sicklittlemonkey wrote:
> On Feb 25, 12:09 am, Steven Hirsch  wrote:
>> Does anyone know if the MMI PROM on older Disk ][ controllers has the same
>> pinout as any of the 74S* programmable PROMs?  I'd like to read
the contents,
>> but would prefer not to let the magic smoke out of my programmer.
> 
> You can swap the P6 sequencer PROM with the P5 boot PROM to read it
> from inside the Apple II as they are both 6309 parts. The address line
> mappings are different, so you need to compensate for that.
> 
> This is described in great detail, with a program to decode the
> sequencer PROM and full listings of the DOS 3.2 and 3.3 PROMs in
> Sather's "Understanding The Apple II", p9-16.
> 
> I've been playing with this stuff for a while, so if you want the
> files I can mail them to you, including Sather's program (and perhaps
> some of my own depending on what you need).

I'm actually trying to kill two birds with a single stone.  In addition to my 
curiousity about the PROM contents, I need to test my new device programmer to 
ensure it's reading these old devices properly.

So, I'd still like to know what device to setup for in order to examine them.
--- SBBSecho 2.12-Win32