Hi all, I got my "Wifi Modem" device working with the SX-64, thanks for the help! (The trick was to lower my current limiting to 100 ohms). I've found a new issue, unique to the 128D and related to the UP9600 hack. The symptom is that with my device plugged in, the 128D's built-in 1571 immediately goes to an error state (activity LED flashing constantly) and I can't even read the error channel (PRINT DS$ returns blank). This does *not* happen with a flat 128 and external 1571, so it's something related to the 128D - I'm aware the 128D's 1571 has a newer ROM revsion (3.1 vs. 3.0) and there is probably an electrical reason here. Here's the schematic for my device: http://i.imgur.com/OVkLEMG.png I've found that if I disconnect Pin 5 ("Serial Port 1, from CIA #1") it works. With the UP9600 baud hack, Pin 5 is looped back to Pin M (TxD). This is the root of the issue but I'm not sure why. With other RS232 adaptors (like Jim's EZ232) that support the UP9600 hack, looping back Pin 5 to Pin M (via jumper) does not cause the issue. Also, as mentioned this doesn't occur in a flat 128 and external 1571. So I'd like to understand what the issue is before blindly adding a jumper. More details on my modem: https://jammingsignal.wordpress.com/commodore-wi-fi-modem/ Thanks for any help! -Leif -- Leif Bloomquist | leif@schemafactor.com | +1 416-737-2328 | Check out my blog! http://www.jammingsignal.com "Every choice, no matter how small, begins a new story." - xkcd Message was sent through the cbm-hackers mailing listReceived on 2016-01-11 17:00:49
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