Spectrum Digital, Inc
1-5
Setting up the XDS510PP.INI file
The xds510pp.ini file is used to set driver parameters. The “.INI” should be located in
the same directory as the HLL Debugger. The D_DIR environment variable is used to
select the Debugger directory. If the xds510pp.ini file doesn’t exist or can’t be found
certain parameters are used as default. Shown below are the parameters and their
defaults.
speed = 25
mode = spp4
port -p command line parameter, or 240 if no command line
When the xds510pp.ini file is invoked there are four parameters which can be used.
These parameters are: speed, port, mode, and timing.
The ‘speed’ parameter selects the amount of delay between port accesses. The higher
the value the more delay added. A good value to start with is 25.
example: speed = 25
The ‘port’ parameter selects the PC’s printer port. The default value is 378. Other
values are 278 and 3BC.
example: port = 278
The mode parameter selects the type of hardware supported by the host PC. The three
modes are shown in the table below:
The “spp4” mode should work on all machines, but is the slowest. The “spp8” mode
requires a bidirectional parallel port. The “epp” mode is the fastest but requires an EPP
compatible parallel port on the host PC. If you are using EPP mode you must make
sure the PC is configured for EPP operation. Check the documentation that came with
the PC or add-in card on how to configure the parallel port. The default mode is “spp4”.
example: mode = epp
Table 1: Parallel Port Modes
Modes
Description
spp4
standard parallel port
spp8
bi-directional port
epp
enhanced parallel port
