OpenRakis / VGA-Mode-X-Scrolling

Template for developing VGA Mode X Scrolling games under DOS

VGA Mode X Scrolling

This project aims to be a template for the following:

• Setting up the tweaked VGA Mode 13 known as Mode X that allows for a 320x240 display with square pixels under DOS
• Routines for quickly blitting bitmap images from main memory to VRAM
• Smooth hardware scrolling across an infinite-sized map

Requirements

• Open Watcom C/C++ Version 2.0
• DOS-based environment (MS-DOS, FreeDOS) to run the builds
• 32-bit x86 CPU (80386 or better)
• DOS/32 or DOS4GW 32-bit DOS extender

How To Build

• Place a copy of your 32-bit DOS extender of choice (dos32a.exe or dos4gw.exe) in the root directory of the project
• Update make.bat with your 32-bit DOS extender of choice

SET WCL386=-zdp -wcd=138 -ecc -4s -mf -fp3 -od -d2 -bt=dos -l=dos32a
REM SET WCL386=-zdp -wcd=138 -ecc -4s -mf -fp3 -od -d2 -bt=dos -l=dos4g

• Run make.bat

ATTRIBUTIONS

A lot of this code is loosely based on several sources, most derived from Michael Abrash's works featured in Graphics Programming Black Book.

The following projects have been used as references:

• David Brackeen's 256-Color VGA Programming in C (http://www.brackeen.com/vga/)
• @mills32's Little Game Engine for VGA (https://github.com/mills32/Little-Game-Engine-for-VGA)
• @64Mega's Venture-Out! LD44 project (https://github.com/64Mega/ld44-venture-out)
• @root42's Let's Code MS-DOS series (https://github.com/root42/letscode-breakout)

TODO

• TODO

LICENSE

All source code + files outside of the /res folder adheres to the MIT License