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
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