From: Jim Brain (brain_at_jbrain.com)
Date: 2007-04-07 19:45:23
I'm not sure I can shed light on whether the ideas presented work, but I
know I tried the transistor idea and some others when I was trying to
emulate the paddle and had no luck.
I resorted to the idea the 1351 mouse uses. (H. Levente and others on
the list actually did the legwork in the RS232 mouse interface discussed
on the list in 2004 or so, I just refined it a bit)
The solution requires a small uController (TINY AVR or PIC of some
vintage) and basically PWMs 5volts into the charge line, while watching
the line for the clamp to 0 volts. By adjusting the uController speed
to match the 64 it is hooked to (my refinement), the I can get about
3-255 on the SID register.
Jim
Message was sent through the cbm-hackers mailing list
Archive generated by hypermail pre-2.1.8.