Intel 386 - Manual (Page 383)

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL
12-48
12.3.14 Interrupt Enable Register (DMAIEN)
Use DMAIEN to individually connect channel 0’s and 1’s transfer complete signal to the
DMAINT interrupt request output.
Figure 12-33. DMA Interrupt Enable Register (DMAIEN)
DMA Interrupt Enable
DMAIEN
(read/write) Expanded Addr:
ISA Addr:
Reset State: F01CH
—
00H
7 0
— — — — — — TC1 TC0
Bit
Number
Bit
Mnemonic
Function
7–2 — Reserved. These bits are undefined; for compatibility with future devices,
do not modify these bits.
1 TC1 Transfer Complete 1:
0 = Disables Transfer Complete interrupts.
1 = Connects channel 1’s transfer complete signal to the interrupt
control unit’s DMAINT input.
Note: When channel 1 is in chaining mode (DMACHR.2=1 and
DMACHR.0=1), this bit is a don’t care.
0 TC0 Transfer Complete 0:
0 = Disables Transfer Complete interrupts.
1 = Connects channel 0’s transfer complete signal to the interrupt
control unit’s DMAINT input.
Note: When channel 0 is in chaining mode (DMACHR.2=1 and
DMACHR.0=0), this bit is a don’t care.