System Identifiers

Below is a list of identifiers reserved by the compiler and what they do. Reserved words used with the Option command are omitted from this list.

Identifier	Description
Bin	Tells the compiler that a file added with the DataFile should be treated as a binary file.
Byte	Defines a variable to the Byte data type.
Char	Defines a variable to the Char data type.
DataPtr&	Allows you to set the data pointer manually to an address specified either by a variable or an expression.
DM_Blank	Turns the frame buffer of the 32x off.
DM_8bpp	Sets the draw mode for the 32x to 8bpp mode.
DM_15bpp	Sets the draw mode for the 32x to 15bpp mode.
DM_Rle	Sets the draw mode for the 32x to RLE mode.
DoubleInterlace	Used with the VidMode command to enable double interlace mode for the display.
Down	Used to direct the Scroll, Scroll2, and WindowProp commands.
ExtInt	Defines the External Interrupt when dealing with interrupts. Other ways to reference this are External Interrupt, InterruptExternal, InterruptExtInt.
False	Used for conditional statements or setting variables to False.
hInt	Defines the Horizontal Interrupt when dealing with interrupts. Another way to reference this is InterruptHBlank.
HScroll_Cell	Defines the horizontal scroll type to "cell" (8 pixel block) when using the SetScrollMode command.
HScroll_Line	Defines the horizontal scroll type to "line" (1 pixel tall row) when using the SetScrollMode command.
HScroll_Overall	Defines the horizontal scroll type to "overall" (the entire plane) when using the SetScrollMode command.
Integer	Defines a variable to the Integer data type.
Interlace	Used with the VidMode command to enable single interlace mode for the display (default VDP setting).
Left	Used to direct the Scroll, Scroll2, and WindowProp commands.
Long	Defines a variable to the Long data type.
NTSC	Used to set the tv set to NTSC using the TvSet command.
PAL	Used to set the tv set to PAL using the TvSet command.
Prio_32x	Sets the 32x frame buffers to have priority over the genesis/mega drive planes.
Prio_Gen	Sets the genesis/mega drive planes to have priority over the 32 frame buffers.
Right	Used to direct the Scroll, Scroll2, and WindowProp commands.
sbReadByte	The data type to read from SRAM.
sbReadWord	The data type to read from SRAM.
sbWriteByte	The type of write to perform to SRAM.
sbWriteWord	The type of write to perform to SRAM.
Screen	Used to Enable and Disable the video display.
Scroll_A	Used to define the graphical plane when using plane related commands.
Scroll_B	Used to define the graphical plane when using plane related commands.
ShadowOff	Used to turn off ShadowMode.
ShadowOn	Used to turn on ShadowMode.
Signed	Used when defining an Integer variable as Signed.
Sram	Used to Enable and Disable when reading or writing to Sram. This allows ROM's over 2MB to safely access Sram.
String	Defines a variable to the String data type.
True	Used for conditional statements or setting variables to True.
TvBlank	Used to change when the Sleep command ends.
Txt	Tells the compiler that a file added with the DataFile should be treated as a text file.
Up	Used to direct the Scroll, Scroll2, and WindowProp commands.
VDP_CTRL	System variable that points to memory location &HC00004.
VDP_DATA	System variable that points to memory location &HC00000.
Vid32Cell	Used with the VidMode command to turn the display into 32 cell mode (32 tiles wide).
Vid40Cell	Used with the VidMode command to turn the display into 40 cell mode (40 tiles wide).
vInt	Defines the Vertical Interrupt when dealing with interrupts. Other ways to reference this are InterruptVBlankand VBlank.
VScroll2Cell	Defines the vertical scroll type to "2 Cell" (2 tile columns) when using the SetScrollMode command.
VScroll_Overall	Defines the vertical scroll type to "overall" (the entire plane) when using the SetScrollMode command.
Window	Used to define the graphical plane when using plane related commands.
Z80_HALT	System variable that points to memory location &HA11100.
Z80_RESET	System variable that points to memory location &HA11200.