40 INPUT "ENTER # BYTES " , B

50IF NOT B THEN 40 : REM AT LEAST 1

60POKE 778 , B : REM POKE LENGTH

70INPUT "ENTER DESTINATION " , A

80IF A > PEEK (203) - 1 THEN 70

90IF A < PEEK (205) + 1 THEN 70

100POKE 776 , A : REM POKE DESTINATION

110M = 8 : GOSUB 160 : REM DISPLAY

120CALL 768 : REM GOTO $0300

130M = A : GOSUB 160 : REM DISPLAY

140M = O : GOSUB 160 : REM DISPLAY

150PRINT : PRINT : GOTO 30

160POKE 60 , 0 : POKE 61 , M

170CALL -605 : RETURN : REM XAM8 IN MONITOR

Listing #2

300:20 89 F6 11 00 08 12 00 00 13 00 00 41 52 F3 07 FB 00 60

Listing #3

SWEET 16

 

 

 

 

 

 

$300

20

89

F6

JSR

$F689

$303

11

00

08

SET

R1

source address

$306

12

00

00

SET

R2

destination address

 

 

 

 

A

 

 

$309

13

00

00

SET

R3

length

 

 

 

 

B

 

 

$30C

41

 

 

LD

@R1

 

$30D

52

 

 

ST

@R2

 

$30E

F3

 

 

DCR

R3

 

$30F

07

 

 

BNZ

$30C

 

$311

00

 

 

RTN

 

 

$312

60

 

 

RTS

 

 

Data will be poked from the Integer Basic program:

"A"

from

Line

100

"B"

from

Line

60

Page 60
Image 60
Apple II manual Poke 776 , a REM Poke Destination, Print Print Goto, Call -605 Return REM XAM8 in Monitor, Sweet, Rts

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.