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Vince, Good news: 1. after re-soldering and re-seating u9 the replica1 TE has been running for two weeks without issue. also spread the pins on U9 to give a "tight" fit in the socket. As a precaution I did reprogram the eeprom. 2. The external computer power supply connected to the ATX see...
by sbenoit
Oct Fri 31, 2008 3:01 pm
 
Forum: Troubleshooting
Topic: Keyboard - every keystroke is double
Replies: 15
Views: 31088

Correction:

-480 mV dc spikes


Sorry not -480vdc

What a goof!!!
by sbenoit
Oct Mon 20, 2008 5:04 pm
 
Forum: Troubleshooting
Topic: Keyboard - every keystroke is double
Replies: 15
Views: 31088

update: I placed the 10k resistor on the 74ls245. No change. Cleaned board and touched all solder points. No Change. Burned up a new EEPROM replaced 2764. No Change Measurements: @ R8 R20 junct. My O-scope shows a -480 volt spikes with keyboard plugged in. the baseline voltage is 88mv How much noise...
by sbenoit
Oct Mon 20, 2008 5:03 pm
 
Forum: Troubleshooting
Topic: Keyboard - every keystroke is double
Replies: 15
Views: 31088

Double character output serial port or keyboard input

After a few weeks of trouble free running this started happening, both keyboard and serial port: <---snip --->\ FFF000000000RRR F000: A9 KRUSADER 1.3 BY KEN WESSEN ? NNN 000 <--- end snip --> Notice that the system vectors to the Krusader? It also will allow BASIC Programming: <--- snip -->EEE000000...
by sbenoit
Oct Mon 20, 2008 8:24 am
 
Forum: Troubleshooting
Topic: Keyboard - every keystroke is double
Replies: 15
Views: 31088

Krusader v 1.3 section 8.3 Moving Memory

System: Replica 1 TE Multi I/O board KRUSADER 1.3 BY KEN WESSEN enter and test code per section 2 Sample Section (note: manual from CD that came with system, krusader12.pdf) <-- snip --> ? L 000 LDA #'A' 001 LOOP JSR $FFEF 002 CLC 003 ADC #$1 004 CMP #'Z'+1 005 BNE LOOP 006 RTS ? A 0300-030C ? R $30...
by sbenoit
Oct Sun 19, 2008 11:40 pm
 
Forum: Software
Topic: Krusader v 1.3 section 8.3 Moving Memory
Replies: 1
Views: 6028

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