Back in MS-DOS days, we had functions provided with the compiler to do the
conversions between a pointer and a segment:offset description of an address:
void *MK_FP( ushort seg , ushort off );
unsigned short FP_SEG( void *pointer );
unsigned short FP_OFF( void *pointer );
I have the need to do computation like this when accessing an ISA board
(1st 1M of memory) and when translating the addresses from the dual-ported
RAM from what's seen by the CPU on the board to what's seen by the PC (On
the board, the DPM looks like it starts at 0x1000:0 while on the PC it's
at 0xD000:0).
Obviously I could roll my own replacements but before I start doing that I
was wondering if it had already been done -- and probably more elegantly
(and even more correctly) than I could do (at least the first time I do it).
Thanks
Norm
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