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BreadBin computer

After various experiments and failed attempts to design a 7400-based computer, I came to a quite minimalistic 8-bit approach which is nevertheless pretty versatile and can utilize a surprisingly large amount of memory resources. The CPU core itself executes its program from a static 64K flash memory and can access 32 bytes of internal RAM (which can be considered registers for all practical purposes). Access to the external memory area (up to 16MB of address space) allows addition of RAM, ROM and memory mapped IO. In the current setup this directly mirrors the capabilities of my OS816 reference design.”

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