A600 CPU adapter (PLCC to DIP64)

TF530 - 63030 + RAM Board

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kludge
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Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

terriblefire wrote: ↑Thu Mar 21, 2019 9:08 am Annoyingly the spare HP1661CS on my lab floor would tell me the problem in seconds.
Spare, you say...

Seriously though, I’ll check if I know someone with a better LA, otherwise I have spare adapter PCBs and postage is cheap :)
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Maximilian
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Re: Compatibility issues with TF530/TF534 and A600?

Post by Maximilian »

A drawing/detailed description/photo of the modifications you made to the bus arbitration lines would be interesting...
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kludge
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Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

Maximilian wrote: ↑Thu Mar 21, 2019 9:29 am A drawing/detailed description/photo of the modifications you made to the bus arbitration lines would be interesting...
Something like this... Off the top of my head. :)

adapter schematics.png
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A kludge is a workaround or quick-and-dirty solution that is clumsy, inelegant, inefficient, difficult to extend and hard to maintain.

My lack of focus:
[ 4 * Amiga 500 ][ Amiga 500+ ][ 2 * Amiga 600 ][ A1200 ][ Amiga 2000 w/ A2386 ][ Amiga 4000/030 w/ CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ Mac Classic ][ Mac Classic II ][ Mac Colour Classic ]
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Maximilian
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Re: Compatibility issues with TF530/TF534 and A600?

Post by Maximilian »

And both _hlt are now tied together?
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kludge
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Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

Maximilian wrote: ↑Thu Mar 21, 2019 10:38 am And both _hlt are now tied together?
Yep
A kludge is a workaround or quick-and-dirty solution that is clumsy, inelegant, inefficient, difficult to extend and hard to maintain.

My lack of focus:
[ 4 * Amiga 500 ][ Amiga 500+ ][ 2 * Amiga 600 ][ A1200 ][ Amiga 2000 w/ A2386 ][ Amiga 4000/030 w/ CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ Mac Classic ][ Mac Classic II ][ Mac Colour Classic ]
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terriblefire
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Re: Compatibility issues with TF530/TF534 and A600?

Post by terriblefire »

kludge wrote: ↑Thu Mar 21, 2019 10:47 am
Maximilian wrote: ↑Thu Mar 21, 2019 10:38 am And both _hlt are now tied together?
Yep
Does diagrom do any serial output with the DIP68000 removed. Thats the first thing to check.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
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kludge
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Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

terriblefire wrote: ↑Thu Mar 21, 2019 11:36 am Does diagrom do any serial output with the DIP68000 removed. Thats the first thing to check.
Crap. Yeah, that needs to be checked. Will try tonight.

Got some pointers from Edu Arana in PM as well that I will check out.
A kludge is a workaround or quick-and-dirty solution that is clumsy, inelegant, inefficient, difficult to extend and hard to maintain.

My lack of focus:
[ 4 * Amiga 500 ][ Amiga 500+ ][ 2 * Amiga 600 ][ A1200 ][ Amiga 2000 w/ A2386 ][ Amiga 4000/030 w/ CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ Mac Classic ][ Mac Classic II ][ Mac Colour Classic ]
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kludge
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Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

terriblefire wrote: ↑Thu Mar 21, 2019 11:36 am Does diagrom do any serial output with the DIP68000 removed. Thats the first thing to check.
Without the DIP64 CPU in the adapter the machine is dead. So far so good.

Edu Arana suggested to me that I should try pulling the PLCC BR low and the DIP64 BR high as the only modifications. Tried it, and it seems somewhat better. Still weird results, but a bit more repeatable, and I got some other things (graphics!) on the screen.

Still not booting though.
A kludge is a workaround or quick-and-dirty solution that is clumsy, inelegant, inefficient, difficult to extend and hard to maintain.

My lack of focus:
[ 4 * Amiga 500 ][ Amiga 500+ ][ 2 * Amiga 600 ][ A1200 ][ Amiga 2000 w/ A2386 ][ Amiga 4000/030 w/ CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ Mac Classic ][ Mac Classic II ][ Mac Colour Classic ]
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kludge
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Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

A kludge is a workaround or quick-and-dirty solution that is clumsy, inelegant, inefficient, difficult to extend and hard to maintain.

My lack of focus:
[ 4 * Amiga 500 ][ Amiga 500+ ][ 2 * Amiga 600 ][ A1200 ][ Amiga 2000 w/ A2386 ][ Amiga 4000/030 w/ CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ Mac Classic ][ Mac Classic II ][ Mac Colour Classic ]
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Maximilian
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Re: Compatibility issues with TF530/TF534 and A600?

Post by Maximilian »

Could this be the problem?
In the a600 the BR is tied to VPA and those are tied to a 1k resistor.
So if you pull down BR you are also pulling down VPA......not a problem during startup but maybe during normal running?

Also the 1k pullups are a lot stronger then the 470/4k7 ohm resistors on the A500.
Knipsel.PNG
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