IBM RT PC, Options Installation

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Section 1. Getting Started 1-21
Interrupt and DMA Usage
Device/Adapter
Interrupt
Level
DMA
Channel
3 4 5 6 7 9 10 11 12 14 15 0 1 2 3 5 6 7 8
Extended ESDI Fixed-Disk
and Diskette Drive
1 2 3
DX (O) (O) FO FO DX FO
ESDI Fixed-Disk and
Diskette Drive
DX FX DX
Personal Computer AT
Fixed-Disk and Diskette Drive DX FX
DX
Portable Disk Drive
(Primary Position)
DX (O) (OD) FO FO DX
Portable Disk Drive
(Secondary Position)
DX (O) (OD) DX FX
SCSI
2
(O) (O) O O O O O O
Streaming Tape (X)
Enhanced Graphics
4
X
Mono./Printer X
Multiprotocol (O) (O) OD O
Token-Ring (O) (O) O OD O O
3278/79 Emulation
4
X
5080 Attachment
5
(X) O OD O
S/370 Host Interface
5
(X) OD O O
OD - Optional Default (Shipped with this Setting)
X - Required DX - Required for Diskette
O - Optional FX - Required for Fixed-Disk
( ) - Shareable FO - Optional For Fixed-Disk
1
Level 6 is used in nonshared mode for compatibility, or levels 12 and 14 can share for a new mode.
2
Optional interrupt levels and DMA channels can be set through software.
3
DMA Channel 3 is only available when a second Extended ESDI Adapter is used
4
The enhanced graphics adapter (EGA) and 3278/79 Emulation adapter may be used together; at this printing, there is no
known program that uses interrupt level 9 on the EGA.
5
The 5080 attachment adapter and the S/370 host interface adapter are designed to operate together at the defined default
values. If these adapters are reconfigured for other optional DMA channels, the user must provide driver/application
software.