Hi,
I'm the author of a little OS called EduOS.
I normally use bochs to test my OS.
But, since Plex86 is 'the new Bochs' I decided to try it you.
I use bochs as plugin and everything works except that I can't
scan the memory for its size. Under Bochs this was possible.
When doing so under Plex86 the software crashes.
Here's the source code of the memory scanner (which works fine on my PII
and under Bochs):
extern dword _biosMemorySize; /* size by the BIOS <= 64 MB */
dword getMemorySize () {
dword upperLimit;
/* scan the memory to get the actual memory size */
upperLimit = ceil (_biosMemorySize, PAGE_SIZE);
do {
upperLimit += PAGE_SIZE;
*(byte *)upperLimit = 1; /* try to write 1 */
} while (*(byte *)upperLimit == 1); /* try to read the same 1 */
upperLimit -= PAGE_SIZE; /* because of DO-WHILE loop */
if (upperLimit < _biosMemorySize)
return _biosMemorySize; /* we trust on bios telling the truth */
else
return upperLimit;
}
I think this should be fixed because a memory scan is a very common thing
to do for an operating system at init time.
Is there a patch available for this "bug"?
You can contact me at [EMAIL PROTECTED]
Frank.
