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The final output from the BBC BASIC raytracer, at long last. The 40 microsecond active line used by the Electron is apparent; horizontal retrace is every 64 microseconds in PAL, and the active period is usually about 52 microseconds; the BBC uses an active line period that's a hair under 50 microseconds, while the Electron was designed to use a Synertek 6502A which is out of spec if halted for more than 40 microseconds.

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The final output from the BBC BASIC raytracer, at long last. The 40 microsecond active line used by the Electron is apparent; horizontal retrace is every 64 microseconds in PAL, and the active period is usually about 52 microseconds; the BBC uses an active line period that's a hair under 50 microseconds, while the Electron was designed to use a Synertek 6502A which is out of spec if halted for more than 40 microseconds.
https://media.mstdn.social/media_attachments/files/111/764/511/751/144/322/original/acaa0a6d50cb5dc7.png

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⚳ rapid unscheduled assembly ⚳ (coregaze@mstdn.social)'s status on Tuesday, 16-Jan-2024 16:49:09 JST ⚳ rapid unscheduled assembly ⚳

@donkeyblam @coprolite9000 @bbcmicrobot @arx
And that's a wrap!
It took about eight hours and 40 minutes.

In conversation about a year ago from mstdn.social permalink