PRADR2 LDA, Pla, PRADR4 DEX

2908	F4CC 8D 17 01					STA	LMNEM
2909	F4CF B9 F9 F5					LDA	MNEMR,Y
2910	F4D2 8D 18 01					STA	RMNEM
2911	F4D5 A2 03					LDX	#3	;MUST BE
2912	F4D7 A9 00				PRMN1	LDA	#0
2913	F4D9 A0 05					LDY	#5
2914	F4DB 0E 18 01				PRMN2	ASL	RMNEM
2915	F4DE 2E 17 01					ROL	LMNEM
2916	F4E1 2A					ROL	A
2917	F4E2 88					DEY
2918	F4E3 D0 F6					BNE	PRMN2
2919	F4E5 69 BF					ADC	#'?'+$80	;ADD "?" OFFSET
2920	F4E7 20 BC E9					JSR	OUTALL
2921	F4EA CA					DEX
2922	F4EB D0 EA					BNE	PRMN1
2923	F4ED 20 45 F5					JSR	PRBL2
2924	F4F0 A2 06					LDX	#6
2925	F4F2 A9 00					LDA	#0
2926	F4F4 8D 29 A4					STA	STIY+2	;FLAG
2927	F4F7 E0 03				PRADR1	CPX	#3
2928	F4F9 D0 1E					BNE	PRADR3	;IF X=3 PRINT ADDR VALUE
2929	F4FB A4 EA					LDY	LENGTH
2930	F4FD F0 1A					BEQ	PRADR3	;1 BYTE INSTR
2931	F4FF AD 16 01				PRADR2 LDA		FORMA
2932	F502	C9	E8			CMP	#$E8	;RELATIVE ADDRESSING
2933	F504	20	56	EB		JSR	PCLLD
2934	F507	B0	27			BCS	RELADR
2935	F509				;SE IF	SYMBOL
2936	F509	48				PHA
2937	F50A AD 29 A4					LDA	STIY+2
2938	F50D D0 03					BNE	MR11A
2939	F50F EE 29 A4					INC STIY+2		;SHOW WE WERE HERE
2940	F512
2941	F512	68			MR11A	PLA
2942	F513	20	46	EA		JSR	NUMA
2943	F516	88				DEY
2944	F517	D0	E6			BNE	PRADR2
2945	F519	0E	16	01	PRADR3 ASL		FORMA
2946	F51C 90 0E					BCC	PRADR4
2947	F51E BD AC F5					LDA	CHAR1-1,X
2948	F521	20	BC E9			JSR	OUTALL
2949	F524	BD B2 F5				LDA	CHAR2-1,X
2950	F527	F0	03			BEQ	PRADR4
2951	F529	20	BC E9			JSR	OUTALL
2952	F52C CA				PRADR4 DEX
2953	F52D D0 C8					BNE	PRADR1
2954	F52F 60					RTS
2955	F530	20	4D	F5	RELADR JSR		PCADJ3
2956	F533	AA				TAX
2957	F534	E8				INX
2958	F535	D0	01			BNE	PRNTXY
2959	F537	C8				INY
2960	F538	98			PRNTXY TYA
2961	F539	4C	42	EA		JMP WRAX		;PRINT A &X
2962	F53C AD 26 A4				PRPC	LDA	SAVPC+1	;PRINT PC
2963	F53F AE 25 A4					LDX	SAVPC
2964	F542	20	42	EA		JSR	WRAX
2965	F545	A9	20		PRBL2	LDA	#' '
2966	F547	4C	BC E9			JMP	OUTALL
2967	F54A A5 EA					LDA	LENGTH
2968	F54C 38					SEC
2969	F54D AC 26 A4				PCADJ3 LDY		SAVPC+1	;PRG CNTR HIGH

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 PRADR2 LDA, Pla, PRADR4 DEX

Models: II

STA

STA

ROL

ROL

BNE

BNE

STA

CPX

BNE

BEQ

PRADR2 LDA

BNE

PLA

BNE

BCC

BEQ

PRADR4 DEX

BNE

BNE

JMP

II specifications