49-840in.fm Page 16 Thursday, August 19, 1999 10:47 AM

If the sensor has both warning and alert triggers, use red wire tap-ins to connect the warning trigger to the harness’s green wire and the alert trigger to the harness’s yellow wire.

CONNECTING ACCESSORY DEVICES

Follow the instructions that come with the accessory to mount and power it.

To have the alarm trigger the device when you press TRUNK on the re- mote, use a relay (not supplied) to connect the device’s control input to the main wiring harness’s white wire with yellow stripe.

To have the alarm trigger the device when you press FINDER on the re- mote, use a relay (not supplied) to connect the device’s control input to the main wiring harness’s white wire with red stripe.

Note: Auxiliary switched outputs con- nect to ground when they are activat- ed. If your auxiliary device requires +12 volts for activation, or if you need help using relays to make these con- nections, call the Auto Alarm Helpline at 1-800-598-2527 for assistance.

COMPLETING THE

INSTALLATION

Be sure you have the remote control handy, then follow these steps to complete the installation.

1.Reconnect your vehicle battery’s negative (–) battery cable.

Note: You must re-enter any pro- grammed information into elec- tronic devices in your vehicle, such as clocks and radios, after you connect the cable.

2.Plug the main wiring harness into the main module. Then immedi- ately press ARM/DISARM on one of the keychain remotes. The alarm should chirp once, the parking lights should flash and the status indicator blinks. The alarm is now armed. Press ARM/ DISARM again to disarm the sys- tem.

If the alarm does not chirp, immediately disconnect the har- ness and the vehicle’s negative

(–)battery cable. Recheck all connections and check your vehi- cle’s and the alarm’s fuses to be sure none have blown. If you can- not determine the problem, call 1- 800-598-2527 for additional assistance.

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Need Help? Call 1-800-598-2527

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Radio Shack RS-4000 installation manual Completing Installation, Connecting Accessory Devices

RS-4000 specifications

The Radio Shack RS-4000 is an iconic piece of technology that embodies the spirit of innovation in the consumer electronics industry during the late 20th century. Launched in the 1980s, this personal computer made a significant impact on the home computing landscape, appealing to hobbyists, educators, and early computer enthusiasts alike.

One of the standout features of the RS-4000 was its affordability, which made technology accessible to a broader audience. The computer was powered by a Zilog Z80 microprocessor, a popular choice at the time due to its reliable performance and efficiency. With a clock speed of 4 MHz, the RS-4000 provided basic computing capabilities that were sufficient for word processing, simple programming, and educational software.

The RS-4000 came with 64 KB of RAM, expandable up to 256 KB, allowing users to enhance the system’s performance as their needs grew. For data storage, the computer utilized an external cassette tape interface, which was a common method for saving and loading programs during that period. This tape system was ultimately replaced as technology progressed, but it represented a significant step forward in personal computing.

Another notable aspect of the Radio Shack RS-4000 was its comprehensive range of input and output options. The machine featured basic keyboard input, a built-in speaker for sound output, and compatibility with various peripherals, including printers and modems. Additionally, it provided both video output to standard television sets and the option for users to connect external monitors, bringing versatility to the display options.

The RS-4000 supported a variety of programming languages, including BASIC, which allowed users to delve into programming and develop their software applications. This capability contributed to the rise of a generation of computer coders and technology enthusiasts who would go on to shape the digital future.

In summary, the Radio Shack RS-4000 was more than just a computer; it was a catalyst for creativity and innovation during the formative years of personal computing. With its user-friendly design, expandability, and a growing library of software, the RS-4000 played a crucial role in helping individuals understand and embrace the digital age. Although technology has advanced significantly since its release, the legacy of the RS-4000 remains in the hearts of those who experienced it, marking a pivotal moment in the evolution of personal computers.