Words by Category: Memory Access Words

Words in category Memory Access Words in glossary TurboForth Kernal

Search:

The following words are listed in this category (23 words found):

Word Types: S = Standard, I = Immediate , IC = Immediate-compiling.

Word Name	Word Type	Data Stack Signature	Return Stack Signature	Description	Availability
Word Name	Word Type	Data Stack Signature	Return Stack Signature	Description	V1.0	V1.1	V1.2
!	S	value address --	--	Writes value to the cell at address.
@	S	address -- value	--	Pushes the value read from address to the stack.
@++	S	address - address+2 value	--	The cell at address is read and the value pushed to the stack, above the address. Address is incremented by 2, ready for `@++` to be called again. Note, TurboForth V1.0 has a different stack signature. Please see comments.
+!	S	value address --	--	Read the cell at address, adds value to it and stores the result at address.
>MAP	S	bank address --	--	Maps bank number bank into memory at address address. SAMS 1MB memory expansion required.
0!	S	address --	--	Store 0 to the cell at address.
C!	S	char address --	--	Store lower 8 bits of char to address. (Byte write)
C@	S	address -- n	--	Read byte at address. The upper 8 bits of the cell on the data stack are 0. The lower 8 bits contain the value read from the memory address.
CELLS	S	a -- a*2	--	Returns the number of bytes needed for a cells (a*2).
CHARS	S	a -- a	--	Returns a. Included for compatibility and code readability.
CMOVE	S	src_addr dest_addr count --	--	Copies count bytes from src_addr to dest_addr.
CMOVE>	S	src_addr dest_addr count --	--	Copies count bytes from src_addr to dest_addr.
COPYW	S	src_addr dest_addr count --	--	Copies count cells (16-bits) from src_addr to dest_addr.
FILL	S	address count value --	--	Fills count bytes of memory with value, starting at address.
HFREE	S	-- n	--	Returns available memory (in bytes) in high memory.
LFREE	S	-- n	--	Returns available memory (in bytes) in low memory.
MEM	S	--	--	Reports the number of free bytes in low memory, number of free bytes in high memory, and total number of free bytes respectively to the screen.
V!	S	value address --	--	Stores 8 bit value value to VDP address address.
V@	S	address -- value	--	Fetches value from VDP address address. Places the 8-bit value read from VDP memory on the stack as a 16-bit right justified cell.
V2!	S	value vdpAddress --	--	Writes the 16-bit value value to vdpAddress.
V2@	S	vdpAddress -- n	--	Reads the 16-bit value from address vdpAddress and pushes it to the stack as a single 16-bit cell.
VMBR	S	vdp_address cpu_address count --	--	VDP Multiple Byte Read. Copies count bytes starting at vdp_address to CPU memory starting at cpu_address.
VMBW	S	vdp_address cpu_address count --	--	VDP Multiple Byte Write. Copies count bytes starting at CPU address cpu_address to vdp memory starting at vdp_address.