Can anyone direct me to where the development process is explained for LCD/VFD electronic game emulation? I'm fascinated by this.
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I think what I'm super interested in knowing is if this is "emulation" in the traditional sense, ie. is there a CPU that's being emulated and a ROM of some sort that is being dumped and fed in? If so, how are you getting the ROM read? Thanks for any info!!
In all cases currently supported by MAME: Yes. Systems-on-a-chip (SoCs) are old hat these days, and probably most familiar to people through the Arduino and other dev boards, but they've existed since the late 70's, although they were called microcontrollers (MCUs) then.
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A wide variety of MCUs were used in seriously vintage LCD/VFD things: The NatSemi COP400 range, the TI TMS1xxx range (Speak 'n Spell, anyone?), Mitsubishi MELPS 4, AMI S2000, Rockwell PPS-4, Sharp SM5-series, and many others. For the most part, 4-bt architecture.
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Yes, 4-bit architecture: Register widths tended to be one nybble in width, getting paired together for bytewise operations. ROM sizes were on the order of 1-2 kilobytes, RAM usually between 64 and 128 nybbles.
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