As I said, this time the design notes were extensive since I wanted this emulator to be specifically designed for embedded systems, so only 48k emulation, optional framebuffer rendering, very little additional memory used (no big lookup tables for ULA/Z80 access contention), ROM not copied in the RAM to avoid using additional 16k of memory, but just referenced during the initialization (so we have just a copy in the executable), and so forth.
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，这一点在heLLoword翻译官方下载中也有详细论述
最让任涛难忘的，还是10多年前一家跨国企业在中卫选点时的情景。“他们在国内选了30多个城市，提出了280多项指标，看到中卫跟其总部所在地的地形、地貌、环境都非常相似，最终选择落地。”任涛回忆。
Snapshot of all tracks
Classic arcade CRTs are quite different from modern VGA monitors. Standard VGA runs at 31.5kHz horizontal sync, meaning it draws 31,500 lines per second. Arcade monitors run at 15.7kHz, roughly half that rate. So unfortunately you can’t just plug a VGA cable into an arcade monitor: the monitor’s horizontal deflection circuitry physically cannot sweep the electron beam fast enough.