It is pitch black... Uh, I mean...
TRILLIAN.COM / PHOBOS.COM allows you to play HITCHHIKER'S GUIDE TO THE
GALAXY or LEATHER GODDESSES OF PHOBOS games under MSX-DOS without
the problem of the system cleaning the screen after every text is
This happens cause the games are for CP/M Plus (aka CP/M 3), while our loved MSX-DOS is only compatible with CP/M up to version 2.2. CP/M Plus has some escape sequence that doesn't work the same way on MSX-DOS and deletes the screen.
Of course you can play with the original files if you use the existing CP/M Plus for MSX. But it's not that handy, specially when on MSX-DOS2 you can have the files on a directory on your SD/MMC/CF card easily. So, those patches solves this. They doesn't patch the games in any way, but the DOS hook itself. This way it avoids the escape sequence when the DOS text printing routine is called from the game.
They also allow configure some extras, like screen colors, font or function key text. More info on the README texts inside the package.
The patch doesn't changes the original files in any way. It only patches the MSX-DOS hook to jump to the patching routine when needed.
To play HITCHHIKER'S GUIDE TO THE GALAXY game or LEATHER GODDESSES OF PHOBOS game, you will need the original files from these games, as they're not provided.
For HHGTTG those files (original CP/M game) are:
for LGOP, those files (original CP/M game) are:
I found some more files (taken from an Amstrad CPC disk), called:
but they're not necessary, it seems.
Below you can see some screens running the game WITHOUT the patch and WITH the patch.