Intel 386 Manuale Utente Scaricare il pdf (Pagina 590)

100

101

D-25

SYSTEM REGISTER QUICK REFERENCE

D.20 DMAOVFE

DMA Overflow Enable

DMAOVFE

(read/write)

Expanded Addr:

ISA Addr:

Reset State:

F01DH

—

0AH

7 0

— — — — ROV1 TOV1 ROV0 TOV0

Bit

Number

Bit

Mnemonic

Function

7–4 — Reserved. These bits are undefined; for compatibility with future devices,

do not modify these bits.

3 ROV1 Channel 1 Requester Overflow Enable:

0 = lowest 16 bits of requester address increment/decrement

1 = all bits of requester address increment/decrement

2 TOV1 Channel 1 Target & Byte Counter Overflow Enable:

0 = lowest 16 bits of target address and byte count

increment/decrement

1 = all bits of target address and byte count increment/decrement

1 ROV0 Channel 0 Requester Overflow Enable:

0 = lowest 16 bits of requester address increment/decrement

1 = all bits of requester address increment/decrement

0 TOV0 Channel 0 Target & Byte Counter Overflow Enable:

0 = lowest 16 bits of target address and byte count

increment/decrement

1 = all bits of target address and byte count increment/decrement

1 2 ... 585 586 587 588 589 590 591 592 593 594 595 ... 690 691

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Intel 386 Manuale Utente Pagina 590

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