Ampro Corporation 486E - Manual (Page 67)

Product Reference
2–51
Table 2–37. Segment Addressing in Large Memory Devices
Device
Size
64KB
Segments
Segment Address
(Upper Nibble of BH)
128K 2 FIRST BH=00h
SECOND BH=10h
256K 4 FIRST BH=00h
SECOND
BH=10h
THIRD BH=20h
FOURTH BH=30h
512K 8 FIRST BH=00h
SECOND BH=10h
THIRD BH=20h
FOURTH BH=30h
FIFTH BH=40h
SIXTH BH=50h
SEVENTH BH=60h
EIGHTH BH=70h
1M 16 FIRST BH=00h
SECOND BH=10h
THIRD BH=20h
FOURTH BH=30h
FIFTH BH=40h
SIXTH BH=50h
SEVENTH BH=60h
EIGHTH BH=70h
NINTH BH=80h
TENTH BH=90h
ELEVENTH BH=A0h
TWELFTH BH=B0h
THIRTEENTH BH=C0h
FOURTEENTH BH=D0h
FIFTEENTH BH=E0h
SIXTEENTH BH=F0h
Note: For a 128K byte window, use any of the odd
numbered values (for instance, FIRST or THIRD)