Tryjmp LDA, IMMED1 LDX | Apple II specification

3725	FC3A 4C CB FC		JMP	OPCOMP
3726	FC3D 4C B6 FC	HATCJ	JMP	HATCH
3727	FC40 A9 04	TRY34	LDA	#04	;CHECK FOR ABSOLUTE OR ZP,X ORZP,`
3728	FC42 CD 31 A4		CMP	TEMPX
3729	FC45 90 15		BCC	ABSIND
3730	FC47 A2 02		LDX	#02
3731	FC49 20 F1 FD		JSR	XORYZ	;CC = X, CS = Y, NE = ABSOLUTE
3732	FC4C D0 58		BNE	ABSOL
3733	FC4E 90 05		BCC	ZPX
3734	FC50 A2 03	ZPY	LDX	#03	;CARRY SET SO ZP,Y MODE
3735	FC52 4C CB FC		JMP	OPCOMP
3736	FC55 A2 04	ZPX	LDX	#04	;CARRY CLEAR SO ZP,X MODE
3737	FC57 4C CB FC		JMP	OPCOMP
3738	FC5A B0 69	TRY56	BCS	ERRORM
3739	FC5C 20 EF FD	ABSIND JSR		XORY	;CC=ABS,X	CS=ABS,Y NE=ERROR
3740	FC5F D0 64		BNE	ERRORM
3741	FC61 90 0F		BCC	ABSX
3742	FC63 A9 09	ABSY	LDA	#09
3743	FC65 CD 2E 01		CMP	TYPE
3744	FC68 D0 04		BNE	ABSY1
3745	FC6A A2 0E		LDX	#$0E
3746	FC6C D0 5D		BNE	OPCOMP
3747	FC6E A2 08	ABSY1	LDX	#$08
3748	FC70 D0 59		BNE	OPCOMP
3749	FC72 A2 09	ABSX	LDX	#09	;CARRY CLEAR SO ABS,X MODE
3750	FC74 D0 55		BNE	OPCOMP
3751	FC76 AD 36 01	PAREN	LDA	ADFLD+3	;SEE IF (HH,X),(HH)Y OR (HHHH)
3752	FC79 C9 2C		CMP	#','	;(HHX) (HH),Y ARE OK TOO
3753	FC7B F0 04		BEQ	INDX	;COMMA IN 4TH POSITION = (HH,X)
3754	FC7D C9 58		CMP	#'X'	;X IN 4TH POSITION = (HHX)
3755	FC7F D0 04		BNE	TRYINY
3756	FC81 A2 0B	INDX	LDX	#$0B
3757	FC83 D0 46		BNE	OPCOMP
3758	FC85 C9 29	TRYINY CMP		#')'	;")" IN 4TH POS = (HH)Y OR (HH),Y
3759	FC87 D0 0B		BNE	TRYJMP
3760	FC89 20 EF FD		JSR	XORY	;CHCK TO SEE IF Y INDEX REG DESIRE
3761	FC8C D0 37		BNE	ERRORM
3762	FC8E 90 35		BCC	ERRORM
3763	FC90 A2 0A		LDX	#$0A
3764	FC92 D0 37		BNE	OPCOMP
3765	FC94 AD 38 01	TRYJMP LDA		ADFLD+5	;CHECK FOR FINAL PAREN
3766	FC97 C9 29		CMP	#')'
3767	FC99 D0 2A		BNE	ERRORM
3768	FC9B AD 2E 01		LDA	TYPE	;CONFIRM CORRECT ADDRESS TYPE
3769	FC9E C9 0B		CMP	#$0B
3770	FCA0 D0 23		BNE	ERRORM
3771	FCA2 A2 0D		LDX	#$0D	;OK, FORM IS JMP (HHHH)
3772	FCA4 D0 25		BNE	OPCOMP
3773	FCA6 AD 2E 01	ABSOL	LDA	TYPE	;CHECK FOR BRANCH TO ABSOLUTE LOC
3774	FCA9 C9 0C		CMP	#$0C
3775	FCAB D0 05		BNE	ABSOL1
3776	FCAD A2 02		LDX	#02
3777	FCAF 4C CB FC		JMP	OPCOMP
3778	FCB2 A2 0C	ABSOL1 LDX		#$0C
3779	FCB4 D0 15		BNE	OPCOMP
3780	FCB6	;SELECT IMMEDIATE ADDRESSING TYPE
3781	FCB6 AD 2E 01	HATCH	LDA	TYPE
3782	FCB9 C9 01		CMP	#01
3783	FCBB F0 04		BEQ	IMMED1
3784	FCBD A2 07		LDX	#07
3785	FCBF D0 0A		BNE	OPCOMP
3786	FCC1 A2 06	IMMED1 LDX		#06

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 Tryjmp LDA, IMMED1 LDX

Models: II

CMP

CMP

CMP

CMP

TRYJMP LDA

CMP

CMP

CMP

CMP

IMMED1 LDX

II specifications