PORTIBM PC Portable (uses same BIOS as XT) 52EE-52EF - ATI Mach32 - SCRATCH REGISTER 0 (USED FOR ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. LOCATION)
Note:	ATI video BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. sets this port according to the segment address of the
	  BIOS(Basic Input/Output System) A set of standardized calls giving low-level access to the hardware.  The BIOS is the lowest software layer above the actual hardware and serves to insulate programs (and operating systems) which use it from the details of accessing the hardware directly. if >= C000h, as ((seg-C000h) shr 7)
SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 56EEh"Mach32"

52EEw RW  scratch register 0: Video ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. address