BPL HASHUS+2 | Apple II instruction

0241	8131	10	02			BPL	HASHUS+2
0242	8133	0A			HASHUS ASL		A	;HASH 'USER' CMDS TO ONE BYTE A
0243	8134	0A				ASL	A	;U0 = $14 THRU U17 =$1B
0244	8135	8D	57	A6		STA	LSTCOM
0245	8138	20	1B	8A		JSR	INCHR	;GET SECOND
0246	813B	F0	C2			BEQ	GETCOM
0247	813D	18				CLC
0248	813E	6D	57	A6		ADC	LSTCOM
0249	8141	29	0F			AND	#$0F
0250	8143	09	10			ORA	#$10
0251	8145	10	D9			BPL	STOCOM
0252	8147	FF FF FF				.DB $FF,$FF,$FF ;NOT USED
0253	814A				;
0254	814A				;DISPATCH TO EXEC BLK 0PARM, 1PARM, 2PARM, OR 3PARM
0255	814A				;
0256	814A	C9	0D		DISPAT CMP #$0D			;C/R IF OK ELSE URSVEC
0257	814C	D0	20			BNE	HIPN
0258	814E	AD 57 A6				LDA	LSTCOM
0259	8151	AE 49 A6				LDX	PARNR
0260	8154	D0	03			BNE	M12
0261	8156	4C	95	83		JMP	BZPARM	;0 PARM BLOCK
0262	8159	E0	01		M12	CPX	#$01
0263	815B	D0	03			BNE	M13
0264	815D	4C	DA 84			JMP	B1PARM	;1 PARM BLOCK
0265	8160	E0	02		M13	CPX	#$02
0266	8162	D0	03			BNE	M14
0267	8164	4C	19	86		JMP	B2PARM	;2 PARM BLOCK
0268	8167	E0	03		M14	CPX	#$03
0269	8169	D0	03			BNE	HIPN
0270	816B	4C	14	87		JMP	B3PARM	;3 PARM BLOCK
0271	816E	6C	6A	A6	HIPN	JMP (URSVEC+1)		;ELSE UNREC SYNTAX VECTOR
0272	8171				;
0273	8171				; ERMSG - PRINT ACC IN HEX IF CARRY SET
0274	8171				;
0275	8171	90	44		ERMSG	BCC	M15
0276	8173	48				PHA
0277	8174	20	4D	83		JSR	CRLF
0278	8177	A9	45			LDA	#'E'
0279	8179	20	47	8A		JSR	OUTCHR
0280	817C	A9	52			LDA	#'R'
0281	817E	20	47	8A		JSR	OUTCHR
0282	8181	20	42	83		JSR	SPACE
0283	8184	68				PLA
0284	8185	4C	FA 82			JMP	OUTBYT
0285	8188				;
0286	8188				; SAVER - SAVE ALL REG'S + FLAGS ON STACK
0287	8188				; RETURN WITH F,A,X,Y UNCHANGED
0288	8188				; STACK HAS		FLAGS,A,X,Y, PUSHED
0289	8188	08			SAVER	PHP
0290	8189	48				PHA
0291	818A	48				PHA
0292	818B	48				PHA
0293	818C	08				PHP
0294	818D	48				PHA
0295	818E	8A				TXA
0296	818F	48				PHA
0297	8190	BA				TSX
0298	8191	BD 09 01				LDA	$0109,X
0299	8194	9D	05	01		STA	$0105,X
0300	8197	BD 07 01				LDA	$0107,X
0301	819A	9D	09	01		STA	$0109,X
0302	819D	BD 01 01				LDA	$0101,X

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 BPL HASHUS+2

Models: II

BPL

HASHUS+2

II specifications