RTCU IDE download

The RTCU IDE is a very comprehensive development environment
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Download from the developer's website

Alternative software

PIC Simulator IDE
PIC Simulator IDE
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8085 Simulator IDE
8085 Simulator IDE
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Programs the 8085 microprocessor and integrates various programming tools.

Z80 Simulator IDE
Z80 Simulator IDE
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Powerful emulator for the Z80 microprocessor.

AVR Simulator IDE
AVR Simulator IDE
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It supports microcontrollers from the Atmel megaAVR and tinyAVR architectures.

Silicon Laboratories IDE
Silicon Laboratories IDE
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This tool is a complete software that includes a project manager, source editor