Posted By
IstvanV
on 2007-06-12
11:58:23
|  Re: plus4emu 1.1.1 release
It does not use the $eda9 routine directly, however, it does use LISTEN repeatedly while loading data to the 1541 RAM with the M-W command, and that calls $eda9. One place where I have encountered the crash is this:
http://plus4world.com/dl/screenshots/i/infinity_13.gif
It is the large "Vision" logo at the top that contains many $55 bitmaps, and with bad luck the TED might just read one of those when the parallel bus test is done, leaving that value floating on the data bus. Maybe if I make small changes to the floppy timing in plus4emu, the frequency of crashes would be reduced.
If this type of problem is the only reason why crashes could occur, then the demo should probably never crash in YAPE, since that does not emulate the hardware behavior that makes the $eda9 routine fail.
|
