Recently I worked on a patch to JiffyDOS to autoboot if the shift key was on at power up, the idea being that one could use shift-lock to leave the machine in a state where it would always autoboot unattended, but only on demand. I haven't completed it (managed to handle it through warmstart), but was able to get it to work as proof of concept. Time, and lack of spare bytes in the JiffyDOS ROM have so far precluded me from finishing it. A plug for the Easyflash3 thought - it's an awesome product for kernal hacking/development :) email@example.com >Hm, doesn't the VIC-1540 have some rarely used feature with a USR file named >"&" that would automatically boot when turning on the VIC-20? That's still in the 1541 ROMS, as late as 901229-03 which executed this code if ATN (I think) was low when the drive booted - my first 1541 (long gone)(short board) actually had it. Somewhere between -03 and -05 this autoexec code was removed, but the "&" DOS command remains. I suspect the autoexec code was used as a development tool, facilitating a direct bootstrap from disk. Presumably it was removed because it often caused the drive to load the error channel with error 50 (Record not found) on power up - and the drive error LED would flash. Julian Message was sent through the cbm-hackers mailing listReceived on 2013-04-06 00:00:06
Archive generated by hypermail 2.2.0.