A home-brew computer design
originally fabricated into a Xilinx FPGA
on a Digilent Nexys-2 development board.
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16-bit S16X4A stack-architecture processor core.
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48KB of RAM
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32KB of instruction/data RAM
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16KB of monochrome frame buffer RAM
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25MHz clock, giving a top speed of 20 MIPS.
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Far and away my most successful home-brew computer design, lasting many years.
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Ironically, not enough RAM to hold even moderately complex software.
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First platform to host the STS (Single Tasking System) operating system, a CP/M-inspired CLI based environment.
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First time working with native MMC/SD-cards for mass storage.
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Last time working with native MMC/SD-cards for mass storage. :-)
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Progenitor of two successor designs.