The Sidney Affair: Routine at 64646

64646: Print String

Prints the BASIC string "s$" at the current print position in a 64-column font. It finds the string with the ROM routine LOOK-VARS, using the name at PrintString_VariableName, and stops with an error if it is missing. Codes below 32 go straight to RST 16; codes from 144 upwards are skipped. Called by BASIC as "prn" (64646).
PrintString	64646	DI	Disable interrupts.
	64647	LD (65398),SP
	64651	LD SP,65470
	64654	XOR A
	64655	LD (64770),A
	64658	LD A,2
	64660	CALL 5633
	64663	LD HL,64643
	64666	CALL MatchString_LookUpVariable
	64669	JR Z,PrintString_3
PrintString_0	64671	LD A,(HL)
	64672	INC HL
	64673	CP 144
	64675	JR NC,PrintString_2
	64677	CP 32
	64679	JR NC,PrintString_1
	64681	RST 16
	64682	JR PrintString_2
PrintString_1	64684	CALL PrintString_Character
PrintString_2	64687	DEC BC
	64688	LD A,B
	64689	OR C
	64690	JR NZ,PrintString_0
PrintString_3	64692	LD A,(64770)
	64695	OR A
	64696	JR Z,PrintString_4
	64698	LD A,32
	64700	CALL PrintString_Character
PrintString_4	64703	LD SP,(65398)
	64707	RET