Intel 386 - Manual (Page 588)

D-23
SYSTEM REGISTER QUICK REFERENCE
D.18 DMAMSK
DMA Individual Channel Mask
DMAMSK
(write only) Expanded Addr:
ISA Addr:
Reset State: F00AH
000AH
04H
7 0
— — — — — HRM 0 CS
Bit
Number
Bit
Mnemonic
Function
7–3 — Reserved; for compatibility with future devices, write zeros to these bits.
2 HRM Hardware Request Mask:
0 = Unmasks (enables) hardware requests for the channel specified by
bit 0.
1 = Masks (disables) hardware requests for the channel specified by
bit 0.
NOTE: When this bit is set, the channel can still receive software
requests.
1 0 Must be 0 for correct operation.
0 CS Channel Select:
0 = The selection for bit 2 affects channel 0.
1 = The selection for bit 2 affects channel 1.