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He was trying to tell you that until you have a working CPU, all of your other tests are wasted. The clock has to work, and the processor has to be latching addresses. If it doesn't, it doesn't matter

I'm pretty sure I've found the answer to my problem, though maybe not a solution. In my earlier message, I forgot to mention that I replaced the battery in the Clock/NVRAM module, since the time

Where are you located? I can read, archive, and program these chips if you would like. These chips are supported by BP Micro Programmers including the BP 1410 and BP 1600 and later programmers. They

I didn't experience the issue myself; I have always used static IP. I haven't used it hours on end, but I've had no issues for relatively short uses of the scope. Remember to pick a static IP in the

I think I have the GQ-4X and I looked into it programming another dallas part for the TDS320.? What i remember is not all DALLAS parts are directly supported.? Your not going to need a programming

Hi Dave, Thanks for your response. I have tried not using DHCP and using the static address that the 'scope acquired when the LAN interface was still working. I could find it in the router's

I seem to recall there being a known issue with these and DHCP. Have you tried setting a static IP appropriate to your network, leaving DHCP turned off? Dave Casey wrote:

I forgot to mention that after the problem appeared, I upgraded the 'scope from firmware version 3.27 to 3.39 and even to 3.41 (the latest version) to no avail. Raymond

I recently acquired a TDS 3014B 'scope. It looks fine and operates as it should, except for its LAN interface. In the beginning (first half day since I got the 'scope), it could sometimes be

Hey Roger, I don't know the answer to your question regarding reading and writing the NVRAM. But I wonder why you feel you need to save and restore the NVRAM data. The calibration information for the

Dear all, I will have to replace the dallas chips (DS1486/DS1650) of my TDS684A. I have ordered the replacement kits (not fake China chip) from a source I have found in EEVBlog. While I wait, I have

In case you or someone else needs one or more: I've got hundreds of NOS 8085's (OKI) in their original rails at a few €/$/?'s each. Shipment from NL. Raymond

I was not getting anything at all on ALE. I removed and re-seated the 8085. Unlike the TTL logic chips, the pins on the processor were shiny and clean. However, since I have disconnected the A19 board

If you are not getting a TTL level pulse(s) on the ALE pin after reset, I would not bother going any further. Is the 8085 sitting in one of those POS TI sockets? Try rocking the core chips in their

As I recall I think the ACQ board and the computer board are "married" . I do not know how to arrange divorce and re-marry. If your effort does not work I would change back to the original ACQ board

Indeed, my suspicions were also heading in that direction, but its good to have another view. HOLD is connected directly to GND and I confirmed a ground connection there. READY is connected to 5V via

Hi Tony. First I want to thank you for your kindness in answering me. Both scopes show code 3000 in the POST. I have the service manual. Reading pags 5.36 and 5.37 of the manual, they tell you to

John, I think suspicions may be moving from ROM rot to a bad CPU or at least a need to clean the CPU pins. Before condemning the CPU check that the voltage swing on the clock input, pin 1, comfortably

One technique to "trap" a bad microprocessor is to have a series of jump or branch instructions surrounding a halt instruction.? If the mandatory jump or branch failed, then the processor would halt,