3.26 SETUP 3 Tests and Diagnostics
When the Printer Port Mode (see settings below) is set to ECP, the DMA
channel can also be set to 1, 2 or 3. The default is 3.
LPT setting Interrupt level I/O address DMA channel
LPT 1 7 378H 3 (Parallel port default)
LPT 2 5 278H 3
LPT 3 7 3BCH 3
Not Used Disables the port
When you select one of the above options, except for Not Used, a subwindow
similar to the one below appears to let you set the DMA. The options for this
setting are Channel 1and Channel 3 (Default).
DMA = Channel 3 (Default)
OPTIONS
For most printers, the port should be set to ECP. With some other parallel
devices, the setting should be Std. Bi-Direct.
Satellite A20 Maintenance Manual (960-444) 3-81