Z
[email protected]
- Jan 1, 1970
- 0
Tried this in comp.arch.embedded, moving my search further afield...
I'm trying to build a PDP-1 emulator on a 90x55mm business card. As
readers skilled in the art will appreciate, this is an eminently
practical project, the general applicability and consumer utility of
which are precisely commensurate with the profits I expect to realize
from the endeavor.
The front side of the card contains the front panel. 0603 LEDs for the
lamps are fine, but I am having trouble finding switches small enough.
Smallest tact switches I can find are 6x3mm. Can anyone point me to
smaller tact switches? My other option is 0.050" spacing DIP switches,
which are harder to operate and have a shorter lifespan.
An old photo of the original:
http://www.dbit.com/~greeng3/pdp1/PDP1.10.jpg
my current mechanical test layout (missing address and test word
switches):
http://www.larwe.com/pdpcard.gif
and a 1:1 scale printout of the layout in my hand:
http://www.larwe.com/PDRM1836.JPG
(As with the real computer, the electronics and power supply are behind
the front panel. The emulator is implemented in a 60MHz ARM7).
I'm trying to build a PDP-1 emulator on a 90x55mm business card. As
readers skilled in the art will appreciate, this is an eminently
practical project, the general applicability and consumer utility of
which are precisely commensurate with the profits I expect to realize
from the endeavor.
The front side of the card contains the front panel. 0603 LEDs for the
lamps are fine, but I am having trouble finding switches small enough.
Smallest tact switches I can find are 6x3mm. Can anyone point me to
smaller tact switches? My other option is 0.050" spacing DIP switches,
which are harder to operate and have a shorter lifespan.
An old photo of the original:
http://www.dbit.com/~greeng3/pdp1/PDP1.10.jpg
my current mechanical test layout (missing address and test word
switches):
http://www.larwe.com/pdpcard.gif
and a 1:1 scale printout of the layout in my hand:
http://www.larwe.com/PDRM1836.JPG
(As with the real computer, the electronics and power supply are behind
the front panel. The emulator is implemented in a 60MHz ARM7).