Drop-in Vintage CPU Replacements with the tranZPUter Project
The TranZPUter project has developed drop-in replacements for vintage computer CPUs, including the Motorola 6809, using modern RP2350B MCUs with additional features.
One of the struggles with vintage computer systems is that many of the integrated circuits have no modern-day equivalent available for purchase. The TranZPUter project addresses this challenge by creating replacements using contemporary components.
Motorola 6809 Replacement
Among these, the Motorola 6809 is an 8-bit microprocessor with some 16-bit features that outperformed the 6502 in many metrics. Launched in 1978, it was more expensive and thus used in systems like the TRS-80 Color, Dragon 32/64, SuperPET, and various arcade machines. The Pico6809 board features the RP2350B MCU and an ESP32 co-processor.
Enhanced Capabilities
Currently targeting Dragon 32/64 systems, the Pico6809 board not only replaces a failed MPU but also adds virtual floppy and cassette devices plus network support options. This comprehensive approach has likely gained popularity within the retrocomputing community, preserving and enhancing classic computer systems with modern functionality.
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