Steve Toner-
Sound Fixed!
09/01/2019 at 00:50 • 0 comments -
Audio Failure Investigation
08/14/2019 at 19:40 • 0 commentsThe CRT monitor's audio output failed at VCF West. Tracking down the cause and trying to come up with a solution:
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VCF Debrief
08/14/2019 at 19:36 • 0 commentsVCF Debrief:
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Code Listing
06/28/2019 at 19:32 • 0 commentsAdded source code listing: https://cdn.hackaday.io/files/1637817007206304/code%20listing.pdf
It's all in one file because the version of as9 that I have apparently does not support the INCLUDE directive...
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Timer Schematic
06/22/2019 at 20:36 • 0 commentsInterfacing the Intel 8253 timer to the MC6809 CPU, using a 74LS31 delay element to get the signal timing right...
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I/O Schematic
06/10/2019 at 20:57 • 0 commentsTrying to get caught up here. Still need to update & post the Timer schematic... This is the I/O decode & parallel port page.
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Sound Card Schematic
05/06/2019 at 16:44 • 0 comments![]()
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Sound Added!
05/05/2019 at 00:32 • 0 comments -
Making Progress
04/03/2019 at 21:28 • 0 commentsButtons and coin acceptor now operating...
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Video Output Schematic
04/03/2019 at 20:09 • 0 commentsThis is the video output section, providing monochrome NTSC composite video:
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Based on the TVT 6 5/8 design presented in The Cheap Video Cookbook by Don Lancaster, but see notes for changes I made to make it work properly.
