This patch is meant to simplify the programming of the parallel port 4-player
adapter, by mapping it to port 2 and 3 of LowLevel.library that are
normally unused.
It patches the ReadJoyPort() and SetJoyPortAttrsA() functions. The latter is
simply a wrapper around the original function that always returns success for
ports 2 and 3.

Installation:

Copy "ll4player" into the C: drawer, and add the following line to your
Startup-Sequence or User-Startup:

C:Run >NIL: C:ll4player

The patch takes control of the parallel port, so yo need to remove it before
using any other parallel port device (printer, sampler, etc.).

To test the patch, you can use the included "llporttest" utility. It simply
prints the bitfield for ports 0-3 and interprets them.

The source code for both programs is included, which can be compiled with VBCC
or GCC.

PERMISSION  UID  GID    PACKED    SIZE  RATIO METHOD CRC     STAMP     NAME
---------- ----------- ------- ------- ------ ---------- ------------ ----------
[unknown]                  912    1612  56.6% -lh5- fa41 Sep 29 18:42 ll4player
[unknown]                  634    1154  54.9% -lh5- bea0 Sep 29 20:04 ll4player.readme
[unknown]                  759    1416  53.6% -lh5- 189d Sep 29 20:02 llporttest
[unknown]                 1890    6560  28.8% -lh5- 114f Sep 29 18:42 src/ll4player.c
[unknown]                  837    2395  34.9% -lh5- 3b89 Sep 29 20:02 src/llporttest.c
[unknown]                  152     254  59.8% -lh5- cf1a Sep 29 19:58 src/Makefile
---------- ----------- ------- ------- ------ ---------- ------------ ----------
 Total         6 files    5184   13391  38.7%            Oct  1 18:41