[Coco] Kip's Single Board Computer
Pere
psergm at gmail.com
Sat Sep 19 10:40:15 EDT 2015
Hi Jim,
don't shoot if this doesn't make sense ...
Comparing Sarle's board to the connections you say, there are some
differences:
- The capacitor for 8MHz are just 15pF (not a big difference)
- Reset is connected via 2K2 instead of 10K
- The others are tied together right to the +5V bus (apparently no R's) you
talk about 10K
- In the power supply he has added two capacitors:
100nF and 100uF
I can't figure what the result of these changes could be ... you know a lot
more on hardware.
cheers
pere
===========================================================================
Original Message: 5
Date: Fri, 18 Sep 2015 17:38:54 -0400 (EDT)
From: RETRO Innovations <go4retro at go4retro.com>
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Subject: Re: [Coco] Kip's Single Board Computer
Message-ID:
<820351008.281310.1442612334755.JavaMail.open-xchange at oxuslxltgw01.lxa.perfora.net>
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No schematics, but it's a simple setup:
6309/6809:
Vcc to 5V
Vss to GND
HALT, MRDY, DMA, FIRQ,RESET, IRQ, NMI all pulled to Vcc via 10K
resistors
10uF cap from RESET to GROUND
8MHz crystal on Xtal and Extal
22pF caps from Xtal to GND and Extal to GND
Jim
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