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rlstrand
PostPosted: Sat Apr 02, 2016 5:30 pm 
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Posts: 3
I have a tube of chips that came with a couple of AIM 65 computers. They are 24 pin wide body dips, my guess is some ROM, marked: (the @ is actually a copyright symbol)

R322N-12
7678
@ 85 ICD
USD5185-2L
@ ROCKWELL 8611

Any idea what they might be?
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Klaus2m5
PostPosted: Sun Apr 03, 2016 8:14 am 
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Joined: Sat Jul 28, 2012 11:41 am
Posts: 442
Location: Wiesbaden, Germany
The AIM65 ROMs I know of were called R3222-R3226. The last two digits indicate the intended socket z22-z26.

z22-z23 = Monitor (E000-FFFF)
z24 = optional Assembler (D000-DFFF)
z25-z26 = optional Basic (B000-CFFF)

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6502 sources on GitHub: https://github.com/Klaus2m5
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rlstrand
PostPosted: Wed Apr 06, 2016 4:28 am 
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Joined: Sat Apr 02, 2016 5:18 pm
Posts: 3
Yes I have those ROMs. Just wondering what the unknown one is.
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BigEd
PostPosted: Wed Apr 06, 2016 7:49 am 
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Joined: Thu Dec 11, 2008 1:28 pm
Posts: 10986
Location: England
Hi ristrand, and welcome - could you dump the ROM and post it? Could be interesting, and could yield some clues.
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rlstrand
PostPosted: Thu Apr 14, 2016 1:32 am 
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I have had the rom copied. Will post soon. Only text we saw on a quick scan was ICD in a copyright notice near start of the rom. And something about a disk near the end.
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BigEd
PostPosted: Thu Apr 14, 2016 8:12 am 
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Location: England
Great - look forward to having a look at that!
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