Envelope-to: craig@sbc-85.com
Delivery-date: Fri, 29 Aug 2025 17:51:55 -0500
To: craig@sbc-85.com
Subject: Reply to thread 'Compiling a list of SC/MP Project Boards'
From: "UK Vintage Radio Repair and Restoration Discussion Forum" <no_reply@vintage-radio.net>
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Date: Fri, 29 Aug 2025 23:51:42 +0100

Dear HelloWorld,

SiriusHardware has just replied to a thread you have subscribed to entitled - Compiling a list of SC/MP Project Boards - in the Vintage Computers forum of UK Vintage Radio Repair and Restoration Discussion Forum.

This thread is located at:
https://www.vintage-radio.net/forum/showthread.php?t=221696&goto=newpost

Here is the message that has just been posted:
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---Quote---
i may have missed the final answer, but was there a VII board without some of the earlier issues?
---End Quote---
Slothie's issue VI in its final version (the version you already know about and have featured on your page) had no technical or operational 'issues' at all which was quite incredible as Slothie never had the opportunity to test an example himself before he made the files publicly available so that we could try it out. We had some PCBS made, Tim and myself built one each and they just worked, no fixes or mods needed.

The issue VI PCB did however have some minor 'cosmetic' issues, such as:-

-The orientation of the ICs is not indicated as well as it could have been by the screen printing, with pin 1 being designated by a small 'indent' in the pin-1 corner rather than a  more conspicuous U-shaped notch at one end. With the PCB in its logical 'portrait' orientation with the keypad at the bottom, all of the ICs without exception go in with their pin 1 end / notched end pointing to the left.

-The screen printing for the position of the the axial electrolytic next to the reset button does not have its polarity / orientation indicated. (The negative end goes next to the switch).

-The component type and component numbers for the IC to the immediate left of the display are jumbled up together in the screen printing - it should be a 74LS365.

The above are the only 'issues' I'm aware of with the issue VI - in other words purely cosmetic ones.

However, because Slothie had made the design files freely available, someone then took the issue VI, possibly corrected the above screen printing errors and also re-laid the keypad section so that it could accept actual Cherry keyboard switches, and called that modified version the 'issue VII'. 

However, I don't know if he made the files for that redesigned version publicly available. I think Tim would be the person to ask.
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UK Vintage Radio Repair and Restoration Discussion Forum

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