> On 2016-07-29, at 19:32, Jim Brain <brain@jbrain.com> wrote: > >> The two revisions of C64DTV prototypes were FPGA boards, but once the FPGA design was finalized, it was made into an ASIC for mass production. And yes, it was a single-chip re-implementation of the C64, so the VIC, SID, CIAs, 6510, etc. were all included in the single ASIC. > > The code was a mix of schematic capture, VHDL, and Verilog, as I recall, but the ASIC vendor could only convert CHDL to netlists. I seem to recall Jeri doing a lot of rewriting at the very end to get all of the project into VHDL so it could be converted to an ASIC. > > That said, the entire design was digital, so she managed to coax composite out of the digital pins. I suspect that some of the resistors on the PCB make up an R2R or similar. And - BTW - If I recall correctly the skewed PAL colours in the European model were due to incorrect resistors on the board. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2016-07-29 18:00:29
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