Re: Apple //e Upgrade Failed?

["Michael J. Mahon" <mjmahon@aol.com>]

Bryan Parkoff wrote:
>     I have unenhanced Apple //e.  The model is A2S2064.  The serial number 
> is 1A2S2-D44 0HDK A2S2064.  I replaced from original video ROM chip to new 
> one which it includes MouseText, but it is still in unenhanced Apple //e. 
> It is working fine.
>     I tried to swap from 6502 CPU to 65C02 CPU while CD-EF ROM chips are 
> still unenhanced Apple //e, but it failed to work.  The screen is black 
> nothing.  Also, I tried another 65C02 CPU from Zip Chip to be installed.  It 
> did not work and the screen is still black.  It works fine on Apple II+.
>     Do you have a clue what it is causing?  If I get it working correctly, I 
> will swap CD-EF ROM later to be enhanced Apple //e.

It should work.  Something else is broken.

Even without the processor, the video generator should be working,
so it sounds like the clock is shorted...

(Are you sure you plugged the processor in with the correct
orientation?  Its notch should be toward the keyboard.)

I hate to bring up the possiblity of ESD...  ;-(

-michael

Music synthesis for 8-bit Apple II's!
Home page:  http://members.aol.com/MJMahon/

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