ChronosMM: Routine at 58735

58735: COPY_BUFFER_TO_SCREEN

Used by the routine PLAY_GAME.
COPY_BUFFER_TO_SCREEN	58735	LD (59787),SP	Store SP to SP_STORAGE_2
	58739	LD SP,59789
	58742	LD HL,60391	Point HL at the screen buffer, two columns in
	58745	LD A,121
COPY_BUFFER_TO_SCREEN_0	58747	POP DE
	58748	LDI	LDI x28 - the visible screen is 28 columns wide. DE is pointing at 16386 (the address of the top of the second column)
	58750	LDI
	58752	LDI
	58754	LDI
	58756	LDI
	58758	LDI
	58760	LDI
	58762	LDI
	58764	LDI
	58766	LDI
	58768	LDI
	58770	LDI
	58772	LDI
	58774	LDI
	58776	LDI
	58778	LDI
	58780	LDI
	58782	LDI
	58784	LDI
	58786	LDI
	58788	LDI
	58790	LDI
	58792	LDI
	58794	LDI
	58796	LDI
	58798	LDI
	58800	LDI
	58802	LDI
	58804	LD BC,4
	58807	ADD HL,BC	Add 4 to HL to skip the 2 undisplayed columns either side of the play area
	58808	DEC A
	58809	JP NZ,COPY_BUFFER_TO_SCREEN_0	Loop 120 times (15 character rows, top two thirds of screen)
	58812	POP DE
	58813	LD SP,(59787)	Restore SP from SP_STORAGE_2
	58817	LD B,H
	58818	LD C,L
	58819	LD HL,50922	Point HL at L50922
	58822	LD A,(59667)
	58825	AND A
	58826	JR Z,COPY_BUFFER_TO_SCREEN_1
	58828	LD HL,51314	Point HL at L51314
COPY_BUFFER_TO_SCREEN_1	58831	LD A,7
COPY_BUFFER_TO_SCREEN_2	58833	PUSH AF
	58834	LD A,28
	58836	PUSH DE
COPY_BUFFER_TO_SCREEN_3	58837	PUSH AF
	58838	LD A,(BC)
	58839	INC BC
	58840	AND (HL)
	58841	INC HL
	58842	OR (HL)
	58843	INC HL
	58844	LD (DE),A
	58845	INC DE
	58846	POP AF
	58847	DEC A
	58848	JP NZ,COPY_BUFFER_TO_SCREEN_3
	58851	POP DE
	58852	INC D
	58853	INC BC
	58854	INC BC
	58855	INC BC
	58856	INC BC
	58857	POP AF
	58858	DEC A
	58859	JP NZ,COPY_BUFFER_TO_SCREEN_2
	58862	RET