Part 3 - Programming in C to access the D+7AIO implementation on the High Nibble S-132

Published: 19 February 2024
on channel: ShadowTron Blog
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In this third video in the series we look at programming against the D+7AIO using the BD Systems C Compiler under CP/M.

I misspeak several times in this video. The A2D used on the S-132/D+7AIO doesn't use an A2D in the ESP32. It uses an A2D on the S-132 PCB. Thanks to the High Nibble for pointing this out.

The emulated D+7AIO provides hardware based analog and digital I/O allowing the emulation to connect to the real world. It provides joysticks and the ability to measure voltages and to provide voltages into actual hardware external to the emulation. It also provides 8 bits of digital I/O.

In the next video we will look at programming the card using BD Systems C compiler under CP/M.

Information on the High Nibble S-132 and IMSAI/Cromemco Emulators.

IMSAI Emulator: https://thehighnibble.com/imsai8080/
Cromemco Emulator: https://thehighnibble.com/cromemcoZ1/
S-132 Emulator: https://thehighnibble.com/s132/

Some resources for learning about the D+7AIO card as it was provided in the 1970s/80s are provided below:

https://bitsavers.org/pdf/cromemco/

https://bitsavers.org/pdf/cromemco/br...

https://deramp.com/downloads/mfe_arch...


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