Toshiba satellite A20 series Maintenance Manual page 192

3.26 SETUP
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
LPT 1
LPT 2
LPT 3
Not Used
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).
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)
Interrupt level
7
5
7
Disables the port
OPTIONS
DMA = Channel 3 (Default)
3 Tests and Diagnostics
I/O address DMA channel
378H 3 (Parallel port default)
278H 3
3BCH 3
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