| Attachment | Size |
|---|---|
 apple2enh-system_aux_prodosi.cfg | 3.32 KB |
 loadmain.c | 1.04 KB |
Hi! I am working on a version of MadLib for AuxMemApple. It is a ProDOS system program. I load some code to the unused space between $0800 and $1000. Excuting this code seems to crash the system: I get the monitor at location $A504. I can just store this code in the main module, but I like using extra unused system memory via my Cubbyhole optimization technique. :) When I check the size of the data loaded to this memory, I get the number 65088. I'm using ProDOSi to load the data. I attached the config file and the code that loads the data.
Never mind: I found the bug: I was misreading the numbers. The OPEN function was returning Error 64: Invalid Pathname Syntax. The filename accessed was "/SYSTEM/LOWMEM." I will now check if the function is reading the filename properly.
It isn't. :(
The line that calls the load function follows:
loadstub ("/SYSTEM/LOWMEM", 0x800);
I think there's a bug in the compiler, as I had a similar issue on another program of a similar purpose. :( I'm wondering if there is an error in the passing of the parameter, as a memory enhancer for the Plus4 gives me an unknown device error, when I was passing the right device # to the function.
I'm wondering if maybe I'm not protecting the memoy used to store the extra data. I checked the docs. and found the information I need but have one issue: does value 1 determine whether the memory is used or free?