Knight Tyme (48k): Routine at 54051

54051: Store all registers on the stack

Used by the routines at 33952 and 53479.
54051	EX (SP),HL	Place HL onto stack in place of top entry (the address of the call to this routine is now in HL)
54052	PUSH DE	Store registers AF, BC & DE...
54053	PUSH BC	...
54054	PUSH AF	...
54055	EX AF,AF'	Store shadow registers too...
54056	EXX	...
54057	PUSH HL	...
54058	PUSH DE	...
54059	PUSH BC	...
54060	PUSH AF	...
54061	EX AF,AF'	...
54062	EXX	...
54063	PUSH IX	Store IX
54065	PUSH IY	Store IY
54067	PUSH HL	Store HL (address of call to this routine)
54068	PUSH AF	Store AF
54069	LD HL,23	Restore original value of HL (as switched with top of stack at beginning of this routine)...
54072	ADD HL,SP	...
54073	LD A,(HL)	...
54074	DEC HL	...
54075	LD L,(HL)	...
54076	LD H,A	...
54077	POP AF	Restore AF
54078	RET	Return