; patch #1 for M100/T102 rom
; this patch primarily accomplished 2 things
; 1) it reduced the amount of space needed in the LCD patterns table, enabling room for changes
; 2) it lays the underlying foundation for the hardware scrolling patch
; blocks:

;		6C39
;		7467 - 746E
;		74BB - 74EA
;		7551 - 75AF





;--------------------------------------------------------------------------------------
;PATCH1
; this entry corrects the data in "Hayash"
.org	06C39H
p1:	db	00H



;--------------------------------------------------------------------------------------

;PATCH2
; Proposed replacement code 7467 to 746E

.org	07467H
p2:	LXI H,0F9AAH
	CALL p5
	NOP
	NOP




;--------------------------------------------------------------------------------------
;PATCH3
; Proposed replacement code 74BB to 74EA


.org	074BBH

p3:	RLC
	MOV C,A
	MVI B,00H
	LXI H,7551H
	DAD B
	MOV C,M
	INX H
	MOV A,M
	PUSH PSW
	LDA 0FFF4H
	RAR
	RAR
	RAR
	LXI H,0F9AAH
	CALL p5
	CALL 753BH
	SHLD 0FFF6H
	POP PSW
	ORA B
	MOV B,A
	POP H
	DCR D
	CALL 74F7H
	INR D
	MVI A,06H
	SUB E
	RZ
	MOV E,A
	PUSH H
	LHLD 0FFF6H





;--------------------------------------------------------------------------------------
;PATCH4
; this is the corrected LCD table  7551 to 75A0
; 75A1 to 7640 is free to use, 160 bytes total

.org	07551H
p4:	db	00H,00H,00H,06H,00H,0CH,00H,12H,00H,18H,00H,1EH,00H,24H,00H,2AH
	db	00H,30H
	db	02H,04H,02H,0AH,02H,10H,02H,16H,02H,1CH,02H,22H,02H,28H,02H,2EH
	db	04H,02H,04H,08H,04H,0EH,04H,14H,04H,1AH,04H,20H,04H,26H,04H,2CH
	db	06H,00H,06H,06H,06H,0CH,06H,12H,06H,18H,06H,1EH,06H,24H,06H,2AH
	db	06H,30H
	db	08H,04H,08H,0AH,08H,10H,08H,16H,08H,1CH,08H,22H




;--------------------------------------------------------------------------------------
;PATCH5
; Proposed subroutine at 75A1H to ??

.org	075A1H

p5:	MOV B,M
	LXI H,7643H
	JNC ahead1
	MVI L,4DH
ahead1:	ADD B
	MVI B,00H
	DAD B
	MOV B,A
	RET