17-1111.fm Page 75 Wednesday, July 21, 1999 2:23 PM

Message

Description

See

 

 

Page(s)

 

 

 

Ring Only

Ring only alert type

29

 

 

 

Scan A

Non-wireline A system-type

56

 

selected

 

 

 

 

Scan AB

A then B scan system-type selected

56

 

 

 

Scan B

Wireline B scan system-type

56

 

selected

 

 

 

 

Scan BA

B then A scan system-type selected

56

 

 

 

Call Rcv

Call screening function

34

 

 

 

Pref’d SIDs

(System ID) Specific cellular ID

56

 

required (system-type selected)

 

 

 

 

Signal Mtr

Signal strength meter

14, 26

 

 

 

Std Setting

Appears during master reset proce-

56

 

dure

 

 

 

 

Std AB

Standard non-wireline system-type

56

 

selected

 

 

 

 

Std BA

Standard wireline system-type

56

 

selected

 

 

 

 

Turbo Dial

One-touch dialing

32

 

 

 

Scrpad Tone

Scratchpad tone

27

 

 

 

Vib Off

Vibration alert off (appears with

29

 

Ring Off)

 

Vib On

Vibration alert on (appears with

29

 

Ring On)

 

Vibrate Only

Vibration only alert type

29

 

 

 

75

Page 75
Image 75
Radio Shack CT-502 Scan a, Scan AB, Scan BA, Pref’d SIDs, Std Setting, Std AB, Std BA, Scrpad Tone, Ring Off Vib On

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.