EPROM programmer

[Ethan Dicks]

On Fri, Feb 15, 2008 at 02:57:08AM -0500, Roy J. Tellason wrote:
> > Depending on which model of CBM you have, there's a no-adapter
> > solution...

> Hmm.  I wasn't thinking PET as much as C64,  when I wrote that.  The ROMs in 
> that one were all 24-pin parts,  a 4K character rom and the BASIC and Kernal 
> being 8K,  which would need a 2764.

Ah... yes.  That's entirely different.
 
> I can see how you'd stack a couple of sockets to connect the pins you wanted 
> to connect,  but am a little less clear about the other ones.  Like if you 
> wanted to interrupt a signal going through -- just bend it out?  Maybe I need 
> to look at the pinouts of those parts...

You poke out the pin in the middle socket, then you have the room to solder
to the upper socket pin and run a wire to the relevant lower socket pin.

I built a 2764->2732 adapter that does some fiddly stuff with the two or
three pins at the top of each of the sockets (Vpp, Vcc - those sorts of
pins).

-ethan
 
-- 
Ethan Dicks, A-333-S     Current South Pole Weather at 15-Feb-2008 at 13:20 Z
South Pole Station
PSC 468 Box 400       Temp  -29.4 F (-34.1 C)   Windchill   -54.9 F (-48.3 C)
APO AP 96598          Wind   10.9 kts Grid 33   Barometer 682.1 mb (10549 ft)

Ethan.Dicks at usap.gov            http://penguincentral.com/penguincentral.html