Nibasc and #$0F Nibble in a to Ascii in a

0489	8308	60				RTS
0490	8309	29	0F		NIBASC AND #$0F			;NIBBLE IN A TO ASCII IN A
0491	830B	C9	0A			CMP #$0A		;LINE FEED
0492	830D	B0	04			BCS	NIBALF
0493	830F	69	30			ADC	#$30
0494	8311	90	02			BCC	EXITNB
0495	8313	69	36		NIBALF ADC		#$36
0496	8315	60			EXITNB RTS
0497	8316	20	4D	83	CRLFSZ JSR CRLF			;PRINT CRLF, FF, FE
0498	8319	A6	FF			LDX	$FF
0499	831B	A5	FE			LDA	$FE
0500	831D	4C	F4	82		JMP	OUTXAH
0501	8320	A9	3F		OUTQM	LDA	#'?'
0502	8322	4C	47	8A		JMP	OUTCHR
0503	8325	20	3A	83	OCMCK	JSR	COMMA	;OUT COMMA, CKSUM LO
0504	8328	AD 36 A6				LDA	SCR6
0505	832B	4C	FA 82			JMP	OUTBYT
0506	832E	A9	00		ZERCK	LDA	#0	;INIT CHECKSUM
0507	8330	8D	36	A6		STA	SCR6
0508	8333	8D	37	A6		STA	SCR7
0509	8336	60				RTS
0510	8337	20	EE 82		OPCCOM JSR OUTPC			;PC OUT, COMMA OUT
0511	833A	48			COMMA	PHA		;COMMA OUT
0512	833B	A9	2C			LDA	#','
0513	833D	D0	06			BNE	SPCP3
0514	833F	20	42	83	SPC2	JSR	SPACE	;2 SPACES OUT
0515	8342	48			SPACE	PHA		;1 SPACE OUT
0516	8343	A9	20			LDA	#$20	;SPACE
0517	8345	20	47	8A	SPCP3	JSR	OUTCHR
0518	8348	68				PLA
0519	8349	60				RTS
0520	834A	20	FA 82		OBCRLF JSR OUTBYT			;BYTE OUT, CRLF OUT
0521	834D	48			CRLF	PHA
0522	834E	A9	0D			LDA	#$0D
0523	8350	20	47	8A		JSR	OUTCHR
0524	8353	A9	0A			LDA	#$0A	;LINE FEED
0525	8355	20	47	8A		JSR	OUTCHR
0526	8358	68				PLA
0527	8359	60				RTS
0528	835A	AE 56 A6			DELAY	LDX	TV	;DELAY DEPENDS ON TV
0529	835D	20	88	81	DL1	JSR	SAVER
0530	8360	A9	FF			LDA	#$FF
0531	8362	8D	39	A6		STA	SCR9
0532	8365	8D	38	A6		STA	SCR8
0533	8368	0E	38	A6	DLY1	ASL	SCR8	;(SCR9,8)=FFFF-2**X
0534	836B	2E	39	A6		ROL	SCR9
0535	836E	CA				DEX
0536	836F	D0	F7			BNE	DLY1
0537	8371	20	03	89	DLY2	JSR	IJSCNV	;SCAN DISPLAY
0538	8374	20	86	83		JSR	INSTAT	;SEE IF KEY DOWN
0539	8377	B0	0A			BCS	DLY0
0540	8379	EE 38 A6				INC	SCR8	;SCAN 2**X+1 TIMES
0541	837C	D0	03			BNE	*+5
0542	837E	EE 39 A6				INC	SCR9
0543	8381	D0	EE			BNE	DLY2
0544	8383	4C	BE 81		DLY0	JMP	RESXF
0545	8386				; INSTAT -		SEE IF KEY DOWN, RESULT IN CARRY
0546	8386				; KEYSTAT,		TSTAT RETURN IMMEDIATELY W/STATUS
0547	8386				; INSTAT WAITS FOR RELEASE
0548	8386	20	92	83	INSTAT JSR		INJISV
0549	8389	90	06			BCC	INST2
0550	838B	20	92	83	INST1	JSR	INJISV

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.

NIBASC AND #$0F

;NIBBLE IN A TO ASCII IN A

ADC

II specifications