21 Aug
2023
21 Aug
'23
6:29 a.m.
On Aug 20, 2023, at 7:27 PM, Mike Loewen via cctalk
<cctalk(a)classiccmp.org> wrote:
On Sun, 20 Aug 2023, Chuck Guzis via cctalk wrote:
If it's hooked up right, a logic analyzer can also be a powerful software debugging
tool. The first time I saw a logic analyzer was in the hands of a DEC software engineer
(Anton Chernoff, I think) who had one hooked up to a PDP-11's console buses. It was
amazing to see execution captured in real time, giving much more power than ODT ever had.
Meanwhile, on logic analyzers: I have a Fluke (Philips) PM3585 analyzer at home,
unfortunately short on pods so I can use only about 32 of the 96 channels. It's
pretty flexible, has lots of channels, and (in state-only mode at least) a decent amount
of memory. No plugins, just a single box. It's not as well known so the price may be
lower, I haven't checked.
paul
On 8/20/23 12:43, Glen Slick via cctalk wrote:
I agree that the logic analyzer is a last resort, but when you need one they're
indispensable. On Sun, Aug 20, 2023, 12:05 PM John H. Reinhardt
via cctalk <
cctalk(a)classiccmp.org> wrote:
> Hello all. I looking around for a Logic Analyzer for doing (mostly) DEC
> QBus/UniBus stuff. Being the way I am I want something with enough lines
> to handle the most of the signals so I'm guessing something with roughly
> 80-ish channels. I think that lets out all/most of the USB based LA. I've
> looked around and it seems the the HP/Agilent 16700 series (16700B/16702B)
> are probably what I want. I've also seen the 1670G which also seems quite
> doable. I've seen a lot of posts at the EEVblog and it seems I missed
> possibly the golden age of 16700 LA by a few years price-wise.
And to think that the old guys had an analogue lab scope and that was
about it. Personally, I find that setting up a logic analyzer to be a
last resort--all those damned wires to get right, then setting up capture...