20200810: see 122. Updated Gray Counter for the rest of the story !I must make a Gray code counter ! It is not obvious why but it's an important piece of circuitry that is required by the debug/test port... Have a look there for some background :4. The...
3-11-2024 See these two 2011 Liliputing and TechCrunch articles, which were partly the inspiration for this project: https://liliputing.com/pixel-qi-suggests-low-power-tablets-could-be-powered-by-1w-solar-panels/(6-3-11) https://techcrunch.com/2011/06/04/first-solar-powered-laptop/ (6-4-11)...
This represents a complete OPCODE list with 14 Constants (int values) available and 10 Labels (byte values) available for creating subroutines. Constants were favored over Labels, but this is up for evaluation. NOP and HCF were both added to the official...
I might be missing a few connections yet which I'll correct as I come across them, but here is the pinout of the XC3S250E FPGA on the control board. Note that the SRAM and the Flash share an interface bus. Also note that the JTAG interface...