Tandy 1400LT Service Manual page 280

DMA PAGE REGISTER
Address Bit Bit data Description
~~
080H Not used
081H
DMA Page Register for DMA channel 2
0 1
/o
Address A16
1 1
/o
Address A17
2 1/0 Address A 18
3 1
/o
Address A19
4 - 7 X X
082H
DMA Page Register for DMA channel 3
0 1
/o
Address A16
1 1/0 Address A17
2 1/0 Address A18
3 1/0 Address A19
4 - 7 X X
083H DMA Page Register for DMA channel 1
0 1
/o
Address A16
1 1
/o
Address A17
2 1/0 Address A18
3 1
/o
Address A19
4 - 7
X
NMI MASK REGISTER
Address Bit Bit data Description
OAOH 7 0 NMI Mask Register
SYSTEM STATUS REGISTER
Refer to 4-13
F-11