17-1111.fm Page 25 Wednesday, July 21, 1999 2:23 PM

Display Shows

Function Description and

See

Default Setting

 

Page

 

 

 

 

 

 

 

 

 

 

Auto Lock

Sets the phone to auto-

Off

46

 

matically lock when you

 

 

 

turn power on

 

 

 

 

 

 

Turbo Dial

Turns off/on one-touch

On

32

 

dialing

 

 

 

 

 

 

Emergcy Call

Turns off/on the emer-

On

33

 

gency dialing display

 

 

 

 

 

 

Number Pref

Can be turned off so the

On

33

 

phone displays the speed

 

 

 

dial name (instead of the

 

 

 

number) first

 

 

 

 

 

 

Call Rcv

Sets the phone to alert

Off

34

 

you of a call using a

 

 

 

unique tone (compatible

 

 

 

with optional call-forward-

 

 

 

ing service)

 

 

 

 

 

 

Remind Msg

Sets the phone to alert

On

35

 

you of messages

 

 

 

received (with optional

 

 

 

messaging services)

 

 

 

 

 

 

Select

(Function not available

N/A

N/A

Languag

on this phone)

 

 

 

 

 

 

PIN InActiv or

Sets the phone to auto-

Inac-

59

Activ

matically send a cellular

tive

 

 

system PIN with every

 

 

 

call

 

 

 

 

 

 

25

Page 25
Image 25
Radio Shack CT-502 Auto Lock, Turbo Dial, Emergcy Call, Number Pref, Call Rcv, Remind Msg, Languag, PIN InActiv or

CT-502 specifications

The Radio Shack CT-502 is a remarkable device that stands out in the world of vintage technology, particularly known for its versatility and functionality as a portable computer. Launched during a time when personal computing was rapidly evolving, the CT-502 embodies the spirit of innovation that characterized the early days of computing technology.

At its core, the Radio Shack CT-502 comes equipped with a Zilog Z80 microprocessor, a staple of many early personal computers that provided solid performance for its time. This CPU offers an 8-bit architecture with a clock speed of 2.5 MHz, allowing users to execute tasks efficiently. The CT-502 features a memory capacity of 64 KB of RAM, which can be expanded, making it suitable for various applications, from basic text processing to simple programming tasks.

One of the standout features of the CT-502 is its dual built-in floppy disk drives, which enable users to easily load and save data. This was particularly advantageous during the era when storage solutions were evolving, as it allowed for quick access to programs and files. The 5.25-inch floppy disks used by the CT-502 became a standard for many personal computing applications, ensuring wide compatibility with software.

The device also features a compact, built-in keyboard that boasts a full set of function keys, essential for efficient data entry and navigation. Complementing the keyboard is a 40-character by 24-line monochrome display, which provides a clear view of text and applications, ideal for programming and document creation.

In terms of connectivity, the CT-502 includes a variety of ports such as serial and parallel interfaces, allowing users to connect external devices like printers and modems. This functionality enhanced the versatility of the system and integrated it into the growing network of computers.

Moreover, the Radio Shack CT-502 runs on the TRS-DOS operating system, designed specifically for the TRS line of computers. This operating system was user-friendly for its time, enabling users to manage files and perform various tasks without deep technical knowledge.

In summary, the Radio Shack CT-502 represents a significant milestone in early computing history, offering a combination of portability, ease of use, and expansion capabilities. With its reliable hardware, user-friendly interface, and diverse connectivity options, it remains a fondly remembered piece of technology that paved the way for modern personal computers.