Notes	Address		Name	Description
	Hex	Dec
N2	5C68	23656	MEM	Address of area used for calculator's memory (usually MEMBOT, but not always)
1	5C6A	23658	FLAGS2	More flags. (Bit 3 set when CAPS SHIFT or CAPS LOCK is on)
X1	5C6B	23659	DF_SZ	The number of lines (including one blank line) in the lower part of the screen
N2	5C6C	23660		Reserved for system use
2	5C6E	23662	OLDPPC	Line number to which CONTINUE jumps
1	5C70	23664	OSPPC	Number within line of statement to which CONTINUE jumps
N1	5C71	23665	FLAGX	Various flags
N2	5C72	23666	STRLEN	Length of string type destination in assignment
N2	5C74	23668	T_ADDR	Address of next item in syntax table (very unlikely to be useful)
2	5C76	23670	SEED	The seed for RND. This is the variable that is set by RANDOMIZE
3	5C78	23672	FRAMES	3 byte (least significant byte first), frame counter incremented every 20ms
2	5C7B	23675	UDG	Address of first user-defined graphic. You can change this, for instance, to save space by having fewer user-defined characters
1	5C7D	23677	COORDS	X-coordinate of last point plotted
1	5C7E	23678		Y-coordinate of last point plotted
X1	5C7F	23679	GMODE	Graphical layer/mode flags
X1	5C80	23680	PRCC	Full address of next position for LPRINT to print at (in ZX Printer buffer). Legal values 5B00 – 5B1F[^p274-1]
1	5C81	23681	STIMEOUT	Screensaver control
2	5C82	23682	ECHO_E	33-column number and 24 line number (in lower half) of end of input buffer
2	5C84	23684	DF_CC	Address in display file of PRINT position
2	5C86	23686	DF_CCL	Like DF_CC for lower part of screen
X1	5C88	23688	S_POSN	33-column number for PRINT position
X1	5C89	23689		24-line number for PRINT position
X2	5C8A	23690	SPOSNL	Like S_POSN for lower part
1	5C8C	23692	SCR_CT	Counts scrolls – it is always 1 more than the number of scrolls that will be done before stopping with scroll?. If you keep poking this with a number bigger than 1 (say 255), the screen will scroll on and on without asking you
1	5C8D	23693	ATTR_P	Permanent current colours, etc., (as set up by colour statements)
1	5C8E	23694	MASK_P	Used for transparent colours, etc. Any bit that is 1 shows that the corresponding attribute bit is taken not from ATTR_P, but from what is already on the screen
N1	5C8F	23695	ATTR_T	Temporary current colours, etc., (as set up by colour items)
N1	5C90	23696	MASK_T	Like MASK_P, but temporary
1	5C91	23697	P_FLAG	More flags
N30	5C92	23698	MEMBOT	Calculator's memory area – used to store numbers that cannot conveniently be put on the calculator stack
2	5CB0	23728		Not used
2	5CB2	23730	RAMTOP	Address of last byte of NextBASIC system area.
2	5CB4	23732	P_RAMT	Address of last byte of physical RAM.

[^p274-1]: Not used in 128K mode or when certain peripherals are attached