Texas Instruments TMS320C3 Series, User Manual, Page: 117 / 166

Invoking the Debugger
7-3 Using the DSK Debugger
Selecting the parallel printer port (LPT = 3 or LPT# option)
The LPT option selects a parallel printer port from the host to communicate
with the DSK.
Parallel Printer Port Functions
LPT1 or LPT = 1 Selects printer port hardware at I/O address 0x378.
LPT2 or LPT = 2 Selects printer port hardware at I/O address 0x278.
LPT3 or LPT = 3 Selects printer port hardware at I/O address 0x3BC.
Note:
Some EISA machines and IBM PS/2s use a different naming convention for
the LPTx.
AT Convention EISA and PS/2 I/O Address
LPT1 LPT2 ox378
LPT2 LPT3 0x278
LPT3 LPT1 0x3BC
Select the parallel printer port at a particular address (PORT option)
The port option selects the parallel printer port at the given address. For exam-
ple:
port = 0x378
selects the host’s parallel port mapped to the address 0x378.
Note:
Use this option with extreme care since any base address can be used.
Automatically search for a printer port (TEST option)
Use the test option to systematically search for a parallel port that has a DSK
connected. The search loops through LPT1, LPT2, and LPT3.
Note:
If you have a printer port or other peripheral connected to your PC, turn it off
before using the test option.