E1PARM JMP

0799	859D	8D	4C	A6		STA	P2L
0800	85A0	18				CLC
0801	85A1	69	07			ADC	#$07
0802	85A3	8D	4A	A6		STA	P3L
0803	85A6	AD 4B A6				LDA	P3H
0804	85A9	8D	4D	A6		STA	P2H
0805	85AC 69 00					ADC	#0
0806	85AE 8D 4B A6					STA	P3H
0807	85B1	4C	40	86		JMP	VER2+4
0808	85B4	C9	4A		JUMP1	CMP	#'J'	;JUMP (JUMP TABLE IN SYS RAM)
0809	85B6	D0	1F			BNE	L11B
0810	85B8	AD 4A A6				LDA	P3L
0811	85BB C9 08					CMP	#8	;0-7 ONLY VALID
0812	85BD B0 26					BCS	JUM2
0813	85BF 20 9C 8B					JSR	NACCES	;WRITE PROT SYS RAM
0814	85C2	0A				ASL	A
0815	85C3	A8				TAY
0816	85C4	A2	FF			LDX #$FF		;INIT STK PTR
0817	85C6	9A				TXS
0818	85C7	A9	7F			LDA #$7F		;PUSH COLD RETURN
0819	85C9	48				PHA
0820	85CA A9 FF					LDA	#$FF
0821	85CC 48					PHA
0822	85CD B9 21 A6					LDA JTABLE+1,Y		;GET ADDR FROM TABLE
0823	85D0	48				PHA		;PUSH ON STACK
0824	85D1	B9	20	A6		LDA	JTABLE,Y
0825	85D4	4C	08	84		JMP	NR10	;LOAD UP USER REG'S AND RTI
0826	85D7	C9	12		L11B	CMP	#$12	;LOAD KIM FMT, 1 PARM
0827	85D9	D0	14			BNE	L21B
0828	85DB A0 00					LDY	#0	;MODE = KIM
0829	85DD AD 4A A6				L11C	LDA	P3L
0830	85E0	C9	FF			CMP	#$FF	;ID MUST NOT BE FF
0831	85E2	D0	02			BNE	*+4
0832	85E4	38				SEC
0833	85E5	60			JUM2	RTS
0834	85E6	20	08	82		JSR PSHOVE		;FIX PARM POSITION
0835	85E9	20	08	82	L11D	JSR	PSHOVE
0836	85EC 4C 78 8C					JMP	LENTRY
0837	85EF C9 13				L21B	CMP	#$13	;LOAD TAPE, HS FMT, 1 PARM
0838	85F1	D0	04			BNE	WPR1B
0839	85F3	A0	80			LDY	#$80	;MODE = HS
0840	85F5	D0	E6			BNE	L11C
0841	85F7	C9	57		WPR1B	CMP	#'W'	;WRITE PROT USER RAM
0842	85F9	D0	1B			BNE	E1PARM
0843	85FB AD 4A A6					LDA	P3L	; FIRST DIG IS 1K ABOVE 0,
0844	85FE 29 11					AND	#$11	; SECOND IS 2K ABOVE 0
0845	8600	C9	08			CMP	#8	; THIRD IS 3K ABOVE 0.
0846	8602	2A				ROL	A
0847	8603	4E	4B	A6		LSR	P3H
0848	8606	2A				ROL	A
0849	8607	0A				ASL	A
0850	8608	29	0F			AND	#$0F
0851	860A	49	0F			EOR	#$0F	;0 IS PROTECT
0852	860C	8D	01	AC		STA	OR3A
0853	860F	A9	0F			LDA	#$0F
0854	8611	8D	03	AC		STA	DDR3A
0855	8614	18				CLC
0856	8615	60				RTS
0857	8616	4C	27	88	E1PARM JMP		CALC3
0858	8619				B2PARM =*
0859	8619				;
0860	8619				; 2 PARAMETER EXEC BLOCKS

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.

ADC

ADC

CMP

CMP

CMP

CMP

CMP

CMP

CMP

EOR

II specifications