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A600 CPU adapter (PLCC to DIP64)

TF530 - 63030 + RAM Board

Moderators: terriblefire, Terriblefire Moderator

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kludge
Posts: 400
Joined: 08 Nov 2018 14:05
Location: Sweden

Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

terriblefire wrote: 21 Mar 2019 09:08 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 :)
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:
[ 8 * A500 ][ 2 * A500+ ][ 2 * A600 ][ 2 * A1200 ][ 2 * A2000 w/ A2386 ][ A4000 w/ TF4060, CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ 3 * Mac Classics of different types ]
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Maximilian
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Joined: 28 Feb 2019 17:02

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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Location: Sweden

Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

Maximilian wrote: 21 Mar 2019 09:29 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:
[ 8 * A500 ][ 2 * A500+ ][ 2 * A600 ][ 2 * A1200 ][ 2 * A2000 w/ A2386 ][ A4000 w/ TF4060, CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ 3 * Mac Classics of different types ]
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Maximilian
Posts: 405
Joined: 28 Feb 2019 17:02

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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Joined: 08 Nov 2018 14:05
Location: Sweden

Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

Maximilian wrote: 21 Mar 2019 10:38 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:
[ 8 * A500 ][ 2 * A500+ ][ 2 * A600 ][ 2 * A1200 ][ 2 * A2000 w/ A2386 ][ A4000 w/ TF4060, CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ 3 * Mac Classics of different types ]
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terriblefire
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Re: Compatibility issues with TF530/TF534 and A600?

Post by terriblefire »

kludge wrote: 21 Mar 2019 10:47
Maximilian wrote: 21 Mar 2019 10:38 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
indicates how much hurting you shall receive."
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kludge
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Location: Sweden

Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

terriblefire wrote: 21 Mar 2019 11:36 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:
[ 8 * A500 ][ 2 * A500+ ][ 2 * A600 ][ 2 * A1200 ][ 2 * A2000 w/ A2386 ][ A4000 w/ TF4060, CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ 3 * Mac Classics of different types ]
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User avatar
kludge
Posts: 400
Joined: 08 Nov 2018 14:05
Location: Sweden

Re: Compatibility issues with TF530/TF534 and A600?

Post by kludge »

terriblefire wrote: 21 Mar 2019 11:36 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:
[ 8 * A500 ][ 2 * A500+ ][ 2 * A600 ][ 2 * A1200 ][ 2 * A2000 w/ A2386 ][ A4000 w/ TF4060, CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ 3 * Mac Classics of different types ]
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User avatar
kludge
Posts: 400
Joined: 08 Nov 2018 14:05
Location: Sweden

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:
[ 8 * A500 ][ 2 * A500+ ][ 2 * A600 ][ 2 * A1200 ][ 2 * A2000 w/ A2386 ][ A4000 w/ TF4060, CyberVision 64 3D, FastLane SCSI Z3 ][ CD32 ][ VIC-20 ][ 4 * C64 Breadbin ][ 5 * C64C ][ 2 * C128 ][ C128D ][ C64 DTV ][ 3 * Mac Classics of different types ]
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Maximilian
Posts: 405
Joined: 28 Feb 2019 17:02

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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