L2E DCM | Apple II specs

279	1ED7	60				RTS		RETURN ANS=(.5+Z/(-Z+D+C2ZZ-
B2/(ZZ+A2))2**(INT+1)
280	1ED8	80	5C		L2E	DCM	1.4426950409		LOG BASE 2 OF E
		55	1E
281	1EDC	86	57		A2	DCM	87.417497202
		6A	E1
282	1EE0	89	4D		B2	DCM	617.9722695
		3F	1D
283	1EE4	7B	46		C2	DCM	.03465735903
		4A	70
284	1EE8	83	4F		D	DCM	9.9545957821
		A3	03
285					*
286					*
287					*	BASIC FLOATING POINT ROUTINES
288					*
289	1F00					ORG $1F00		START OF BASIC FLOATING POINT ROUTINES
290	1F00	18			ADD	CLC		CLEAR CARRY
291	1F01	A2	02			LDX =$02		INDEX FOR 3-BYTE ADD
292	1F03	B5	09		ADD1	LDA M1,X
293	1F05	75	05			ADC M2,X		ADD A BYTE OF MANT2 TO MANT1
294	1F07	95	09			STA M1,X
295	1F09	CA				DEX		ADVANCE INDEX TO NEXT MORE SIGNIF.BYTE
296	1F0A	10	F7			BPL	ADD1	LOOP UNTIL DONE.
297	1F0C	60				RTS		RETURN
298	1F0D	06	03		MD1	ASL SIGN		CLEAR LSB OF SIGN
299	1F0F	20	12	1F		JSR ABSWAP		ABS VAL OF MANT1, THEN SWAP MANT2
300	1F12	24	09		ABSWAP	BIT	M1	MANT1 NEG?
301	1F14	10	05			BPL	ABSWP1	NO,SWAP WITH MANT2 AND RETURN
302	1F16	20	8F	1F		JSR	FCOMPL	YES, COMPLIMENT IT.
303	1F19	E6	03			INC	SIGN	INCR SIGN, COMPLEMENTING LSB
304	1F1B	38			ABSWP1 SEC			SET CARRY FOR RETURN TO MUL/DIV
305					*
306					*	SWAP EXP/MANT1 WITH EXP/MANT2
307					*
308	1F1C	A2	04		SWAP	LDX =$04		INDEX FOR 4-BYTE SWAP.
309	1F1E	94	0B		SWAP1	STY E-1,X
310	1F20	B5	07			LDA X1-1,X		SWAP A BYTE OF EXP/MANT1 WITH
311	1F22	B4	03			LDY X2-1,X		EXP/MANT2 AND LEAVEA COPY OF
312	1F24	94	07			STY X1-1,X		MANT1 IN E(3BYTES). E+3 USED.
313	1F26	95	03			STA X2-1,X
314	1F28	CA				DEX		ADVANCE INDEX TO NEXT BYTE
315	1F29	D0	F3			BNE SWAP1		LOOP UNTIL DONE.
316	1F2B	60				RTS
317					*
318					*
319					*
320					*	CONVERT 16 BIT INTEGER IN M1(HIGH) AND M1+1(LOW) TO F.P.
321					*	RESULT IN EXP/MANT1.			EXP/MANT2 UNEFFECTED
322					*
323					*
324	1F2C	A9	8E		FLOAT	LDA =$8E
325	1F2E	85	08			STA X1		SET EXPN TO 14 DEC
326	1F30	A9	00			LDA =0		CLEAR LOW ORDER BYTE
327	1F32	85	0B			STA M1+2
328	1F34	F0	08			BEQ NORM		NORMALIZE RESULT
329	1F36	C6	08		NORM1	DEC X1		DECREMENT EXP1
330	1F38	06	0B			ASL M1+2
331	1F3A	26	0A			ROL M1+1		SHIFT MANT1 (3 BYTES) LEFT
332	1F3C	26	09			ROL M1
333	1F3E	A5	09		NORM	LDA M1		HIGH ORDER MANT1 BYTE
334	1F40	0A				ASL		UPPER TWO BITS UNEQUAL?

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 L2E DCM

Models: II

L2E

DCM

II specifications