Re: Upgrading the Apple][ to //e

["Bryan Parkoff" <bryan.nospam.parkoff@nospam.com>]

    Good Question.  You can't upgrade from Apple II+ to Apple //e, otherwise
you would have to modify softswitch to support main/aux memory.  How can you
support Double High Resolution on Apple II+?  It is likely to add and modify
IC chips into Apple II+'s motherboard.
    You would have to live with unenhanced Apple //e by moving from Apple
II+ before upgrade to enhanced Apple //e.

-- 
Bryan Parkoff
"Robert Steinmetz" <not-rsteinmetz@mindspring.com> wrote in message
4099970C.4050302@mindspring.com">news:4099970C.4050302@mindspring.com...
> I have my original Apple][ and for a long time when I used it
> every day I was able to keep it up with all of the current
> technology I needed. I eventually moved to a //c and a Laser 128.
>
>
> I am wonder how close I can get i to compliance with a //e.
>
> I change the ROMs to the floating point ROMs and it became
> effectively a ][+
>
> I added a Videx 80 col card and a lowercase adapter, 80columns
> and lower case.
>
> I added a Titan 128k Card.
>
> I added a ZIP chip but there seem to be some issues with that. I
> cant get it to complete diagnostics.
>
> I have a 65c02 for the enhanced instruction set.
>
> What steps can I take to make this machine more compatible with
> the //e?
>
> The major missing elements AFAIK are the enhanced instruction
> set of the 65c02 with the enhanced ROMS and character generator
> chip.
>
> Is this a feasible project and if so does anyone want to help?
>
> -- 
> Rob
>
> "Never ascribe to malice that which can adequately be explained
> by stupidity."