System variables

Address	Length	Description
5C00	8	KSTATE - Used in reading the keyboard
5C08	1	LAST-K - Last key pressed
5C09	1	REPDEL - Time that a key must be held down before it repeats
5C0A	1	REPPER - Delay between successive repeats of a key held down
5C0B	2	DEFADD - Address of arguments of user defined function
5C0D	1	K-DATA - Second byte of colour controls entered from keyboard
5C0E	2	TVDATA - Colour, AT and TAB controls going to television
5C10	38	STRMS - Addresses of channels attached to streams
5C36	2	CHARS - 256 less than address of character set
5C38	1	RASP - Length of warning buzz
5C39	1	PIP - Length of keyboard click
5C3A	1	ERR-NR - One less than the error report code
5C3B	1	FLAGS - Various flags to control the BASIC system
5C3C	1	TV-FLAG - Flags associated with the television
5C3D	2	ERR-SP - Address of item on machine stack to use as error return
5C3F	2	LIST-SP - Return address from automatic listing
5C41	1	MODE - Specifies K, L, C, E or G cursor
5C42	2	NEWPPC - Line to be jumped to
5C44	1	NSPPC - Statement number in line to be jumped to
5C45	2	PPC - Line number of statement being executed
5C47	1	SUBPPC - Number within line of statement being executed
5C48	1	BORDCR - Border colour
5C49	2	E-PPC - Number of current line
5C4B	2	VARS - Address of variables
5C4D	2	DEST - Address of variable in assignment
5C4F	2	CHANS - Address of channel data
5C51	2	CURCHL - Address of information used for input and output
5C53	2	PROG - Address of BASIC program
5C55	2	NXTLIN - Address of next line in program
5C57	2	DATADD - Address of terminator of last DATA item
5C59	2	E-LINE - Address of command being typed in
5C5B	2	K-CUR - Address of cursor
5C5D	2	CH-ADD - Address of the next character to be interpreted
5C5F	2	X-PTR - Address of the character after the '?' marker
5C61	2	WORKSP - Address of temporary work space
5C63	2	STKBOT - Address of bottom of calculator stack
5C65	2	STKEND - Address of start of spare space
5C67	1	BREG - Calculator's B register
5C68	2	MEM - Address of area used for calculator's memory
5C6A	1	FLAGS2 - More flags
5C6B	1	DF-SZ - The number of lines in the lower part of the screen
5C6C	2	S-TOP - The number of the top program line in automatic listings
5C6E	2	OLDPPC - Line number to which CONTINUE jumps
5C70	1	OSPCC - Number within line of statement to which CONTINUE jumps
5C71	1	FLAGX - Various flags
5C72	2	STRLEN - Length of string type destination in assignment
5C74	2	T-ADDR - Address of next item in parameter table
5C76	2	SEED - The seed for RND
5C78	3	FRAMES - Frame counter
5C7B	2	UDG - Address of first user defined graphic
5C7D	2	COORDS - Coordinates of last point plotted
5C7F	1	P-POSN - Column number of printer position
5C80	2	PR-CC - Address of next position for LPRINT to print at
5C82	2	ECHO-E - Column and line number of end of input buffer
5C84	2	DF-CC - Address in display file of PRINT position
5C86	2	DF-CCL - Like DF-CC for lower part of screen
5C88	2	S-POSN - Column and line number for PRINT position
5C8A	2	S-POSNL - Like S-POSN for lower part of screen
5C8C	1	SCR-CT - Scroll counter
5C8D	1	ATTR-P - Permanent current colours
5C8E	1	MASK-P - Used for transparent colours
5C8F	1	ATTR-T - Temporary current colours
5C90	1	MASK-T - Temporary transparent colours
5C91	1	P-FLAG - More flags
5C92	30	MEMBOT - Calculator's memory area
5CB0	2	NMIADD - Non-maskable interrupt address
5CB2	2	RAMTOP - Address of last byte of BASIC system area
5CB4	2	P-RAMT - Address of last byte of physical RAM
5CB6	21	Channel information