+------------------------------------------------------------------------

TOPIC -- SYM Computer -- SYM Monitor listing

+------------------------------------------------------------------------

SYM-1 SUPERMON AND AUDIO CASSETTE INTERFACE SOURCES

COMBINED AND CONVERTED TO TELEMARK ASSEMBLER (TASM) V3.1

0002

0000

;

 

 

 

0003

0000

;*****

 

 

 

0004

0000

;***** COPYRIGHT 1979 SYNERTEK SYSTEMS CORPORATION

0005

0000

;***** VERSION 2

4/13/79 "SY1.1"

0006

A600

 

*=$A600

 

;SYS RAM (ECHOED AT TOP OF MEM)

0007

A600

SCPBUF .BLOCK

$20

;SCOPE BUFFER LAST 32 CHARS

0008

A620

RAM

=*

 

;DEFAULT BLK FILLS STARTING HERE

0009

A620

JTABLE

.BLOCK

$10

; 8JUMPS - ABS ADDR, LO HI ORDER

0010

A630

TAPDEL

.BLOCK

1

;KH TAPE DELAY

0011

A631

KMBDRY

.BLOCK

1

;KIM TAPE READ BOUNDARY

0012

A632

HSBDRY

.BLOCK

1

;HS TAPE READ BOUNDARY

0013

A633

SCR3

.BLOCK

1

;RAM SCRATCH LOCS 3-F

0014

A634

SCR4

.BLOCK

1

 

0015

A635

TAPET1

.BLOCK

1

;HS TAPE 1/2 BIT TIME

0016

A636

SCR6

.BLOCK

1

 

0017

A637

SCR7

.BLOCK

1

 

0018

A638

SCR8

.BLOCK

1

 

0019

A639

SCR9

.BLOCK

1

 

0020

A63A

SCRA

.BLOCK

1

 

0021

A63B

SCRB

.BLOCK

1

 

0022

A63C

TAPET2

.BLOCK

1

;HS TAPE 1/2 BIT TIME

0023

A63D

SCRD

.BLOCK

1

 

0024

A63E

RC

=SCRD

 

 

0025

A63E

SCRE

.BLOCK

1

 

0026

A63F

SCRF

.BLOCK

1

 

0027

A640

DISBUF

.BLOCK

5

;DISPLAY BUFFER

0028

A645

RDIG

.BLOCK

1

;RIGHT MOST DIGIT OF DISPLAY

0029

A646

 

.BLOCK

3

;NOT USED

0030

A649

PARNR

.BLOCK

1

;NUMBER OF PARMS RECEIVED

0031

A64A

;

 

 

 

0032

A64A

; 3 16

BIT PARMS, LO HI ORDER

0033

A64A

; PASSED TO EXECUTE BLOCKS

0034

A64A

;

 

 

 

0035

A64A

P3L

.BLOCK

1

 

0036

A64B

P3H

.BLOCK

1

 

0037

A64C

P2L

.BLOCK

1

 

0038

A64D

P2H

.BLOCK

1

 

0039

A64E

P1L

.BLOCK

1

 

0040

A64F

P1H

.BLOCK

1

 

0041

A650

PADBIT

.BLOCK

1

;PAD BITS FOR CARRIAGE RETURN

0042

A651

SDBYT

.BLOCK

1

;SPEED BYTE FOR TERMINAL I/O

0043

A652

ERCNT

.BLOCK

1

; ERROR COUNT (MAX $FF)

0044

A653

; BIT 7 = ECHO /NO ECHO, BIT 6 = CTL O TOGGLE SW

0045

A653

TECHO

.BLOCK

1

;TERMINAL ECHO LAG

0046

A654

; BIT7

=CRT IN, 6 =TTY IN, 5 = TTY OUT, 4 = CRT OUT

0047

A654

TOUTFL

.BLOCK

1

;OUTPUT FLAGS

0048

A655

KSHFL

.BLOCK

1

;KEYBOARD SHIFT FLAG

0049

A656

TV

.BLOCK

1

;TRACE VELOCITY (0=SINGLE STEP)

0050

A657

LSTCOM

.BLOCK

1

;STORE LAST MONITOR COMMAND

0051

A658

MAXRC

.BLOCK

1

;MAXIMUM REC LENGTH FOR MEM DUMP

0052

A659

;

 

 

 

0053

A659

; USER REG'S FOLLOW

0054

A659

;

 

 

 

 

 

 

 

 

 

Page 101 Page 103
Page 102
Image 102
Apple II manual Tapdel, Hsbdry, Toutfl, Lstcom
Page 101 Page 103

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.
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