I used to code a little bit for the PS1 back during the Yaroze days and did a few demos with a group called Gridlock.
Anyway, just wanted to say hi and give a few zipfiles to the community. I'm attaching two files.
One is the source code to the psx demo Hynopuppy that I wrote back in 1998. The binary is actually included in the psyq zip file in the psxdev.net downloads section under the psyq\bin\OtherTools\ntscpup directory

The second zip file is the source code to the win32 version of gridfix_win.exe which is also included in the psyq\bin\OtherTools directory.
Not sure how well any of this code still works, but you are all welcome to do what ever you want with them.
I did get out my PS1 and Xploder cart and then realized my current system doesn't have a parallel port. Guess I'll have to fix that.
--Gadget