BackstorySo I was missing my old HP 1663c logic analyzer that I sold after getting a 16700A and good cards. The 16700A is absolutely awesome but it's also quite slow to boot and cumbersome to operate through X-Window as well as loud and hot. When I need it, I need it, but often I don't.
I missed the immediacy of the 166x with their 5 seconds boot time and having every function a button press away and instantly displayed. But my 1663c had no LAN and too few channels.
I found a 1661C in great cosmetic condition, with option 15 (double RAM and LAN), it has 102 channels to my old 1663's 34. I got it for $50.
RepairIt had 2 problems : ROM self-test failed and hard-disk self-test failed.
It did boot completely and could make measurements, so I figured the boot ROM was OK, and maybe the flash had a few bitflips after 20 years, causing a bad checksum.
Surprise, the floppy was also dead when it arrived, which spiced things up a bit... (I thought they were regular PC drives, but no such luck. I was able to disassemble and repair mine though, so no biggie
)
I made fresh floppies of the OS and reflashed the ROMs. Self test passes. I ran the full performance verification suite, everything is good and all channels work
.
On to the IDE hard drive, which I thought would be the easy part...
ProblemThe original drive is a 540MB Quantum from 1997 which spins up but makes a very sad sound. When I try to access it on the LA, it times out of all requests, same if I try to format it. No surprises so far. THE MACHINE DOES NOT CRASH, it just says "drive access timeout" or some such error message and happily continues along, like a proper, civilized little computer would.
I did not have another small capacity 3.5in PATA, but I had known good laptop drives and adapters so I tried that first. With a 6.4GB hitachi, the LA fails hard disk self test on boot, displays "unknown format" in the file manager and crashes when I execute a format command. The whole machine hangs and a popup displays "Software error. Please record the following numbers 0000 00000418 0020" everything is then frozen and I must power cycle the machine.
I tried to prepare the disk on a linux box by creating a new dos MBR, with a single 540MB FAT16 dos partition, same behaviour.
I next tried a compactflash adapter with a 4GB card : still hangs with the software error.
All drives spin up normally (the CF card does not spin...), all power leds light up. +5V and +12V are OK (4.98, 12.03).
Formatting FLOPPIES work, even when they are "unknown format" (apple HFS) when inserted.
Anybody ever seen something like this on HP/Agilent 166x or 167x series logic analyzers? Maybe also on 16500 from which the portables are derived?
NOTE : I had tried to format a drive before refreshing the OS in flash and had the same behaviour, which led me to restoring the flash first.