can not use screenRes on terminal

[Gablea]

Hi everyone,

Does anyone know what a RMCB error is?

I am trying to set a screen to 640x480 (via screenres 640,480 and SCREEN 12 ) under MS-DOS 6.22 but the PC crashes with a RMCB Error

if I start to print to the screen WITH OUT setting any screen sizes it works fine

but the PC reports it can handle resolutions up to 1024x768

am i loosing my grip on reality or am I doing something MARJORY WRONG here

[fxm]

RMCB = real-mode callback ???

- Have you tested it without ScreenLock/ScreenUnlock instruction ?
- Have you tested it without mouse driver installed ?

[Gablea]

tested with out mouse (as this is a keyboard only system)
and yes tried with out screen lock and unlock command and it works

This is pure DOS

if I use the following code

Code: Select all

	ScreenLock
		Color 1,1
		Cls
		Color 15,0
		Print "Hello"
		Color 0,15
		Print "TEST"
		Color 5,8
		Print "TEST COLOR again"
	ScreenUnLock

it is happy and displays a blue background with the correct colored text but if I add ScreenRes 640,480 that is when the app crashes and displays the RMCB error

[1000101]

Make sure that your terminal meets the system requirements for gfxlib2. If you are having issues with unexpected crashes you could have buggy drivers, stub drivers or non-existent drivers. Ideally you will want VESA 2.0 compliant drivers. Beware that some hardware ROMs come with "stub" VESA implementations. They are enough of an implementation to report on the hardware installed but not enough to actually control and use it. UniVBE can be used on most hardware configurations to provide the best results.

GfxLib Overview