The Acorn System 1 Monitor

"The System 1 Monitor is contained in two fusible link PROM's (74S571) is very easy to use and provides the following facilities using one of the 8154 devices as a keyboard interface and display driver:

Display indicates data transfer during loading and reverts to reset on successful completion.

The monitor provides a number of useful subroutines which can be inserted in user programs and includes a character font for seven segment representation of the complete ASCII character set.

The System 1 is provided with a Users Manual which includes an introduction to binary numbers, descriptions of the 6502 internal architecture and Acorn hardware, a listing and explanation of the instruction set and monitor program and a step by step introduction to machine code programming complemented by 16 original applications programs."

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