Author Topic: HP Logic Analyzer Inverse Assemblers  (Read 63989 times)

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Offline Hamster

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #175 on: July 15, 2024, 08:48:34 pm »
most if all the information is in this thread, however, some processors require pre-processors to work ( z80, etc ) , you can't just hook up the LA and then use the IA(s).

all the documentation for how to compile the IA for new version Systems have been posted.

i dont think i have ever seen anything that shows cpu to cpu layout.
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Offline go4retro

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #176 on: July 16, 2024, 05:26:10 am »
most if all the information is in this thread, however, some processors require pre-processors to work ( z80, etc ) , you can't just hook up the LA and then use the IA(s).

all the documentation for how to compile the IA for new version Systems have been posted.

i dont think i have ever seen anything that shows cpu to cpu layout.

My goal was to design some adapters that didn't fall into the trap of one of the links earlier in the thread:

https://pcbjunkie.net/index.php/logic-analyzer-adapters/

Obviously, his adapter for the Z80 lacks all the buffering, but even his 6502 adapter (which would not have needed any pre-processing, according to the current thread) uses the wrong pin mappings.

And, by looking at a few mappings in a single place, I might be able to deduce how best to create a mapping for a CPU not already supported (the TI ones in the cc-40/74/95 come to mind)

Jim
 

Offline deanclaxton

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #177 on: November 07, 2024, 10:20:32 pm »
Gerbers attached for the 65C02 adapter, but I havent built/tested this yet. I'll update this post once I know its working ok - I'll slip in a few of these boards with my next order. This can be used with Phils inverse assembler (I'll have to get that running on the 16902).

The order of the STAT signals is correct for his inverse assembler. I designed and built a similar adapter for the 40 pin probes with all the termination parts on the adapter. This will be much faster to assemble!

I don't think I ever updated this thread after building my 65C02 adapter, but it works great. I'll try dig out a photo.

EDIT: cant find a good photo of it in use - the images are normally focused on what I'm testing and not the adapter, but here is a photo I took some time after building it.
« Last Edit: November 07, 2024, 10:29:38 pm by deanclaxton »
 

Offline Hamster

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #178 on: November 08, 2024, 05:50:26 pm »
I like it! Thoughts on releasing the plans?
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Offline gslick

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #179 on: November 08, 2024, 08:01:33 pm »
Good use of the Samtec connector. Makes it easier to put the newer style 90-pin logic analyzer modules to work that can be a pain to use for most things otherwise.

You might be able to sell a few of those if you built some up.
 

Offline deanclaxton

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #180 on: November 10, 2024, 10:33:19 pm »
I like it! Thoughts on releasing the plans?

I posted gerbers and schematic a while back in this same thread. It was just the other day however that I realised I'd never posted an update since I built it.

EDIT : It was quite a while ago actually, but this is where I posted the gerbers : https://www.eevblog.com/forum/testgear/hp-logic-analyzer-inverse-assemblers/msg4690589/#msg4690589

Schematic attached.
« Last Edit: November 10, 2024, 10:46:11 pm by deanclaxton »
 

Offline dorkshoei

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #181 on: December 04, 2024, 05:35:27 pm »
Couple questions:

1. Has anyone worked on an IA for the Hitachi 64180?   It's a derivative of the Z80 so I assume it would require similar active logic as the z80 preprocessor.     There was a 64180 option for the 64000 but I don't think that implies anything about the IA side.

2. What is a good price to pay (US) for a 10269C?  I believe I require it to use any of the HP pre-processors with a 16702B (assuming I ever find any of the pre-processors I want for a reasonable price  |O).   
 

Offline Hamster

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #182 on: December 04, 2024, 06:44:17 pm »
not every ia needs the 10269c

i am not aware of a IA file for the 64180

However, since the 64180 is just a Z80 w/MMU and on chip perf, you could probably just use the z80 ia and just make an adapter, the trick will be handling the mmu and any memory banking as the z80 would be handling that access internally?

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Offline MarkL

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Re: HP Logic Analyzer Inverse Assemblers
« Reply #183 on: December 05, 2024, 03:42:39 pm »
Couple questions:

1. Has anyone worked on an IA for the Hitachi 64180?   It's a derivative of the Z80 so I assume it would require similar active logic as the z80 preprocessor.     There was a 64180 option for the 64000 but I don't think that implies anything about the IA side.

2. What is a good price to pay (US) for a 10269C?  I believe I require it to use any of the HP pre-processors with a 16702B (assuming I ever find any of the pre-processors I want for a reasonable price  |O).
A cursory comparison of the HD64180 bus cycles compared to the Z80 says there's little difference.  The previous page in this thread discussed using passive general purpose probing to get the Z80 IA to work (i.e., no preprocessor), so I think it should not be a problem on the HD64180.

Granted, there's a little more to the HD64180 with its MMU, the refresh is not exactly the same, and there are a few additional instructions.  However, you could start with the Z80 IA source that's been already been adapted for passive probing, and add what you need.

https://www.eevblog.com/forum/testgear/hp-logic-analyzer-inverse-assemblers/msg5398076/#msg5398076
 


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