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Int 15 Fn C9 - Newer Ps/2; Various BIOSes - Get CPU Type And Mask Revisi [B]
AH = C9h
AL = 10h (may be required on some non-PS BIOSes)
Return: CF clear if successful
AH = 00h
CH = CPU type
03h 80386DX or clone
04h 80486
23h 80386SX or clone
CL = mask revision (stepping level)
80386:
03h B1
05h D0
08h D1/D2/E1
80386SX:
04h A0
05h B
08h C/D1
CF set on error
AH = status (80h,86h = function not supported)
Notes: the BIOS must save DX at startup in order to be able to support this
call; PS/2 Models 56, 57, 90, and 95 are known to support it
the PS/2 BIOS merely reads CMOS locations 190h (type) and 191h (rev)
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