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N* Horizon
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BrightFame
Jan 13, 2011, 11:46:44 AM1/13/11
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I am back on line and working on my N* Horizon. I have been able to
get it running. The CPU "ZPB-A2" is working. I added the PROM Option
but I am having problems with Keyboard Input. I started with Dave
Dunfields ROM only Monitor and have added some TRACE [OUT 2's with A
set to a Letter] Instructions to it and deduced where the Code is
Failing. I am hoping someone out there could test one of The PROMs I
have to see if it works for them. I also keyed in a Test program for
the N* HSIO-4 Board I have and it will show Output on Port A but it
hangs the same as the Other Prom does. Then I keyed in a Memory Test
Program for my 8K Vector Graphic Board and it Hung as well. I rem'ed
out the offending JNZ and was able to get the Program to proceed. I am
putting together a JIG with a Wire Wrap Socket plugged into a Machine
Tooled Socket and a ZIF socket in top so I can put the 8251 in it then
attach my Oscilloscope Probes and VOM to see what is happening. I am
also making one to test the 1488/1489's
This morning I hauled out my VG Bit Streamer and with the help of my
Breakout Box it is Working, It too also fails on the IN 3
Bummer
Bob
get it running. The CPU "ZPB-A2" is working. I added the PROM Option
but I am having problems with Keyboard Input. I started with Dave
Dunfields ROM only Monitor and have added some TRACE [OUT 2's with A
set to a Letter] Instructions to it and deduced where the Code is
Failing. I am hoping someone out there could test one of The PROMs I
have to see if it works for them. I also keyed in a Test program for
the N* HSIO-4 Board I have and it will show Output on Port A but it
hangs the same as the Other Prom does. Then I keyed in a Memory Test
Program for my 8K Vector Graphic Board and it Hung as well. I rem'ed
out the offending JNZ and was able to get the Program to proceed. I am
putting together a JIG with a Wire Wrap Socket plugged into a Machine
Tooled Socket and a ZIF socket in top so I can put the 8251 in it then
attach my Oscilloscope Probes and VOM to see what is happening. I am
also making one to test the 1488/1489's
This morning I hauled out my VG Bit Streamer and with the help of my
Breakout Box it is Working, It too also fails on the IN 3
Bummer
Bob
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