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- Flight Simulator RGB Modifications
-
- By: Andrew Tuline
-
- CIS: 70465,1223
-
- The modifications included herein will allow an RGB
- monitor to show some colours using the Flight Simulator program.
- This modification is not perfect, nor is is very well tested.
- The user should make a copy of their Flight Simulator program
- using their favourite technique. As we know even the most
- obvious methods may elude us. Anyways, one of the bugs is, when
- the user enters the slew mode, the modifications are nullified.
- Basically, the technique is to intercept the disk vector and
- setup a port for the colour display adapter for the needed
- values. I certainly hope, that by disclosing this technique,
- Microsoft doesn't skin my hide. Anyways to modify your extra
- spare disk, boot up debug in DOS 2.0 and type the following:
-
- Note: you need a system with at least 96K to use this
- modification as is.
-
- l cs:0 0 0 1
- a 0
- mov ax,201
- mov dx,0
- mov cl,2
- mov ch,27
- mov bx,1000
- mov es,bx
- xor bx,bx
- int 13
- jmp 1000:0
- w cs:0 0 0 1
-
-
-
- l cs:0 0 139 1
- a 0
- push cs
- pop ds
- mov ax,0
- mov es,ax
- es:
- mov ax,[4c]
- mov [70],ax
- es:
- mov ax,[4e]
- mov [72],ax
- mov ax,48
- es:
- mov [4c],ax
- es:
- mov [4e],cs
- cli
- xor ax,ax
- mov ds,ax
- mov es,ax
- mov ss,ax
- mov sp,c0b0
- mov cx,200
- mov si,7c00
- mov di,500
- sti
- repz
- movsb
- jmp 0:7c18
-
-
- a 48
- pushf
- push cs
- cs:
- mov [74],ax
- mov ax,5b
- push ax
- cs:
- mov ax,[74]
- jmp F000:EC59 <- this is also saved at 1000:0070
- pushf
- push ax
- push dx
- mov dx,3d8
- mov al,0a
- out dx,al
- inc dx
- mov al,20
- out dx,al
- pop dx
- pop ax
- popf
- iret
- w cs:0 0 139 1
-
-
- The value 20 a couple of lines up sets up the colours for low
- intensity cyan/magenta/white. Good luck, and may the colours
- be with you.
- lllllllllllll