IBM RT PC Options Installation page 35

TNL SN20-9864 (May 1987) to 75X0217
Determining Adapter Conflicts
Device/ Adapter
Extended ESDI Fixed-Disk
and Diskette Drive' 2 3
ESDI Fixed-Disk and
Diskette Drive
Personal Computer AT
Fixed-Disk and Diskette
Drive
SCSF
Streaming Tape
X - Required
o -
Optional
( ) - Shareable
The charts on this and the facing page shows interrupt levels and DMA
channels used by various adapters.
Make a list of all the adapters you intend to use in one machine. To the
right of the adapter list create two columns, one for interrupt level and one
for DMA channel.
If any DMA channel appears twice, a conflict exists and must be resolved
using the methods in " Conflicting DMA Channels" on page 1-19.
If an interrupt level appears twice or more, determine whether the
conflicting adapters have changeable or shareable interrupt levels. Then
refer to "Conflicting Interrupt Levels" on page 1-19 and to the installation
text for the conflicting adapters.
3 4 5 6
DX
DX
DX
Interrupt and DMA Usage
7
Interrupt
Level
9 10 11 12 14 15 0 1
(0) (0) FO FO
FX
FX
(0) (0) 0 0
(X)
DX - Required for Diskette
FX - Required for Fixed-Disk
FO - Optional For Fixed-Disk
DMA
Channel
2 3 5 6 7 8
DX FO
DX
DX
0 0 0 0
, Level 6 is used in nonshared mode for compatibility, or levels
12
and
14
can share for a new mode.
20ptional interrupt levels and DMA channels can be set through software.
3DMA Channel
3
is only available when a second Extended ESDI Adapter is used.
1-20 Options Installation