ROL Priflg Restore FLG | Apple II manual

1531	E9DE 2E 11 A4		ROL PRIFLG		;RESTORE FLG
1532	E9E1 60		RTS
1533	E9E2	;USER DEFINED
1534	E9E2 C9 55	OUTA3	CMP #'U'		;USER ROUTINE?
1535	E9E4 D0 04		BNE	OUTA4
1536	E9E6 38		SEC		;SET FLG FOR NORMAL OUTPUT
1537	E9E7 6C 0A 01		JMP	(UOUT)	;YES
1538	E9EA	;NOWHERE OR TO TTY ,D/P
1539	E9EA C9 58	OUTA4	CMP #'X'		;EAT IT?
1540	E9EC D0 8D		BNE OUT1		;OUTPUT TO TTY OR D/P
1541	E9EE 68		PLA
1542	E9EF 60		RTS
1543	E9F0
1544	E9F0	;THIS ROUTINE OUTPUTS A CRLF TO ANY OUTPUT DEV
1545	E9F0	;LF AND NULL IS SENT ONLY TO TTY
1546	E9F0 A9 0D	CRLF	LDA	#CR
1547	E9F2 20 BC E9		JSR	OUTALL
1548	E9F5 20 42 E8		JSR	TTYTST	;TTY OR KB ?
1549	E9F8 D0 29		BNE	CR2J
1550	E9FA AD 13 A4		LDA	OUTFLG	;LF ONLY TO TTY
1551	E9FD C9 54		CMP	#'T'
1552	E9FF F0 22		BEQ	CR2J
1553	EA01 C9 4B		CMP	#'K'
1554	EA03 F0 1E		BEQ	CR2J
1555	EA05 C9 50		CMP	#'P'
1556	EA07 F0 1A		BEQ	CR2J
1557	EA09 A9 0A		LDA	#LF
1558	EA0B 20 BC E9		JSR	OUTALL
1559	EA0E A9 FF		LDA	#NULLC
1560	EA10 4C BC E9		JMP	OUTALL
1561	EA13
1562	EA13	;CRLF TO TERMINAL (TTY OR D/P) ONLY
1563	EA13 48	CRLOW	PHA		;SAVE A
1564	EA14 AD 13 A4		LDA	OUTFLG
1565	EA17 48		PHA
1566	EA18 20 01 E9		JSR	OUTLOW
1567	EA1B 20 F0 E9		JSR	CRLF
1568	EA1E 68		PLA
1569	EA1F 8D 13 A4		STA	OUTFLG
1570	EA22 68		PLA
1571	EA23 60	CR2J	RTS
1572	EA24
1573	EA24	;OUTPUT <CR> TO TTY IF SWITCH ON TTY & INFLG NOT L
1574	EA24	;DONT CLR DISPLAY BUT CLEARS PNTRS FOR NEXT LINE
1575	EA24	;IF PRNTR HAS PRINTED ON 21RST CHR DONT OUTPUT <CR>
1576	EA24 AD 12 A4	CRCK	LDA INFLG		;NO <CR> IF "L"
1577	EA27 C9 4C		CMP	#'L'
1578	EA29 D0 01		BNE	CRCK1
1579	EA2B 60		RTS
1580	EA2C 20 42 E8	CRCK1	JSR TTYTST		;CHECK IF TTY OR KB
1581	EA2F F0 E2		BEQ CRLOW		;BRNCH IF TTY
1582	EA31	;IF PRINTR		PTR=0 ,DO NOT CLR PRI
1583	EA31 AD 16 A4		LDA	CURPOS
1584	EA34 F0 05		BEQ	CRCK2	;IF PTR=0 ,NO <CR>
1585	EA36 A9 0D		LDA	#CR
1586	EA38 20 00 F0		JSR	OUTPRI
1587	EA3B A9 8D	CRCK2	LDA	#CR+$80	;<CR> ONLY FOR TV
1588	EA3D 4C 02 EF		JMP	OUTDP1
1589	EA40 EA		NOP
1590	EA41 EA		NOP
1591	EA42
1592	EA42	;WRITE	A THEN X IN ASCII TO THE OUTPUT DEV

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 ROL Priflg Restore FLG

Models: II

ROL PRIFLG

;RESTORE FLG

STA

II specifications