E1AC Have Valid Command | Apple II specs

0487	E1AC				;HAVE VALID COMMAND
0488	E1AC 8A				MCM3	TXA		;CONVERT TO WORD (MULT BY 2)
0489	E1AD 0A					ASL A		;2 BYTES (ADDR)
0490	E1AE AA					TAX
0491	E1AF BD E5 E1					LDA MONCOM,X		;GET ADDRESS OF COMMAND PROCESSOR
0492	E1B2 8D 7D A4					STA	JUMP
0493	E1B5 BD E6 E1					LDA	MONCOM+1,X
0494	E1B8 8D 7E A4					STA	JUMP+1
0495	E1BB 20 C1 E1					JSR	JMPR	;CMD PROCESSORS CAN EXIT WITH 'RTS'
0496	E1BE 4C 82 E1					JMP	START
0497	E1C1 6C 7D A4				JMPR	JMP (JUMP)		;GO TO COMMAND
0498	E1C4
0499	E1C4				;VALID COMMANDS
0500	E1C4				MCNT	=32		;COUNT
0501	E1C4 4554524D472FCOMB					.DB	"ETRMG/LDN*AXYPS "
0501	E1CA 4C444E2A415859505320
0502	E1D4 423F2348565A					.DB	"B?#HVZIK123456[]",$5E
0502	E1DA 494B3132333435365B5D5E
0503	E1E5
0504	E1E5 39F6CFF627E2MONCOM .DW						EDIT,REENTR,REG,MEM,GO
0504	E1EB 48E261E2
0505	E1EF A0E2E6E23BE4					.DW	CHNGG,LOAD,DUMP,ASSEM,CGPC,CGA
0505	E1F5 00D0D4E5EEE5
0506	E1FB F2E5F6E5EAE5					.DW	CGX,CGY,CGPS,CGS,NXT5,BRKA
0506	E201	FAE50DE61BE6
0507	E207	4DE6FEE665E6				.DW	SHOW,CLRBK,SHIS,REGT,TRACE
0507	E20D D9E6DDE6
0508	E211	9EFB0AE7BDE6				.DW	MNEENT,KDISA,TOGTA1,TOGTA2,VECKSM
0508	E217	CBE694E6
0509	E21B E5E600B003B0					.DW	BRKK,BASIEN,BASIRE
0510	E221				;USER DEFINED FUNCTIONS
0511	E221	0C010F011201				.DW	KEYF1,KEYF2,KEYF3
0512	E227
0513	E227				;*** R COMMAND-DISPLAY REGISTERS ***
0514	E227	20	13	EA	REG	JSR CRLOW		;CLEAR DISP IF KB
0515	E22A A0 08					LDY #M4-M1		;MESSAG & <CR>
0516	E22C 20 AF E7					JSR	KEP
0517	E22F 20 24 EA					JSR	CRCK
0518	E232	20	3E	E8	REG1	JSR	BLANK
0519	E235	A0	09			LDY	#SAVPC-ADDR ;OUTPUT PGR CNTR (SAVEPC+1,SAVEPC)
0520	E237	20	DD E2			JSR	WRITAD
0521	E23A A9 20					LDA	#SAVPS	;NOW THE OTHER 5 REGS
0522	E23C 8D 1C A4					STA	ADDR
0523	E23F A9 A4					LDA	#SAVPS/256
0524	E241	8D	1D	A4		STA	ADDR+1
0525	E244	A2	05			LDX	#5	;COUNT
0526	E246	D0	07			BNE MEM1		;SHARE CODE
0527	E248
0528	E248				;*** M COMMAND-DISPLAY MEMORY ***
0529	E248	20	AE EA		MEM	JSR ADDIN		;GET START ADDDRESS IN ADDR
0530	E24B B0 13					BCS	MEM3
0531	E24D A2 04				MEIN	LDX	#4
0532	E24F A0 00				MEM1	LDY	#0
0533	E251	20	3E	E8	MEM2	JSR	BLANK
0534	E254	A9	1C			LDA	#ADDR
0535	E256	20	58	EB		JSR	LDAY	;LOAD CONTENTS OF CURR LOCATION
0536	E259	20	46	EA		JSR NUMA		;AND DISPLAY IT AS 2 HEX DIGITS
0537	E25C C8					INY
0538	E25D CA					DEX		;DECR COUNTER
0539	E25E D0 F1					BNE	MEM2
0540	E260	60			MEM3	RTS		;GET NEXT COMMAND
0541	E261

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 E1AC Have Valid Command

Models: II

E1AC

;HAVE VALID COMMAND

TXA

TAX

"ETRMG/LDN*AXYPS "

II specifications