Professional Electronics

109 Chesney Ln., Columbia, SC 29209


Programmable 8255 PIA. Space for analog-to-digital converter, relays, clock chip, etc. Expansion connector for RAM pack.
ZX80 TS 1000
Uses ports A and B of the I/O board. Printer commands and machine language programs are stored in an 8K memory area not used by computer. Professional Electronics I/O board required.
TS 1000
Service to store BASIC or machine language programs in EPROMs. For use with Professional Electronics’ printer interface board.
TS 1000




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