Posted By
MIK
on 2014-09-04
13:18:27
 |  Re: New to Plus4 scene - Introduction and SD2IEC and 1541 loading issues
Hi and a warm welcome. 
I still don't have one of these drives yet so can't comment as to why, however...
Some Demo's can be 1551 only meaning they will only run on that drive or under emulation so it's always worth asking if you have no luck. Hopefully some one knows.
There might be the odd .PRG file still out there that has been saved wrong meaning it will be one bite out in memory once loaded so won't work. This is not something an emulator worries about and why they do work on them. On the real machine a small handful of say 12k games may of been saved from $1000-$4000 which is a common mistake which back in the early days you would see a lot when it should of been saved from $1001-$4000.
In cases like this if a .PRG fails to work once loaded from Basic then after a reset, enter the Machine code MONITOR,
M(SHIFT)O
and then type: L"FILE NAME",8
Type X to return back to Basic once it's loaded and hopefully typing RUN will make it work.
If you ever find a prg like this then load it in to Yape, it will say where it is loaded in memory, (from $XXXX and too $XXXX), then just re-save it where Yape says it should be saved from and too. Yape will want to save from $1001 correcting the mistake.
|
