16BIT ROM CART THOUGHTS

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exxos
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Re: 16BIT ROM CART THOUGHTS

Post by exxos »

I've redone the schematic for the 16bit PLCC ROM...

I tried to autorouter on 2 layers.. Eagle gave up at 40% and basically went nuts :roll:

wtf.JPG
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It would likely have to be done on 4 layers which just makes it very time consuming to do :(

It's got to the point where I just don't have the patience anymore to sit puzzling for hours over routing pcbs.. I've already spent ages trying to route previous designs, so i'm not really motivated anymore to spend more time on this.

So If anyone wants to have a crack at routing it...

cartridge2.zip
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rpineau
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Re: 16BIT ROM CART THOUGHTS

Post by rpineau »

Challenge accepted :
Screen Shot 2018-03-08 at 10.26.31.png
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Working ones : MegaSTE (68020) / TT030 / Falcon with AB040 & Eclipse / 1040STF
Need testing : Falcon with CT2
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Re: 16BIT ROM CART THOUGHTS

Post by exxos »

rpineau wrote: Thu Mar 08, 2018 6:27 pm Challenge accepted :
:bravo: :cheers:

Routing pcbs is making me :pullhair: :stars: :crazy:
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viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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Re: 16BIT ROM CART THOUGHTS

Post by exxos »

Been fiddling around with Rodolphe's layout a bit..

Mostly added poly fill for 0V top and bottom layers. Manually routed some 5V and 0V traces. I think its pretty much ready to go off to fab for a prototype run..

rv.JPG
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Re: 16BIT ROM CART THOUGHTS

Post by exxos »

Test PCBs arrived... Next to find some time to build and test...

dcart.jpg
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Re: 16BIT ROM CART THOUGHTS

Post by exxos »

Next to work out how to program the ROM..

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Re: 16BIT ROM CART THOUGHTS

Post by exxos »

I have tried swapped and not swapped ST diag image files and nothing happens :shrug: So either I've ballsed something up, or 16bit idea just doesn't work for some reason :shrug:

I've got some more ROM's coming this week, could be my eprom have bad connections.. So will program both files again and see if anything happens then..
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Re: 16BIT ROM CART THOUGHTS

Post by rpineau »

can you show us the merged file so that I can check if they look fine (and send me the original too so that I can compare :) ).
Working ones : MegaSTE (68020) / TT030 / Falcon with AB040 & Eclipse / 1040STF
Need testing : Falcon with CT2
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Re: 16BIT ROM CART THOUGHTS

Post by exxos »

rpineau wrote: Tue Apr 03, 2018 9:01 pm can you show us the merged file so that I can check if they look fine (and send me the original too so that I can compare :) ).
Atari Test Cart Original Roms.zip
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Re: 16BIT ROM CART THOUGHTS

Post by rpineau »

So DIAG_LO_HI.bin is a merge of the 2 other one and then byte-swapped ready to program as it starts with $52 $FA $5F $23 (diag cartridge starts with $FA52235F).
So this file looks good to me and is ready to program.
Working ones : MegaSTE (68020) / TT030 / Falcon with AB040 & Eclipse / 1040STF
Need testing : Falcon with CT2
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