TOGTA2 LDA

1100	E6C9 D0 2F					BNE BRK4		;IF $10 TAPE CNTRL IS OFF
1101	E6CB
1102	E6CB				;*****	2 COMMAND-TOGGLE TAPE 2 CONTROL *****
1103	E6CB AD 00 A8				TOGTA2 LDA		DRB
1104	E6CE 49 20					EOR	#$20	;INVERT PB5
1105	E6D0 8D 00 A8					STA	DRB
1106	E6D3 29 20					AND	#$20
1107	E6D5 F0 1A					BEQ	BRK3
1108	E6D7 D0 21					BNE	BRK4
1109	E6D9
1110	E6D9				;*****	V COMMAND-TOGGLE REGISTER DISP FLG *****
1111	E6D9				;DISPLAY REGIST BEFORE EXEC
1112	E6D9 A2 0E				REGT	LDX	#REGF
1113	E6DB D0 0A					BNE	TOGL
1114	E6DD
1115	E6DD				;**** Z COMMAND-TOGGLE DIS TRACE FLG ***
1116	E6DD				;DISPL NEXT INSTR BEFORE EXEC
1117	E6DD A2 0F				TRACE	LDX	#DISFLG
1118	E6DF D0 06					BNE	TOGL
1119	E6E1
1120	E6E1				;*****	\ COMMAND-TOGGLE PRINTER FLAG *****
1121	E6E1 A2 11				PRITR	LDX	#PRIFLG
1122	E6E3 D0 02					BNE	TOGL
1123	E6E5
1124	E6E5				;*****	4 COMMAND-TOGGLE SOFT BRK ENABL FLG *****
1125	E6E5 A2 10				BRKK	LDX	#BKFLG
1126	E6E7
1127	E6E7 BD 00 A4				TOGL	LDA MONRAM,X		;LOAD FLAG
1128	E6EA F0 0A					BEQ TOGL1		;FLAG IS OFF ,SO TURN ON
1129	E6EC A9 00					LDA	#0	;FLAG IS ON ,SO TURN OFF
1130	E6EE 9D 00 A4					STA	MONRAM,X
1131	E6F1 A0 24				BRK3	LDY	#M7-M1	;PRINT "OFF"
1132	E6F3 4C AF E7				BRK2	JMP	KEP
1133	E6F6 38				TOGL1	SEC		;TURN FLAG ON BY SETTING NON-ZERO
1134	E6F7 7E 00 A4					ROR	MONRAM,X	;FLAG IS ON MSB
1135	E6FA A0 21				BRK4	LDY	#M6-M1	;PRINT "ON"
1136	E6FC D0 F5					BNE	BRK2
1137	E6FE
1138	E6FE				;*** # COMMAND-CLEAR ALL BREAKS ***
1139	E6FE A9 00				CLRBK	LDA	#0	;STORE ZEROS INTO BRKPT LIST
1140	E700	A2	07			LDX	#7
1141	E702	9D	00	01	RS20	STA	BKS,X
1142	E705	CA				DEX
1143	E706	10	FA			BPL	RS20
1144	E708	30	E7			BMI BRK3		;PRINT "OFF"
1145	E70A
1146	E70A				;*** K COMMAND-DISASSEMBLE MEMORY ***
1147	E70A A9 2A				KDISA	LDA #'*'		;GET START ADDRESS
1148	E70C 20 7A E9					JSR	OUTPUT
1149	E70F 20 AE EA					JSR	ADDIN
1150	E712	B0	F6			BCS	KDISA	;IF ERROR DO IT AGAIN
1151	E714	20	D7	E5		JSR	CGPC0	;GET IT INTO PROG CNTR
1152	E717	20	37	E8		JSR	PSL1	;PRINT "/"
1153	E71A 20 85 E7					JSR	GCNT	;GET COUNT
1154	E71D 20 24 EA					JSR	CRCK
1155	E720	4C	2B	E7		JMP	JD2
1156	E723	20	07	E9	JD1	JSR	RCHEK	;SEE IF HE WANTS TO INTERRUPT
1157	E726	20	90	E7		JSR	DONE
1158	E729	F0	17			BEQ	JD4
1159	E72B 20 6C F4				JD2	JSR	DISASM	;GO TO DISASSEMBLER
1160	E72E AD 25 A4					LDA	SAVPC	;POINT TO NEXT INSTRUC LOCAT
1161	E731	38				SEC		;ONE MORE TO PROG CNTR

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 TOGTA2 LDA

Models: II

EOR

II specifications