MATCH1 JMP, Curead TXA | Apple II instruction

3973	FE33 A2 05		LDX	#05	;SET UP INNER LOOP
3974	FE35 4A	INLUP	LSR	A	;SHIFT 5 BITS ACC TO MOVAD,MOVAD+1
3975	FE36 6E 26 01		ROR	MOVAD
3976	FE39 6E 27 01		ROR	MOVAD+1
3977	FE3C CA		DEX
3978	FE3D D0 F6		BNE	INLUP
3979	FE3F 88		DEY
3980	FE40 D0 EE		BNE	OUTLUP
3981	FE42
3982	FE42	;SEARCH FOR MATCHING COMPRESSED CODE
3983	FE42 A2 40		LDX	#$40
3984	FE44 AD 26 01	SRCHLP LDA		MOVAD
3985	FE47 DD B8 F5	SRCHM	CMP	MNEML-1,X	;MATCH LEFT HALF
3986	FE4A F0 05		BEQ	MATCH
3987	FE4C CA		DEX
3988	FE4D D0 F8		BNE SRCHM		;IF NO - TRY AGAIN
3989	FE4F F0 0B		BEQ	MATCH1
3990	FE51 AD 27 01	MATCH	LDA	MOVAD+1	;ALSO MATCH RIGHT HALF
3991	FE54 DD F8 F5		CMP	MNEMR-1,X
3992	FE57 F0 06		BEQ	GOTIT
3993	FE59 CA		DEX
3994	FE5A D0 E8		BNE	SRCHLP
3995	FE5C 4C C5 FC	MATCH1 JMP		ERRORM
3996	FE5F
3997	FE5F	;GET INSTRUCTION TYPE FROM TYPE TABLE
3998	FE5F BD 5D FB	GOTIT	LDA	TYPTB-1,X
3999	FE62 8D 2E 01		STA	TYPE
4000	FE65
4001	FE65	;GET OPCODE FROM OP CODE UE
4002	FE65 BD 1D FB		LDA	STCODE-1,X
4003	FE68 8D 34 A4		STA	OPCODE
4004	FE6B 4C C1 FB		JMP	MODEM
4005	FE6E
4006	FE6E	;THIS SECTION SETS THE CURRENT ADDRESS POINTER
4007	FE6E A9 2A	STLO	LDA	#'*'
4008	FE70 20 7A E9		JSR	OUTPUT
4009	FE73 20 AE EA	STLOAD JSR		ADDIN	;GET ADDR
4010	FE76 B0 F6		BCS	STLO	;IN CASE OF ERROR
4011	FE78 4C 24 FF		JMP PATC16		;ADDR TO PC THEN TO STARTM
4012	FE7B
4013	FE7B	;PATCHES TO CORRECT PROBLEMS WITHOUT
4014	FE7B	;CHANGING ENTRY POINTS TO THE ROUTINES
4015	FE7B 41		.DB	"A"
4016	FE7C 38	PATCH1 SEC			;ADJUST BAUD
4017	FE7D E9 2C		SBC	#44
4018	FE7F 8D 18 A4		STA	CNTL30
4019	FE82 60		RTS
4020	FE83
4021	FE83 8A	CUREAD TXA			;SAVE X , OUTPUT CUR
4022	FE84 48		PHA
4023	FE85 AE 15 A4		LDX	CURPO2
4024	FE88 E0 14		CPX	#20	;ONLY IF < 20
4025	FE8A B0 05		BCS	PAT2A
4026	FE8C A9 DE		LDA	#$DE
4027	FE8E 20 7B EF		JSR	OUTDD1
4028	FE91 68	PAT2A	PLA
4029	FE92 AA		TAX
4030	FE93 4C 3C E9		JMP READ		;CONTINUE
4031	FE96
4032	FE96 20 3C E9	RED1	JSR READ		;READ & ECHO WITHOUT CURSOR
4033	FE99 4C 76 E9		JMP	RED2
4034	FE9C

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 MATCH1 JMP, Curead TXA

Models: II

CMP

CMP

MATCH1 JMP

CUREAD TXA

TAX

II specifications