Looking for OSI 542C Keyboard Schematic

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nama
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Looking for OSI 542C Keyboard Schematic

Post by nama » Sun Dec 25, 2011 11:53 am

Just wondering if anyone here has the schematic for the 542C Keyboard?

Thanks

2P (1mhz 32k) - 502 + 8k + CEGMON + garbage collector fix BASIC, D&N MEM-CM9 + 24k, 540 (mono)
4PMF (2mhz 48k) - 505, 540 (color), 2 x 527, 5.25" Mini Floppy
Superboard RevD - CEGMON
Spares - 2 x 527
http://www.neoncluster.com
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nama
Posts: 229
Joined: Wed Mar 30, 2011 9:44 am
Location: Japan
Contact:
Contact nama

Re: Looking for OSI 542C Keyboard Schematic

Post by nama » Tue Jan 03, 2012 5:49 am

Keyboard fixed...The problem was a dead pull up resistor on the C0 line.

Phil

2P (1mhz 32k) - 502 + 8k + CEGMON + garbage collector fix BASIC, D&N MEM-CM9 + 24k, 540 (mono)
4PMF (2mhz 48k) - 505, 540 (color), 2 x 527, 5.25" Mini Floppy
Superboard RevD - CEGMON
Spares - 2 x 527
http://www.neoncluster.com
Top
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