ZMJC Computer: Difference between revisions
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| Line 14: | Line 14: | ||
!Pin | !Pin | ||
!Function | !Function | ||
|- | |- | ||
|+CON1: ADC/DAC | |+CON1: ADC/DAC | ||
| Line 32: | Line 31: | ||
|- | |- | ||
|8|| ||h|| | |8|| ||h|| | ||
|} | |} | ||
| Line 40: | Line 37: | ||
=== CON3 (RS232) === | === CON3 (RS232) === | ||
= | {| class="wikitable" | ||
!Pin | |||
!Function | |||
!Pin | |||
!Function | |||
|- | |||
|+CON4: Power | |||
|1||+5 V DC||a||+5 V DC | |||
|- | |||
|2||0 V||b||0 V | |||
|- | |||
|3|| ||c|| | |||
|- | |||
|4|| ||d|| | |||
|- | |||
|5|| ||e|| | |||
|- | |||
|6|| ||f|| | |||
|- | |||
|7|| ||g|| | |||
|- | |||
|8|| ||h|| | |||
|} | |||
Jumpers: | |||
* RESET: Closes to reset | |||
* RAMSIZE: 8 HB or 32 KB/128 KB | |||
== Circuit Description == | == Circuit Description == | ||
Revision as of 11:15, 14 July 2024
Introduction
During my MSc in Electronic Engineering at The University of Nottingham (1992-3) we used this single boad computer for an assembly programming module. It must have been designed by one of the university staff, but I don't know who; it is just labelled "© 1991 MJC". Hence, I will refer to this as the zMJC Computer. I lost the schematic many years ago.
It is intended that this page will ultimately document the schematic and repoducible PCB layout after I have reverse engineered it.
Connectors, options and Ports
CON1 provides connection to the ADC and DAC options.
| Pin | Function | Pin | Function |
|---|---|---|---|
| 1 | a | ||
| 2 | b | ||
| 3 | c | ||
| 4 | d | ||
| 5 | e | ||
| 6 | f | ||
| 7 | g | ||
| 8 | h |
CON2 (Expansion)
CON3 (RS232)
| Pin | Function | Pin | Function |
|---|---|---|---|
| 1 | +5 V DC | a | +5 V DC |
| 2 | 0 V | b | 0 V |
| 3 | c | ||
| 4 | d | ||
| 5 | e | ||
| 6 | f | ||
| 7 | g | ||
| 8 | h |
Jumpers:
- RESET: Closes to reset
- RAMSIZE: 8 HB or 32 KB/128 KB
Circuit Description
TBC
Software
TBC