Re: Senior PROM uploaded

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

"William Garber" <willy46pa@garberstreet.com> wrote in message V_Gdnes4-I2828nanZ2dnUVZ_hGdnZ2d@comcast.com">news:V_Gdnes4-I2828nanZ2dnUVZ_hGdnZ2d@comcast.com...
:
: Ok, I ripped the code from the eproms, and
: uploaded them along with documentation that
: was provided and discovered online in the
: 'Senior_PROM' folder on my site.
:
: I'm still looking at the board to see how
: it is set up and I think that you can get
: the 4 halves to work in any combo of 1st
: half of one with second half of the other.
:
: IE; CD1-EF1, CD1-EF2, CD2-EF1, CD2-EF2.

After reading page 11 in the file:

"Senior_PROM_V3.pdf"

I realize that only the 2 lower halves, or
the 2 upper halves are active at one time.

One is the standard IIe ROM (lower), and
the other (upper), the Senior PROM.

While the switch changes between the two,
the NMI button automatically will activate
the Senior PROM.

Now to get permission from the owner to
disassemble the board for the schematic.

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