https://wiki.theretrowagon.com/w/index.php?action=history&feed=atom&title=S-100_Mini_Front_PanelS-100 Mini Front Panel - Revision history2026-05-18T07:22:08ZRevision history for this page on the wikiMediaWiki 1.30.0https://wiki.theretrowagon.com/w/index.php?title=S-100_Mini_Front_Panel&diff=659&oldid=prevJeffa: Add categories2016-12-01T14:26:43Z<p>Add categories</p>
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</table>Jeffahttps://wiki.theretrowagon.com/w/index.php?title=S-100_Mini_Front_Panel&diff=658&oldid=prevJeffa: Initial Creation2016-12-01T00:35:31Z<p>Initial Creation</p>
<p><b>New page</b></p><div>{{Blockquote|Post era Mini Front Panel}}<br />
<br />
Don Caprio, among others, have created this Mini Imsai front panel clone. Shown here is my build of a revision F pictured here in a California Computer Systems with the front blank plate removed.<br />
<br />
[[File:MiniFrontPanel.jpg|600px]]<br />
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==Resources==<br />
* Main documentation site with [http://s100computers.com/My%20System%20Pages/Mini%20FP%20Board/Mini%20FP%20Board.htm build instructions, schematics and parts lists]<br />
* You may be able to purchase blank PCB and other parts [http://uxpro.com/shop/index.php?route=product/product&path=65&product_id=53 here] check inventory.<br />
<br />
==Errata==<br />
Apparently C81 on the PCB is not connected. No need to fill.<br />
<br />
==Inconsistencies==<br />
<br />
The board seems to work pretty solid, and consistently for me - ''when it works''. However I've noticed one anomaly with the sense switches / programmed output. Note that the image shown above is running the standard Imsai "Test Program 1" in a California Computer Systems chassis, Imsai 8080 CPU, Vector Graphic 8k static ram rev 1. Martin Eberhards [[88-2SIOJP]] EPROM monitor, serial card too although I'm not using the monitor in this instance.<br />
<br />
I have two Imsai MPU cards. They both work as expected in Imsai and Wameco front panels, however on this mini FP they both work however with one running it doesn't display the state of all the sense switches while the other does. If I put those same MPUs in the Wameco and an Imsai front panel they both work as expected. In the picture above you'll note that bits 0 - 3 aren't accurately reflecting the sense switches.<br />
<br />
<source lang="text"><br />
; Imsai Test Program 1<br />
<br />
START:<br />
0000 org <br />
LOOP:<br />
0000 DBFF in 0FFh<br />
0002 D3FF out 0FFh<br />
0004 C30000 jmp LOOP<br />
0007 end<br />
</source></div>Jeffa