IBM RT Series Hardware Reference Manual page 323

Memory Mapped Memory Areas
(0,0)
768
784
080000
(0,767)
097F80
ACTIVE
DISPLAYABLE BIT MAP AREA
1024 X 768
SCROLL AREA
TNL SN20-9844 (March 1987) to 75X0235
(1023, 0)
D8007E
(1023,767)
097FFE
768 bits
high
HARDWARE
ADDITIONAL CURSOR PATTERNS
848
896
1006
1007
1008
1009
CURSOR IMAGE
"AND"I "XOR"
START---"
FONTS AND STACK AREA
QUEUE LIST AREA
HARDWARE RESERVED SCAN LINE AREA
HARDWARE RESERVED SCAN LINE AREA
SCROLL AREA
(0, 1023)
~START
256 bits
high
(1023,1023) INCLUSIVE
Figure 4. 1M-Pel Bit Map Frame Buffer (Suggested Area Usage)
Extended Monochrome Graphics Adapter 11