Re: Enhanced //e with a 6503??!

[Sean Fahey <a2fan@hotmail.com>]

BLuRry wrote:
> I recently scored an enhanced //e (verified that it can display
> mousetext and DHGR) -- however, it was sent to me with a processor
> manufactured in mexico, labeled as a 6503.  This would NOT be the
> processor I would expect to find in any apple //e.  For that matter, my
> vulcan controller refused to start, crashing to the monitor at address
> $cc20 or so.  Fortunately, I was able to pop in the zip chip from my
> other //e and everything else was working just great afterwards -- so I
> know that the roms are intact and it can pass the onboard diagnostic
> test.
>
> I read somewhere that the 6503 was a 6502 that could only address 4k of
> memory.  Is this the case?  If so, how the heck would it wind up in an
> enhanced //e manufactured in 1986 and why would it still be in the same
> 40-pin package?
>
> Also, I noticed that this //e (MB dated 1986) has much fewer chips,
> noticably the row of 16 * 4k ram chips (like my 1982 //e) was replaced
> by 2 * 32k ram chips.   The 80-column card (also 1986) seems to work
> fine, but is like half the size of my older 1981 model extended 80-col
> card.  Is it just a reduced chip count because of bigger ram chips as
> well?
>
> Any tips greatly appreciated.
>
> -B

This is in a beige case? Sounds like a last rev IIe motherboard got 
swapped in as a replacement for the original, and it came with the last 
rev 80 column card.

Looks like this, right?

http://tinyurl.com/fbqam

and the mobo looks like this:

http://www.apple2clones.com/?q=node/view/56

A 6503 is just the Rockwell designation for a 65c02, which the 
manufactured under license.