monitor, tape was used as main storage device, using single block recording.
MIKOS with better machine code monitor was stored in ROM, any other programming language was loaded from tape, using blocks of 255 data bytes.
ROM contains CP/M booting sequence, CP/M is booting from 8" Shugart floppy disk drives. Position of VideoRAM was moved from 3800 to E800 to allow CP/M running.
The "Z" version of SAPI-1 ZPS 3 used Z80 processor clone instead of 8080 clone, video with 64 characters per line instead of 40.