Fluke 9010A and old Atari Night Driver board
I'm trying to get a Fluke 9010A with 6502 pod to work with an old Atari 'Night Driver' board (circa 1976, black & white). Trouble is that I'm getting the good old 'UUT Power Fail' on the Fluke. The Fluke and pod are fine with other (later) boards so I'm guessing that, once again, it's a clocking related problem. Night Driver uses 2 x 330 ohm resistors with the 12 MHz crystal and the board works (but with video problems) using a 6502 CPU instead of the Fluke. Just as an experiment I tried using 150 ohm resistors with the crystal instead of the 330's but no dice I'm afraid. Have also tried varying the voltage but to no avail. Any ideas please folks? Ta, Phil _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist
I'm trying to get a Fluke 9010A with 6502 pod to work with an old Atari 'Night Driver' board (circa 1976, black & white). Trouble is that I'm getting the good old 'UUT Power Fail' on the Fluke.
The Fluke and pod are fine with other (later) boards so I'm guessing that, once again, it's a clocking related problem.
If it's a clocking problem, you be getting Pod timeout errors rather than power fail errors, wouldn't you? It's most likely that your LM309 is sagging just a little. If you disable power error trapping, you'll probably be fine. It's not a problem endemic to Night Driver boards, as we've done quite a few and never had the issue you are describing.
Have also tried varying the voltage but to no avail.
How could you do that without bypassing the LM309? Alex ---- ayeckley@elektronforge.com www.elektronforge.com _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist
If it's a clocking problem, you be getting Pod timeout errors rather than power fail errors, wouldn't you?
Not necessarily - for example, I've had the same problem on an L-shaped S.I. boardset which has been 'fixed' by changing the two resistors that work alongside the crystal.
It's most likely that your LM309 is sagging just a little. If you disable power error trapping, you'll probably be fine.
Tried that but no luck I'm afraid.
It's not a problem endemic to Night Driver boards, as we've done quite a few and never had the issue you are describing.
I see - well, this is a first then. :)
Have also tried varying the voltage but to no avail.
How could you do that without bypassing the LM309?
Well, because I'm only testing this (but don't have the original AC PSU) I've rigged it up on my test bench and bypassed the LM309/LM323 by wiring the relevant DC voltages directly to the correct tracks on the board. Seems to work too - at least, with a normal 6502 CPU. Phil _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist
If you have the extension socket (Instrument Accessory #9000A-7201), then you can check the voltage(s) as connected to the pod. It is possible that you have a bad connection at the UUT socket, isn't it? You have run the pod self test and wiggled the cable while under self test? John :-#)# At 5:48 PM +0100 5/28/05, Phil Morris wrote:
If it's a clocking problem, you be getting Pod timeout errors rather than power fail errors, wouldn't you?
Not necessarily - for example, I've had the same problem on an L-shaped S.I. boardset which has been 'fixed' by changing the two resistors that work alongside the crystal.
It's most likely that your LM309 is sagging just a little. If you disable power error trapping, you'll probably be fine.
Tried that but no luck I'm afraid.
It's not a problem endemic to Night Driver boards, as we've done quite a few and never had the issue you are describing.
I see - well, this is a first then. :)
Have also tried varying the voltage but to no avail.
How could you do that without bypassing the LM309?
Well, because I'm only testing this (but don't have the original AC PSU) I've rigged it up on my test bench and bypassed the LM309/LM323 by wiring the relevant DC voltages directly to the correct tracks on the board.
Seems to work too - at least, with a normal 6502 CPU.
Phil
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If you have the extension socket (Instrument Accessory #9000A-7201), then you can check the voltage(s) as connected to the pod.
Afraid I don't have that.
It is possible that you have a bad connection at the UUT socket, isn't it? You have run the pod self test and wiggled the cable while under self test?
Tried all that - besides which, I've only just put a new CPU socket onto the N.D. board as it was impossible to plug the Fluke into the original socket. The 6502 CPU works fine in the new socket, but the Fluke 6502 pod won't (yet it works on other 6502-based boards). I'm sure the socket and contacts are fine. Phil _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist
Then go into Setup and tell the 9100A to simply ignore the power supply... John :-#)# At 6:14 PM +0100 5/28/05, Phil Morris wrote:
If you have the extension socket (Instrument Accessory #9000A-7201), then you can check the voltage(s) as connected to the pod.
Afraid I don't have that.
It is possible that you have a bad connection at the UUT socket, isn't it? You have run the pod self test and wiggled the cable while under self test?
Tried all that - besides which, I've only just put a new CPU socket onto the N.D. board as it was impossible to plug the Fluke into the original socket.
The 6502 CPU works fine in the new socket, but the Fluke 6502 pod won't (yet it works on other 6502-based boards). I'm sure the socket and contacts are fine.
Phil
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participants (3)
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Alex Yeckley -
John Robertson -
Phil Morris