What is the definitive way to check which Rev your Apple II is?

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Joined: Jan 17 2017
Posts: 18

Hey everyone,

I'm brand new to the forum, so apologies if I'm asking a question that could easily be Googled... I did search around for a good hour before coming here to post Smile

What is the definitive way to check which Rev your Apple II is?

I know you can look under the 6502 IC for some Apple II's, but I'm not sure what the codes underneath actually mean e.g. How is Rev0 represented under the IC?

Thank you in advanced, I'm very excited to have joined this forum!

-AC

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macnoyd's picture
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Joined: Oct 15 2012
Posts: 224
Re: What is the definitive way to check which Rev your Apple ...

I like your new handle ...

The REV is listed to the left side of the motherboard, but along with the Rev. number is also a
4 or 5 digit production number which is located above the power plug. (back-left of PCB)
If you have a ][ or ][ Plus, you have "essentially" the same machine. Only engineering improvements
between them but the overall function is pretty much the same, sans the Integer or Applesoft ROMS.

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macnoyd

gsmcten's picture
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Posts: 2616
Re: What is the definitive way to check which Rev your Apple ...

Apple2,

Welcome to the land of the 'Fritter Critters!

Steven Smile

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Steven (gsmcten)

"Apple ][.....It's ALIVE!!!!!"

MarkO's picture
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Joined: Dec 10 2011
Posts: 667
Re: What is the definitive way to check which Rev your Apple ...

Apple2 wrote:

Hey everyone,

I'm brand new to the forum, so apologies if I'm asking a question that could easily be Googled... I did search around for a good hour before coming here to post Smile

What is the definitive way to check which Rev your Apple II is?

I know you can look under the 6502 IC for some Apple II's, but I'm not sure what the codes underneath actually mean e.g. How is Rev0 represented under the IC?

Thank you in advanced, I'm very excited to have joined this forum!

-AC

Here is what I know.. ( I own a Rev-03 Apple ][ and an Apple ][+ with a Rev-01 Board.. )

For Rev-00 to Rev-04, the number under the CPU is Rev indication.. ( e.g. Rev 03 is "820-0001-03", Rev 01 is "820-0001-01" ) and Starting with Rev-04, there will be a "REV 04" on the Mainboard, by Slots 4 & 5, visible without removing the CPU.

With Rev-07 boards, the Rev Indicator is on the Left Side, like macnoyd mentioned..
Also the RAM Block are gone on the Rev-07 Boards.. So if you have the RAM Blocks, ( e.g. 4K or 16K ) on the Left Edge, you have a Rev-00 to Rev-04 Mainboard.

Please view my two systems here:
http://tech.markoverholser.com/?q=node/11

MarkO

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Joined: Oct 9 2011
Posts: 1057
Re: What is the definitive way to check which Rev your Apple ...

Rev-0 are easy. No Colour Killer transistor and large prototyping area.

Then it's down to the are the slots dark or light to determine if it's newer or older. Light green are the older Rev-0 PCBs.

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Joined: Jan 17 2017
Posts: 18
Re: What is the definitive way to check which Rev your Apple ...

You guys are awesome, thanks so much for all the helpful info - I'm pretty sure I may have just missed out on a Rev0 being that my SN is in the mid 6000's, oh well! I will let you know when I get the right tools - I have a bunch of ESD safe stuff on it's way so I can safely check the board over, it would be very interesting if my post-6000 Apple ][ is a Rev0, but I'm not going to hold my breath! Wink