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HP Logic Analyzer Inverse Assemblers

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deanclaxton:

--- Quote from: Hamster on November 08, 2024, 05:50:26 pm ---I like it! Thoughts on releasing the plans?

--- End quote ---

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.

dorkshoei:
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).   

Hamster:
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?

MarkL:

--- Quote from: dorkshoei 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).

--- End quote ---
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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