EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: Carrington on September 08, 2015, 07:03:47 pm
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Hi guys.
I need the datasheet for the NMOS/CSG 8364 (PAULA) and 8520 (CIA), both used in Commodore Amiga computers.
Anybody know where I can find them?
After a long search I could only find this info:
MOS/CSG CIA:s 8520 and 6526 are quite similar devices. 8520 does not have the same "TOD"-clock that 6526 does have. 8520 seems to have more powerful output at some pins, where as outputs from 6526 are capable of sinking only 3.2 mA (min.) or sourcing 200 uA (min.) 1 mA (typ.)
Source: http://www.commodorefree.com/magazine/vol3/issue26.html (http://www.commodorefree.com/magazine/vol3/issue26.html)
And the 6526 datasheet: http://www.amiga.serveftp.net/Datasheets/6526_CIA_specification.pdf (http://www.amiga.serveftp.net/Datasheets/6526_CIA_specification.pdf)
Any help is welcome, thanks in advance.
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I don't think they ever published full datasheets.
The registers are covered in the Hardware Reference Manual (http://amigadev.elowar.com/read/ADCD_2.1/Hardware_Manual_guide/node0000.html).
There is also block diagrams in the back of the A500 manual and maybe the service manuals have more details. I found a bunch at https://archive.org/details/commodoreamigamanuals?&sort=-downloads (https://archive.org/details/commodoreamigamanuals?&sort=-downloads).
I hope this helps.
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@ ShawnD: First, thank you very much for your reply.
I don't think they ever published full datasheets.
Probably, because after several days I could not find anything.
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Afaik the 8520 was made by national semi and or generel electric ( ay-3-8520 OR AY-5-8520)
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Afaik the 8520 was made by national semi and or generel electric ( ay-3-8520 OR AY-5-8520)
Hi Vincent, thank you very much for your reply.
You are referring to this chip:
https://en.wikipedia.org/wiki/AY-3-8500 (https://en.wikipedia.org/wiki/AY-3-8500)
However mine is a different one, I attach some pictures:
(https://www.eevblog.com/forum/projects/nmoscsg-8364-(paula)-and-8520-(cia)-datasheets/?action=dlattach;attach=171038;image)
Thanks again.
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Hi guys.
I need the datasheet for the NMOS/CSG 8364 (PAULA) and 8520 (CIA), both used in Commodore Amiga computers.
Anybody know where I can find them?
After a long search I could only find this info:
MOS/CSG CIA:s 8520 and 6526 are quite similar devices. 8520 does not have the same "TOD"-clock that 6526 does have. 8520 seems to have more powerful output at some pins, where as outputs from 6526 are capable of sinking only 3.2 mA (min.) or sourcing 200 uA (min.) 1 mA (typ.)
Source: http://www.commodorefree.com/magazine/vol3/issue26.html (http://www.commodorefree.com/magazine/vol3/issue26.html)
And the 6526 datasheet: http://www.amiga.serveftp.net/Datasheets/6526_CIA_specification.pdf (http://www.amiga.serveftp.net/Datasheets/6526_CIA_specification.pdf)
Any help is welcome, thanks in advance.
I've seen Dave Haynie posting in the last year or so. He might help you if you contact him.
Bill Herd is another person that might have a lead on where to find an 8520 datasheet. He's a regular contributor to Hack-A-Day now.
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IIRC the manual of the Amiga 500 had full schematics in them.
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Schematics won't help much with what's in the chips...
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Actually they do. They show how to use a chip in a circuit. The programming manual says the rest. It would surprise me if the topic starter is going to use these very old chips in a new mass produced product and since these chips are 100% digital there is no analog part to worry about.
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The 8520 shown above is made by MOS - not a big supprise, as this was a comodore daugther company. The same is probably true for the other costom chips.
The circuit diagram helps to get the pin numbers an possibly some details (inverted or not) on the pins. The programming manual of the amiga should have most of the programming side. However there might be parts missing if some function of the chips was left unused, this might not appear in the programming manual.
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How about this?
http://raven1.magix.net/8520%20CIA.pdf (http://raven1.magix.net/8520%20CIA.pdf)
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Thanks to everyone. The people on this forum is great! :-+
@ ralphd:
Good Idea! I'll try.
@ mos6502:
Intriguing, because that is the 1581's service manual, a 3.5" Disk Drive.
I'll be a little more specific:
I need to know which port is OC (internal PULL-UPs) and what port is PUSH-PULL type.
Also the electrical specification, timing diagrams, etc... You know, all the stuff that can be found on a typical datasheet.
Let's see if I'm lucky... :)
Cheers,
Carrington.
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I'll be a little more specific:
I need to know which port is OC (internal PULL-UPs) and what port is PUSH-PULL type.
Also the electrical specification, timing diagrams, etc... You know, all the stuff that can be found on a typical datasheet.
well, that info was never publicly released. You could ask Jens Schönfeld maybe, he has a treasure trove of knowledge.
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@ BloodyCactus:
Yesterday I received an email from Bil Herd and Dave Haynie on the subject. These guys are great! :-+
And effectively, yes, you're right, that info was never publicly released.
Moreover none of these chips had conventional datasheets (in-house datasheets) because they were for internal use only.
They had the specs, as is logical, but unfortunately didn't make a copy for the future. A pity.
However they confirmed me that the 8520 is a 6525 with a few changes at the request of the Amiga 1000 development team.
For example, Dave points out that the 6526 has a BCD-encoded clock, while the 8520's is pure binary. And perhaps other changes were made in the pinout, etc...
So, in conclusion, find these documents is almost impossible.
Thank you very much for your reply. Thanks to everyone.
Cheers,
Carrington.
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PNG hires scan for CSG8520: https://ulozto.net/!MucAqcyV5/specifications-cia-png-zip - archive size approx 60MB.
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Hi "pandy", welcome to the forum.
I haven't seen your post before, sorry for the late reply.
Amazing, it's just what I was looking for, thank you very much!
Where did you find it? :scared:
Thanks again. :-+
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Hi "pandy", welcome to the forum.
I haven't seen your post before, sorry for the late reply.
Amazing, it's just what I was looking for, thank you very much!
Where did you find it? :scared:
Thanks again. :-+
Hello Carrington, thank you.
I believe We all ( at least Amiga community ) should thanks this humble guy http://eab.abime.net/showpost.php?p=734837&postcount=79 (http://eab.abime.net/showpost.php?p=734837&postcount=79) .
Sorry for late reply - being quite infrequntly on EEVblog (sorry Dave).
Cheers
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@pandy - thank you for the doc! Do you happen to know if that humble guy scanned other documents mentioned in his post?
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@pandy - thank you for the doc! Do you happen to know if that humble guy scanned other documents mentioned in his post?
You can view the next page of the thread:
http://eab.abime.net/showthread.php?t=38691&page=5 (http://eab.abime.net/showthread.php?t=38691&page=5)
The EAB ftp site:
http://eab.abime.net/showthread.php?t=43633 (http://eab.abime.net/showthread.php?t=43633)
and their FTP search tool:
http://grandis.nu/eabsearch/ (http://grandis.nu/eabsearch/)
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Hi SilverDream (I assume it is you) - sorry for late reply - to be honest i've registered on forum mostly to provide specification of the 8520.
Some documentation available on EAB and from other sources too.
I have official CBM specifications (mostly from EAB) for IC's: Alice, Lisa, ECS Denise, Gayle, Agnus NTSC, Agnus PAL, VIDIOT, side to this also some IC internal schematics for Agnus (MOS 1983), Alice (those from https://github.com/nonarkitten/amiga_replacement_project ) .
Cheers!