IBM RT PC Options Installation page 43

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