Is there a way to convert a DEBUG patch to a byte one? \ VOGONS

Is there a way to convert a DEBUG patch to a byte one?

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First post, by keropi

Posted on 2017-07-01, 19:22

keropi Offline

Rank l33t++

Rank: l33t++
Posts: 9264
Joined: 2003-09-08, 06:45
Location: Greece

Hiya!

I started using an EGA/VGA combo card in my 286/EGA setup and Supaplex detects it as a VGA card even though the card is jumpered as an "EGA PURE" one (and working with a true EGA monitor) . So in the Supaplex SpeedFix documentation there is info on how to force EGA mode in the original non-patched game:

1 +------------------------------------------------------------+
2 | HOW TO FORCE THE EGA MODE WITH THE ORIGINAL SUPAPLEX CODE: |
3 +------------------------------------------------------------+
4With one additional line, the above batch job can also force the video mode
5on VGA cards to run as if it runs with an EGA card, and with debug mode on.
6The behavior and the colors of Supaplex are totally different now.
7Different code is used in the program, and the standard 16 colors are used in
8stead of using the VGA palettes for nicer colors.
9@echo off
10echo g33 > supaplex.deb
11echo t >> supaplex.deb
12echo g103 >> supaplex.deb
13echo t >> supaplex.deb
14echo ecs:5378 0 >> supaplex.deb
15echo ecs:a040 1 >> supaplex.deb
16echo g >> supaplex.deb
17echo q >> supaplex.deb
18debug supaplex.exe < supaplex.deb
19del supaplex.deb
20June 15, 2007 SPFIX63a.DOC Page 32 of 50
21
22The EGA mode is switched on with the line: echo ecs:5378 0 >> supaplex.deb
23The debug mode is switched on with the line: echo ecs:a040 1 >> supaplex.deb
24The lines with g33,t,g103,t are to persuade Supaplex to unpack itself.
25Supaplex has to be unpacked, since the debug byte is inside of a packed block.

I tested with the "ecs:5378 0'" option only since I have no interest in the debug mode and it works fine. I unpacked the EXE with UNP but how do you translate the "ecs:5378 0" command? I looked some debug help online and it appears this is a search-and-replace function in a ram location but that's as far as I went 🤣
Any tips on how to proceed? 😊 TIA!

🎵 🎧 ⏳ ⚡ PCMIDI MPU , OrpheusII , Action Rewind , Megacard and 🎶GoldLib soundcard website

Reply 1 of 1, by keropi

Posted on 2017-07-02, 15:00

keropi Offline

Rank l33t++

Rank: l33t++
Posts: 9264
Joined: 2003-09-08, 06:45
Location: Greece

Further testing proves that this behavior is due to the card getting detected as VGA (even though it's jumpered for VGA) as there are more games with issues.
So it would be nice to know if this can be patched on the game but it's not that important anymore 🤣

🎵 🎧 ⏳ ⚡ PCMIDI MPU , OrpheusII , Action Rewind , Megacard and 🎶GoldLib soundcard website

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