Commodore PET 4000 Series: Difference between revisions
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}}The '''Commodore PET 4000 Series''' was introduced in 1980 as an evolution of the earlier PET 2001 and 3000 series. Designed for educational and business environments, the 4000 series featured improved hardware, expanded memory options, and the more advanced Commodore BASIC 4.0. | }}The '''Commodore PET 4000 Series''' was introduced in 1980 as an evolution of the earlier PET 2001 and 3000 series. Designed for educational and business environments, the 4000 series featured improved hardware, expanded memory options, and the more advanced Commodore BASIC 4.0. | ||
== | == Architecture and Processor == | ||
The CPU within the PET 4000 series is the '''MOS Technology 6502''', an 8-bit microprocessor operating at '''1 MHz'''. This processor was widely used in various Commodore systems, partly due to Commodore buying MOS. | |||
The systems came equipped with '''Commodore BASIC 4.0''' in ROM, offering enhanced disk operations and programming capabilities over previous BASIC versions. | The systems came equipped with '''Commodore BASIC 4.0''' in ROM, offering enhanced disk operations and programming capabilities over previous BASIC versions. | ||
== | == Storage and I/O == | ||
While the PET 4000 series did not include an internal cassette drive, it supported external storage options: | While the PET 4000 series did not include an internal cassette drive, it supported external storage options: | ||
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These interfaces provided flexibility in storage solutions, catering to various user needs. | These interfaces provided flexibility in storage solutions, catering to various user needs. | ||
== | == Video Hardware == | ||
The video system utilized a character-based display, presenting text in a '''40x25''' format on either a 9" or 12" monochrome CRT monitor. The display was driven by a character generator ROM, ensuring clear and consistent text output suitable for programming and data entry tasks. | The video system utilized a character-based display, presenting text in a '''40x25''' format on either a 9" or 12" monochrome CRT monitor. The display was driven by a character generator ROM, ensuring clear and consistent text output suitable for programming and data entry tasks. | ||
== | == General Maintenance == | ||
Over time, PET 4000 series computers may experience issues common to vintage electronics, such as: | Over time, PET 4000 series computers may experience issues common to vintage electronics, such as: | ||
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Regular maintenance, including capacitor replacement, keyboard cleaning, and CRT adjustments, can help preserve the functionality of these systems. | Regular maintenance, including capacitor replacement, keyboard cleaning, and CRT adjustments, can help preserve the functionality of these systems. | ||
== | == PCB Schematics & Service Guide == | ||
Detailed schematics and service manuals are available for those interested in in-depth technical information. | |||
=== 📷 Motherboard Images === | === 📷 Motherboard Images === | ||
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=== | === Resources === | ||
The following pages provide | The following pages provide PET 4000 technical documentation: | ||
* '''[[Commodore PET 4000 Series Logic Board Schematics]]''' | * '''[[Commodore PET 4000 Series Logic Board Schematics]]''' | ||
* '''[[Commodore PET 4000 Series Technical Manual]]''' | * '''[[Commodore PET 4000 Series Technical Manual]]''' | ||
== | == Common Issues & Troubleshooting == | ||
Common issues with the PET 4000 series include: | Common issues with the PET 4000 series include: | ||
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For detailed troubleshooting steps, refer to the [[Commodore PET 4000 Series Troubleshooting Guide]]. | For detailed troubleshooting steps, refer to the [[Commodore PET 4000 Series Troubleshooting Guide]]. | ||
== | == Capacitor Replacement == | ||
Replacing aged electrolytic capacitors is crucial for maintaining system stability. The [[Commodore PET 4000 Series Capacitor Replacement Guide]] offers a step-by-step process for identifying and replacing these components. | Replacing aged electrolytic capacitors is crucial for maintaining system stability. The [[Commodore PET 4000 Series Capacitor Replacement Guide]] offers a step-by-step process for identifying and replacing these components. | ||
== | == Gallery == | ||
<gallery mode="packed" heights="200"> | <gallery mode="packed" heights="200"> | ||
File:Commodore PET 4032 Front.jpg|Front view of a PET 4032 model | File:Commodore PET 4032 Front.jpg|Front view of a PET 4032 model | ||