Re: Senior PROM uploaded

["William Garber" <willy46pa@garberstreet.com>]

"jonnosan" <jonnosan@gmail.com> wrote in message 801da2bd-6a70-4c4f-a0c7-787b50a24a6d@b1g2000pra.googlegroups.com">news:801da2bd-6a70-4c4f-a0c7-787b50a24a6d@b1g2000pra.googlegroups.com...
: I took the 2 files, and split them each in half then rearranged to
: make a single 16KB standard ROM image, and a single 16KB "Senior PROM"
: image.
:
: I then plugged a ROM emulator into my platinum IIE in place of the
: standard ROM. I could load up the standard ROM, and the system booted
: fine (although when it booted, it says "Apple ][" instead of "Apple //
: e", and I could load and run games fine. Then (while the system was
: still running) I uploaded the Senior PROM image, and rebooted - that
: took me in to the senior PROM image, where I was able to format a disk
: and use the sector editor.

Excellent, as this info will make designing a PCB much easier.

: I then tried to burn the two images into a single 27C256 that I was
: going to fit with a toggle switch to flip between the two images, but
: my eprom burner appears to be cactus, so that will have to wait.

Kool, now I know that I can make a C-F/C2-F2 for my Platinum IIe.

: But it was encouraging that the image didn't seem to have any problems
: running in the platinum iie.

Interesting, being that this code was written for the Beige IIe.

: Next trick will be to try and hack together an NMI switch.

I'll look at it later today and see if I can tell you
how/where it hooks up on the board. I know it's pin 6
of the CPU.

William Garber
Email Address - willy46pa@garberstreet.com
Alt. Email - willy46pa@comcast.net
Web address - http://www.garberstreet.com