LSR Prepare Carry for BC, BNC

F6C5: 4A	57		LSR		;PREPARE CARRY FOR BC, BNC.
F6C6: 60	58		RTS		;GOTO NON-REG OP ROUTINE
F6C7: 68	59	RTNZ	PLA		;POP RETURN ADDRESS
F6C8: 68	60		PLA
F6C9: 20 3F FF	61		JSR	RESTORE	;RESTORE 6502 REG CONTENTS
F6CC: 6C 1E 00	62		JMP	(R15L)	;RETURN TO 6502 CODE VIA PC
F6CF: B1 1E	63	SETZ	LDA	(R15L),Y	;HIGH-ORDER BYTE OF CONSTANT
F6D1: 95 01	64		STA	R0H,X
F6D3: 88	65		DEY
F6D4: B1 1E	66		LDA	(R15L),Y	;LOW-ORDER BYTE OF CONSTANT
F6D6: 95 00	67		STA	R0L,X
F6D8: 98	68		TYA		;Y-REG CONTAINS 1
F6D9: 38	69		SEC
F6DA: 65 1E	70		ADC	R15L	;ADD 2 TO PC
F6DC: 85 1E	71		STA	R15L
F6DE: 90 02	72		BCC	SET2
F6E0: E6 1F	73		INC	R15H
F6E2: 60	74	SET2	RTS
F6E3: 02	75	OPTBL	DFB	SET-1	;1X
F6E4: F9	76	BRTBL	DFB	RTN-1	;0
F6E5: 04	77		DFB	LD-1	;2X
F6E6: 9D	78		DFB	BR-1	;1
F6E7: 0D	79		DFB	ST-1	;3X
F6E8: 9E	80		DFB	BNC-1	;2
F6E9: 25	81		DFB	LDAT-1	;4X
F6EA: AF	82		DFB	BC-1	;3
F6EB: 16	83		DFB	STAT-1	;5X
F6EC: B2	84		DFB	BP-1	;4
F6ED: 47	85		DFB	LDDAT-1	;6X
F6EE: B9	86		DFB	BM-1	;5
F6EF: 51	87		DFB	STDAT-1	;7X
F6F0: C0	88		DFB	BZ-1	;6
F6F1: 2F	89		DFB	POP-1	;8X
F6F2: C9	90		DFB	BNZ-1	;7
F6F3: 5B	91		DFB	STPAT-1	;9X
F6F4: D2	92		DFB	BM1-1	;8
F6F5: 85	93		DFB	ADD-1	;AX
F6F6: DD	94		DFB	BNM1-1	;9
F6F7: 6E	95		DFB	SUB-1	;BX
F6F8: 05	96		DFB	BK-1	;A
F6F9: 33	97		DFB	POPD-1	;CX
F6FA: E8	98		DFB	RS-1	;B
F6FB: 70	99		DFB	CPR-1	;DX
F6FC: 93	100		DFB	BS-1	;C
F6FD: 1E	101		DFB	INR-1	;EX
F6FE: E7	102		DFB	NUL-1	;D
F6FF: 65	103		DFB	DCR-1	;FX
F700: E7	104		DFB	NUL-1	;E
F701: E7	105		DFB	NUL-1	;UNUSED
F702: E7	106		DFB	NUL-1	;F
F703: 10 CA	107	SET	BPL	SETZ	;ALWAYS TAKEN
F705: B5 00	108	LD	LDA	R0L,X
	109	BK	EQU	*-1
F707: 85 00	110		STA	R0L
F709: B5 01	111		LDA	R0H,X	;MOVE RX TO R0
F70B: 85 01	112		STA	R0H
F70D: 60	113		RTS
F70E: A5 00	114	ST	LDA	R0L
F710: 95 00	115		STA	R0L,X	;MOVE R0 TO RX
F712: A5 01	116		LDA	R0H
F714: 95 01	117		STA	R0H,X
F716: 60	118		RTS

II specifications

The Apple II, launched in April 1977, was one of the first highly successful mass-produced microcomputer products. It marked a significant leap in personal computing, setting standards for future developments in the industry. Created by Steve Wozniak and Steve Jobs, the Apple II differentiated itself with its user-friendly design, appealing aesthetics, and robust capabilities.

One of the standout features of the Apple II was its open architecture, which allowed users to expand and enhance the computer's functionality. This design enabled hundreds of third-party hardware and software developers to contribute to its ecosystem, resulting in an array of peripherals, including printers, modems, and storage devices. The Apple II utilized a MOS Technology 6502 microprocessor running at a clock speed of 1 MHz. Initially equipped with 4 KB of RAM, the machine could be expanded to 48 KB, accommodating more complex applications and programs.

The Apple II was also notable for its colorful graphics. It was one of the first computers to support color display, offering a 6-color palette with a resolution of 280x192 pixels in 16 colors when using its Color Graphics Card. This feature significantly enhanced the visual appeal of games and educational software developed for the platform, making computing more accessible and entertaining for various audiences.

Apple's commitment to user experience was evident in the design of the machine. It featured an integrated keyboard and a plastic case, which was both durable and visually appealing. The self-contained design included drive bays for floppy disk drives, allowing for quicker data access than traditional tape drives. It also supported audio output, enabling sound effects and music, a novelty at the time.

The introduction of the Apple DOS operating system further underscored the machine's capabilities. DOS streamlined file management and made it easier for users to navigate and manage their data. The combination of hardware and software positioned the Apple II as an educational tool and a gaming platform, fostering a vibrant software ecosystem.

The Apple II family continued to evolve, with variations like the Apple II+, IIe, and IIgs being introduced over the years. These iterations brought enhancements in memory, processing power, and graphics capabilities. The legacy of the Apple II endures, not only as a foundational product in personal computing but also as a symbol of innovation that paved the way for future advancements in technology. Its impact is still felt today, as it inspired countless developers and shaped the trajectory of the computer industry.

Apple II manual LSR Prepare Carry for BC, BNC

Models: II

LSR

;PREPARE CARRY FOR BC, BNC.

II specifications