DistantStar001 Posted July 29 Share Posted July 29 Just as the title says. I have a Plus 4 that hangs on disk commands (DLOAD, PRINT DS$, LOAD"$",8 and so forth). Essentially, for load commands it says "SEARCHING FOR..." but just hangs there whether the drive is connected or not. RUNSTOP does not interrupt this. Also, when connected to my Pi5141, the buttons on the drive won't work either. The symptoms are present when connected to both the aforementioned Pi5141 and a 1541 floppy drive. Both the Pi and 1541 have been tested with multiple C64s, C128s, VIC-20s and my C16. In each case, the drives behave normally. I tried replacing the TED and PLA since I had working replacements to test, but despite both being tested good in the C16 the symptoms still present in the Plus 4. Any ideas? Quote Link to comment Share on other sites More sharing options...
DistantStar001 Posted July 30 Author Share Posted July 30 Checked BASIC, using a simple "HELLO WORLD!!! " loop and as a two line program, nothing prints on screen. As a 1 line program (10?"HELLO WORLD!!! ";:GOTO 10) works as expected, but RUNSTOP shows a break in line 165. Listing the program also returns: 165 PRINT"HELLO WORLD!!!! ";:GOTO10 Also the power LED cuts out but the computer stays on. Quote Link to comment Share on other sites More sharing options...
DistantStar001 Posted July 30 Author Share Posted July 30 It's the 8501. I just swapped it into my c16 and symptoms followed it. Any ideas on a replacement? I've tried using a 6510 with no luck, and the MonoTech 6502 replacements are no cheaper than an actual 8501 from eBay once you factor in shipping. Quote Link to comment Share on other sites More sharing options...
hofster Posted July 30 Share Posted July 30 (edited) To add to that, the Monotech replacement has some compatibility issues in 8501 mode. I've built some myself and they work better as replacements for 6510. Daniël Mantione has created another 6502 based 8501 replacement which I believe is a bit better than the Monotech one. https://www.freepascal.org/~daniel/8501/ I've built it myself but I don't know if anyone is selling them. There's also an FPGA based replacement which I've heard good things about but I haven't tested it myself and that one is probably even more expensive than the Monotech. https://www.sellmyretro.com/offer/details/30475 Edited July 30 by hofster Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.