LT2 LDA A2L,X Copy A2 2 Bytes to

FE20: A2 01	891	LT	LDX	#$01
FE22: B5 3E	892	LT2	LDA	A2L,X	;COPY A2 (2 BYTES) TO
FE24: 95 42	893		STA	A4L,X	;	A4 AND A5
FE26: 95 44	894		STA	A5L,X
FE28: CA	895		DEX
FE29: 10 F7	896		BPL	LT2
FE2B: 60	897		RTS
FE2C: B1 3C	898	MOVE	LDA	(A1L),Y	;MOVE (A1 TO A2) TO
FE2E: 91 42	899		STA	(A4L),Y	;	(A4)
FE30: 20 B4 FC	900		JSR	NXTA4
FE33: 90 F7	901		BCC	MOVE
FE35: 60	902		RTS
FE36: B1 3C	903	VFY	LDA	(A1L),Y	;VERIFY (A1 TO A2) WITH
FE38: D1 42	904		CMP	(A4L),Y	;	(A4)
FE3A: F0 1C	905		BEQ	VFYOK
FE3C: 20 92 FD	906		JSR	PRA1
FE3F: B1 3C	907		LDA	(A1L),Y
FE41: 20 DA FD	908		JSR	PRBYTE
FE44: A9 A0	909		LDA	#$A0
FE46: 20 ED FD	910		JSR	COUT
FE49: A9 A8	911		LDA	#$A8
FE4B: 20 ED FD	912		JSR	COUT
FE4E: B1 42	913		LDA	(A4L),Y
FE50: 20 DA FD	914		JSR	PRBYTE
FE53: A9 A9	915		LDA	#$A9
FE55: 20 ED FD	916		JSR	COUT
FE58: 20 B4 FC	917	VFYOK	JSR	NXTA4
FE5B: 90 D9	918		BCC	VFY
FE5D: 60	919		RTS
FE5E: 20 75 FE	920	LIST	JSR	A1PC	;MOVE A1 (2 BYTES) TO
FE61: A9 14	921		LDA	#$14	;	PC IF SPEC'D AND
FE63: 48	922	LIST2	PHA		;	DISEMBLE 20 INSTRS
FE64: 20 D0 F8	923		JSR	INSTDSP
FE67: 20 53 F9	924		JSR	PCADJ	;ADJUST PC EACH INSTR
FE6A: 85 3A	925		STA	PCL
FE6C: 84 3B	926		STY	PCH
FE6E: 68	927		PLA
FE6F: 38	928		SEC
FE70: E9 01	929		SBC	#$01	;NEXT OF 20 INSTRS
FE72: D0 EF	930		BNE	LIST2
FE74: 60	931		RTS
FE75: 8A	932	A1PC	TXA		;IF USER SPEC'D ADR
FE76: F0 07	933		BEQ	A1PCRTS	;	COPY FROM A1 TO PC
FE78: B5 3C	934	A1PCLP	LDA	A1L,X
FE7A: 95 3A	935		STA	PCL,X
FE7C: CA	936		DEX
FE7D: 10 F9	937		BPL	A1PCLP
FE7F: 60	938	A1PCRTS	RTS
FE80: A0 3F	939	SETINV	LDY	#$3F	;SET FOR INVERSE VID
FE82: D0 02	940		BNE	SETIFLG	; VIA COUT1
FE84: A0 FF	941	SETNORM	LDY	#$FF	;SET FOR NORMAL VID
FE86: 84 32	942	SETIFLG	STY	INVFLG
FE88: 60	943		RTS
FE89: A9 00	944	SETKBD	LDA	#$00	;SIMULATE PORT #0 INPUT
FE8B: 85 3E	945	INPORT	STA	A2L	;	SPECIFIED (KEYIN ROUTINE)
FE8D: A2 38	946	INPRT	LDX	#KSWL
FE8F: A0 1B	947		LDY	#KEYIN
FE91: D0 08	948		BNE	IOPRT
FE93: A9 00	949	SETVID	LDA	#$00	;SIMULATE PORT #0 OUTPUT
FE95: 85 3E	950	OUTPORT	STA	A2L	;	SPECIFIED (COUT1 ROUTINE)
FE97: A2 36	951	OUTPRT	LDX	#CSWL
FE99: A0 F0	952		LDY	#COUT1

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 LT2 LDA A2L,X Copy A2 2 Bytes to

Models: II

LT2

LDA

A2L,X

;COPY A2 (2 BYTES) TO

II specifications