BNE Lcerr Last Char not | Apple II specification

1853	8D03	C9	2F		LT7HB	CMP	#'/'	;EA, MUST BE "/"
1854	8D05	D0	29			BNE	LCERR	;LAST CHAR NOT '/'
1855	8D07	F0	15			BEQ LT8A		;(ALWAYS)
1856	8D09
1857	8D09				; READ KIM		DATA
1858	8D09
1859	8D09	20	2A	8E	LOADT7 JSR		RDBYT
1860	8D0C B0		26			BCS	LDT7A	;NONHEX OR LAST CHAR
1861	8D0E 20		77	8E		JSR	CHKT	;UPDATE CHECKSUM (PACKED BYTE)
1862	8D11	A0	00			LDY	#0	;STORE BYTE
1863	8D13	91	FE			STA	(BUFADL),Y
1864	8D15	E6	FE			INC	BUFADL	;BUMP BUFFER ADR
1865	8D17	D0	F0			BNE	LOADT7	;CARRY?
1866	8D19	E6	FF			INC	BUFADH
1867	8D1B 4C		09	8D		JMP	LOADT7
1868	8D1E
1869	8D1E				; TEST CHECKSUM & FINISH
1870	8D1E
1871	8D1E				LOADT8 =*
1872	8D1E 20		26	8E	LT8A	JSR RDBYTX		;CHECK SUM
1873	8D21	CD	36	A6		CMP	SCR6
1874	8D24	D0	16			BNE	CKERR
1875	8D26	20	26	8E		JSR	RDBYTX
1876	8D29	CD	37	A6		CMP	SCR7
1877	8D2C D0		0E			BNE	CKERR	;CHECK SUM ERROR
1878	8D2E F0		11			BEQ OKEXIT		;(ALWAYS)
1879	8D30
1880	8D30	A9	2F		LCERR	LDA	#LSTCHR	;LAST CHAR IS NOT '/'
1881	8D32	D0	0A			BNE NGEXIT		;(ALWAYS)
1882	8D34
1883	8D34	C9	2F		LDT7A	CMP #'/'		;LAST OR NONHEX?
1884	8D36	F0	E6			BEQ LOADT8		;LAST
1885	8D38				FRERR			;FRAMING ERROR
1886	8D38	A9	FF		NHERR	LDA	#NONHEX	;KIM ONLY, NON HEX CHAR READ
1887	8D3A D0		02			BNE NGEXIT		;(ALWAYS)
1888	8D3C
1889	8D3C A9		CC		CKERR	LDA #CHECK		;CHECKSUM ERROR
1890	8D3E
1891	8D3E 38				NGEXIT SEC			;ERROR INDICATOR TO MONITOR IS CARRY
1892	8D3F B0		01			BCS EXIT		;(ALWAYS)
1893	8D41
1894	8D41	18			OKEXIT CLC			;NO ERROR
1895	8D42
1896	8D42	24	FD		EXIT	BIT	MODE
1897	8D44	50	08			BVC	EX10	;READING WRONG REC?
1898	8D46	A0	80			LDY	#$80
1899	8D48	4C	78	8C		JMP LOADT		;RESTART SEARCH
1900	8D4B
1901	8D4B 68				USRREQ PLA			;USER REQUESTS EXIT
1902	8D4C 68					PLA
1903	8D4D 38					SEC
1904	8D4E A2		CC		EX10	LDX	#$CC
1905	8D50	D0	69			BNE	STCC	;STOP TAPE, RETURN
1906	8D52	AD	02	A0	SYNC	LDA	DDRIN	;CHANGE DATA DIRECTION
1907	8D55	29	BF			AND	#$BF
1908	8D57	8D	02	A0		STA	DDRIN
1909	8D5A A9		00			LDA	#0
1910	8D5C 8D		0B	A0		STA	VIAACR
1911	8D5F AD		31	A6		LDA	KMBDRY	;SET UP BOUNDARY
1912	8D62	24	FD			BIT	MODE
1913	8D64	10	03			BPL	SY100
1914	8D66	AD	32	A6		LDA	HSBDRY

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.

CMP

BNE

LCERR

;LAST CHAR NOT '/'

CMP

CMP

II specifications