0666

E35F 20

BD ED

 

JSR

ADDBK1

;JUST OUTPUT BLK CNT

0667

E362

A2

01

 

 

LDX

#1

;RESTORE X

0668

E364

 

 

 

;CHECK IF FILE IS CORRECT

0669

E364

BD

16

01

LOADT2 LDA TABUFF,X

;NOW CHCK FILE NAME

0670

E367

DD

2D

A4

 

CMP

NAME-1,X

 

0671

E36A D0

C3

 

 

BNE

LOADTA

;IF NO FILENAME GET

0672

E36C E8

 

 

 

INX

 

;ANOTHER BLOCK

0673

E36D E0

06

 

 

CPX

#6

;FILENAME=5 CHRS

0674

E36F D0

F3

 

 

BNE

LOADT2

 

0675

E371

8E

36

A4

 

STX

TAPTR

;SAVE TAPE BUFF PTR

0676

E374

EE

11

A4

 

INC

PRIFLG

;OUTPUT MSG ONLY TO DISPLAY

0677

E377

A9

00

 

 

LDA

#0

;CLEAR DISPLAY POINTER

0678

E379

8D

15

A4

 

STA

CURPO2

 

0679

E37C A0

66

 

 

LDY

#TMSG7-M1

;PRINT "LOAD " WITHOUT CLR DISPL

0680

E37E 20

96

E3

 

JSR

CKER1

 

0681

E381

CE

11

A4

 

DEC

PRIFLG

 

0682

E384

60

 

 

 

RTS

 

 

0683

E385

 

 

 

 

 

 

 

0684

E385

 

 

 

;LINE CKSUM ERROR

 

0685

E385

20

8E

E3

CKERR

JSR CKER0

;SUBR SO MNEM ENTRY CAN USE IT

0686

E388

20

DB E2

 

JSR WRITAZ

;WRITE ADDR

0687

E38B 4C

A1

E1

 

JMP

COMIN

 

0688

E38E 20

FE E8

CKER0

JSR

LL

;SET DEFAULT DEVICES

0689

E391

20

24

EA

 

JSR

CRCK

;<CR>

0690

E394

A0

52

 

CKER00 LDY

#TMSG3-M1

;PRINT "ERROR"

0691

E396

B9

00

E0

CKER1

LDA

M1,Y

;DONT CLR DISPLAY TO THE RIGHT

0692

E399

C9

3B

 

 

CMP

#SEMICOLON

 

0693

E39B F0

06

 

 

BEQ

CKER2

 

0694

E39D 20

7A

E9

 

JSR OUTPUT

;ONLY TO TERMINAL

0695

E3A0 C8

 

 

 

INY

 

 

0696

E3A1 D0

F3

 

 

BNE

CKER1

 

0697

E3A3 60

 

 

CKER2

RTS

 

 

0698

E3A4

 

 

 

 

 

 

 

0699

E3A4

 

 

 

;LOAD ROUTINE FROM TAPE WITH KIM-1 FORMAT

0700

E3A4 20

4D

EB

LOADKI JSR CLRCK

;CLEAR CKSUM

0701

E3A7 20

EA ED

LOADK1 JSR TAISET

;SET TAPE FOR INPUT

0702

E3AA 20

29

EE

LOADK2 JSR GETTAP

;READ CHARACTER FROM TAPE

0703

E3AD C9

2A

 

 

CMP #'*'

;BEGINNING OF FILE?

0704

E3AF F0

06

 

 

BEQ LOADK3

;YES,BRNCH

0705

E3B1 C9

16

 

 

CMP #$16

;IF NOT * SHOULD BE SYN

0706

E3B3 D0

F2

 

 

BNE

LOADK1

 

0707

E3B5 F0

F3

 

 

BEQ

LOADK2

 

0708

E3B7 20

FD E3

LOADK3 JSR

RBYTE

;READ ID FROM TAPE

0709

E3BA 8D

21

A4

 

STA SAVA

;SAVE ID

0710

E3BD

 

 

 

;NOW GET ADDR TO DISPLAY

0711

E3BD

 

 

 

;& COMPARE

ID AFTERWARDS

0712

E3BD 20

4B

E5

 

JSR

CHEKAR

;GET START ADDR LOW

0713

E3C0 8D

1C

A4

 

STA

ADDR

 

0714

E3C3 20

4B

E5

 

JSR

CHEKAR

;GET START ADDR HIGH

0715

E3C6 8D

1D

A4

 

STA

ADDR+1

 

0716

E3C9 20

25

E4

 

JSR

GETID

;ID FROM HIM

0717

E3CC CD

21

A4

 

CMP

SAVA

;DO IDS MATCH?

0718

E3CF D0

D3

 

 

BNE

LOADKI

;NO ,GET ANOTHER FILE

0719

E3D1 A2

02

 

LOADK5 LDX

#$02

;GET 2 CHARS

0720

E3D3 20

29

EE

LOADK6 JSR

GETTAP

;1 CHAR FROM TAPE

0721

E3D6 C9

2F

 

 

CMP

#'/'

;LAST CHAR ?

0722

E3D8 F0

0E

 

 

BEQ

LOADK7

;YES,BRNCH

0723

E3DA 20

84

EA

 

JSR

PACK

;CONVERT TO HEX

0724

E3DD B0

A6

 

 

BCS CKERR

;NOT HEX CHAR SO ERROR

0725

E3DF CA

 

 

 

DEX

 

 

0726

E3E0 D0

F1

 

 

BNE

LOADK6

 

0727

E3E2 20

13

E4

 

JSR

STBYTE

;STORE & CHCK MEM FAIL

 

 

 

 

 

 

 

 

 

Page 151
Image 151
Apple II manual LOADK5 LDX

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.