The Way Of The Exploding Fist: Routine at 92FF

92FF: Expand Time Byte To ASCII


Time_Counter	92FF	DEFB $F0,$D8	Guessing at the length.
	9301	DEFB $18,$FC
	9303	DEFB $9C,$FF
	9305	DEFB $F6,$FF
	9307	DEFB $FF,$FF	Terminator.
On entry HL contains the time as the LSB, e.g. for 30s HL will be 001E.
Process_Time	9309	PUSH HL	Pushes HL, DE and BC onto the stack.
	930A	PUSH DE
	930B	PUSH BC
	930C	LD DE,$92FF	Point to Time_Counter.
Process_Time_Loop	930F	LD A,(DE)	Load the next byte pair from the address pointer into BC.
	9310	LD C,A
	9311	INC DE
	9312	LD A,(DE)
	9313	LD B,A
	9314	INC DE	Increase the address pointer by one and stash it on the stack for later.
	9315	PUSH DE
	9316	LD A,$2F	Store 2F in A.
Count "up" from ASCII "0" until the correct representation is reached.
Process_Time_Char	9318	INC A	Increment A by one (so on the first pass A will now contain ASCII "0").
	9319	LD D,H	Copy the remaining time into DE.
	931A	LD E,L	Copy the remaining time into DE.
	931B	ADD HL,BC	Adds the remaining time to the 16-bit number held in BC.
	931C	JR C,Process_Time_Char	If the carry flag is set loop back to Process_Time_Char.
	931E	EX DE,HL	Swap the DE and HL registers.
	931F	LD (IX+$00),A	Write the processed ASCII number character to the time print buffer.
	9322	INC IX	Increment IX by one to process the next character in the time buffer once looped around.
	9324	POP DE	Restore the byte pair address pointer from the stack.
	9325	INC C	Loop back to Process_Time_Loop until the terminator is reached (FF+01 will set the zero flag).
	9326	JR NZ,Process_Time_Loop
	9328	POP BC	Restores BC, DE and HL from the stack.
	9329	POP DE
	932A	POP HL
	932B	RET	Return.