STA BASL,Y Replace Flashing Screen | Apple II specification

FD26: 91 28	767		STA	(BASL),Y	;REPLACE FLASHING SCREEN
FD28: AD 00 C0	768		LDA	KBD	;GET KEYCODE
FD2B: 2C 10 C0	769		BIT	KBDSTRB	;CLR KEY STROBE
FD2E: 60	770		RTS
FD2F: 20 0C FD	771	ESC	JSR	RDKEY	;GET KEYCODE
FD32: 20 2C FC	772		JSR	ESC1	;	HANDLE ESC FUNC.
FD35: 20 0C FD	773	RDCHAR	JSR	RDKEY	;READ KEY
FD38: C9 9B	774		CMP	#$9B	;ESC?
FD3A: F0 F3	775		BEQ	ESC	;	YES, DON'T RETURN
FD3C: 60	776		RTS
FD3D: A5 32	777	NOTCR	LDA	INVFLG
FD3F: 48	778		PHA
FD40: A9 FF	779		LDA	#$FF
FD42: 85 32	780		STA	INVFLG	;ECHO USER LINE
FD44: BD 00 02	781		LDA	IN,X	;	NON INVERSE
FD47: 20 ED FD	782		JSR	COUT
FD4A: 68	783		PLA
FD4B: 85 32	784		STA	INVFLG
FD4D: BD 00 02	785		LDA	IN,X
FD50: C9 88	786		CMP	#$88	;CHECK FOR EDIT KEYS
FD52: F0 1D	787		BEQ	BCKSPC	;	BS, CTRL-X
FD54: C9 98	788		CMP	#$98
FD56: F0 0A	789		BEQ	CANCEL
FD58: E0 F8	790		CPX	#$F8	;MARGIN?
FD5A: 90 03	791		BCC	NOTCR1
FD5C: 20 3A FF	792		JSR	BELL	;	YES, SOUND BELL
FD5F: E8	793	NOTCR1	INX		;ADVANCE INPUT INDEX
FD60: D0 13	794		BNE	NXTCHAR
FD62: A9 DC	795	CANCEL	LDA	#$DC	;BACKSLASH AFTER CANCELLED LINE
FD64: 20 ED FD	796		JSR	COUT
FD67: 20 8E FD	797	GETLNZ	JSR	CROUT	;OUTPUT CR
FD6A: A5 33	798	GETLN	LDA	PROMPT
FD6C: 20 ED FD	799		JSR	COUT	;OUTPUT PROMPT CHAR
FD6F: A2 01	800		LDX	#$01	;INIT INPUT INDEX
FD71: 8A	801	BCKSPC	TXA		;	WILL BACKSPACE TO 0
FD72: F0 F3	802		BEQ	GETLNZ
FD74: CA	803		DEX
FD75: 20 35 FD	804	NXTCHAR	JSR	RDCHAR
FD78: C9 95	805		CMP	#PICK	;USE SCREEN CHAR
FD7A: D0 02	806		BNE	CAPTST	;	FOR CTRL-U
FD7C: B1 28	807		LDA	(BASL),Y
FD7E: C9 E0	808	CAPTST	CMP	#$E0
FD80: 90 02	809		BCC	ADDINP	;CONVERT TO CAPS
FD82: 29 DF	810		AND	#$DF
FD84: 9D 00 02	811	ADDINP	STA	IN,X	;ADD TO INPUT BUF
FD87: C9 8D	812		CMP	#$8D
FD89: D0 B2	813		BNE	NOTCR
FD8B: 20 9C FC	814		JSR	CLREOL	;CLR TO EOL IF CR
FD8E: A9 8D	815	CROUT	LDA	#$8D
FD90: D0 5B	816		BNE	COUT
FD92: A4 3D	817	PRA1	LDY	A1H	;PRINT CR,A1 IN HEX
FD94: A6 3C	818		LDX	A1L
FD96: 20 8E FD	819	PRYX2	JSR	CROUT
FD99: 20 40 F9	820		JSR	PRNTYX
FD9C: A0 00	821		LDY	#$00
FD9E: A9 AD	822		LDA	#$AD	;PRINT '-'
FDA0: 4C ED FD	823		JMP	COUT
FDA3: A5 3C	824	XAM8	LDA	A1L
FDA5: 09 07	825		ORA	#$07	;SET TO FINISH AT
FDA7: 85 3E	826		STA	A2L	;	MOD 8=7
FDA9: A5 3D	827		LDA	A1H
FDAB: 85 3F	828		STA	A2H

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 STA BASL,Y Replace Flashing Screen

Models: II

STA

(BASL),Y

;REPLACE FLASHING SCREEN

II specifications