Y'all,

What would the difference be between a R6532 and and R6532-II?

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Bill

You should check the manufacturer's datasheet.

Toshi

Well, I tried, but I cannot find a datasheet that mentions the -II variation.

Date codes ate in the mid 80's, but I cannot find a Rockwell datasheet from that era.

_________________
Bill

I have a 1984 Rockwell data sheet for 6500 CPUs -- not for the 6532 RIOT, but you might expect similar numbering schemes.
This sheet details the parts numbers as:

• R65Cxx (eg, xx=02), appended with
• C or P (ceramic or plastic), appended with
• 1, 2, 3 or 4 (1 MHz, 2Mhz etc), appended with
• E or blank (E for extended temperature range)

A 1993 Rockwell CPU datasheet lists:

• R65xx (eg, xx=02), appended with
• A or blank (A = 2Mhz, blank = 1MHz), appended with
• C or P (ceramic or plastic), appended with
• E or blank (E for extended temperature range)

Not much help there, I'm afraid, unless the "II" at the end of your part number is really a "P1" that has gotten defaced. What's the situation you're dealing with? You have a surplus 6532, and wanna know what you can build with it? Or perhaps you need to replace a 6532 from an existing product...?

-- Jeff
PS- the 1993 sheet is for the NMOS product line, which I guess explains the limited frequency range.

Thanks Jeff,

No, It's definitely a -II. And I have 10 of them. There are 2 part numbers on each chip.

R6532P
R6532-II

I have never seen this before, but apparently Rockwell thought it was of some importance.

I'll eventually build a test circuit and can see if this designation has something o do with clock speed, but other than that I can't think of what I might test for.

_________________
Bill

The "II" is not in my 1987 Rockwell data book either. I would guess it's the equivalent of -2 meaning 2MHz.

So, we have one number we understand and one that we don't. My hunch is that those are 1MHz parts, but I admit the "-II" notation remains a mystery. BTW I discovered there's a 6532 entry on Wikipedia. It includes a link to a 1987 Rockwell data sheet. It indicates R6532P is 1 MHz.

The Wikipedia entry says 6532s were used in certain games, so maybe you could flog yours on E-Bay or something. It's not a chip I'd wanna design a project around; I'd rather have a speedy CMOS 65C22. But you may feel differently about that, especially since 6522s have no RAM, and would require a cash outlay.

-- Jeff

No idea here as well. I've never seen it before.

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x86?  We ain't got no x86.  We don't NEED no stinking x86!

I've seen chips with this sort of marking before, with a normal, recognisable marking matching the data sheet and a second, similar but unrecognised part number. Every time, the recognisable number is the one to go by. In your case, this would be R6532P, indicating a 1MHz part in a plastic package. I've never found out exactly what the second number is - I've cynically thought it's simply there to cause confusion!

It may be the R6532-II is a part number used by whoever Rockwell supplied the chips to. 6532 devices used in Atari VCS consoles were sometimes marked with an Atari part number instead of the manufacturer's part number for example.

_________________
Shift to the left,
Shift to the right,
Mask in, Mask Out,
BYTE! BYTE! BYTE!

I checked my riot chip, and i found this strange thing too, but on mine it is a bit different:
C010750-12

R6532-15

MEXICO J
5565 the logo is located here
8439 the logo is located here