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Dr Jefyll
PostPosted: Sun Aug 28, 2022 3:38 pm 
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Hello, all. Can anyone supply or link me to a datasheet for the (now obsolete) W65C02 microprocessor from Western Design Center? Newer versions have an 'S' suffix (as in W65C02S) which denotes fully static operation, but I believe an older, non-S version of that chip exists.

(I had no luck here on 6502.org in the section Documents > Datasheets > Western Design Center > Older Versions ) Thanks,

Jeff

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https://laughtonelectronics.com/Arcana/ ... mmary.html
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GARTHWILSON
PostPosted: Sun Aug 28, 2022 4:11 pm 
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The oldest I have is 1992, and it has the S.

Originally they did not have the Rockwell instruction additions yet, RMB, SMB, BBS, and BBR, and at some point, WDC added a B (for "having the Bit instructions") to denote those later to tell the difference, then took the B back off, saying, "From now on, they'll all have those instructions, so we don't need to tell which ones do and which ones don't."

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GaBuZoMeu
PostPosted: Sun Nov 27, 2022 1:06 am 
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Perhaps one of these may help...

Cheers,
Arne


Attachments:
W65C02-1991-03.pdf [2.34 MiB]
Downloaded 30 times
W65C02-1990-02a.pdf [1.2 MiB]
Downloaded 27 times
W65C02-1990-02.pdf [2.32 MiB]
Downloaded 32 times
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BigDumbDinosaur
PostPosted: Sun Nov 27, 2022 5:10 am 
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Dr Jefyll wrote:
Hello, all. Can anyone supply or link me to a datasheet for the (now obsolete) W65C02 microprocessor from Western Design Center?

I believe you are looking for this:

Attachment:
File comment: W65C02 Data Sheet (Feb 1990)
65c02-1990.pdf [2.32 MiB]
Downloaded 30 times

That is the data sheet from which I was working 32 years ago when I was designing firmware for a 65C02-powered terminal server.

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BigDumbDinosaur
PostPosted: Sun Nov 27, 2022 5:14 am 
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Oops! I just noticed GaBuZoMeu post before I did. His third attachment is the same as what I posted.

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BigDumbDinosaur
PostPosted: Sun Nov 27, 2022 5:22 am 
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GARTHWILSON wrote:
[color=#000000]The oldest I have is 1992, and it has the S.

Originally they did not have the Rockwell instruction additions yet, RMB, SMB, BBS, and BBR, and at some point, WDC added a B (for "having the Bit instructions") to denote those later to tell the difference, then took the B back off, saying, "From now on, they'll all have those instructions, so we don't need to tell which ones do and which ones don't."

The Rockwell extensions were added c. 1992, which is when the 65C02 was converted to a static core.[/color]

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