#SSTV interface
09-Oct-88 15:50:14
Sb: #1994-#SSTV interface
Fm: Kelly Jordan 76475,1146
To: Black Belt Systems 76004,1771
Hi Ben,
I should have the currently released interface done tomorrow (if not
tonight). Now if you could be so kind as to upload the eprom contents to
your data library, I could burn the eprom and give it the smoke test – then
hook it up to the printer port and try it out.
Sounds like your new circuit will use the same input circuit as the current
interface, so I may just share that part of the circuit. Could probably get
the 4 Mhz clock from the 6809 if that doesn't load down the oscillator
circuitry in the 6809 too much. I will figure out what all I have to order for
parts when you finalized the design and released it.
Do you think the interfaces would work alright if they had to talk through a
CD4066 to get to the Amiga's parallel port? If I use a few of them, I should
be able to put all three interfaces in one box and have a selector switch to
determine which gets to talk to the Amiga. (Plus route the audio as necessary)
Regarding the eprom's data lines – it is where the lines come off the bus and
go to the D0-D2 pins of the eprom that they get reversed. You have to look
pretty close and trace them out.
This wire wrapping isn't going too bad (so far). It's a shame the sockets are
so expensive.
73, Kelly