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Peter YooandClaude Fable 5.1
5fd71e8312
tvp_source_setup() disables the TVP7002 internal H-PLL coast for every PC-type preset. That is right for RGBHV, but with sync-on-green or composite sync the serration pulses during vsync disturb the H-PLL every frame; on a NeXTstation Color (1120x832, SoG) this caused continuous horizontal jitter, jitter in the top third of the picture and a periodic HDMI re-sync. With the option on, coast is re-enabled after setup when the sync source is SOG or CSYNC; RGBHV is untouched. Default Off, so existing behaviour is unchanged. Stored as profile item id 68. On the NeXT, this option together with the existing settings Analog sync LPF = 10 MHz, ADC PLL BW = Low and H-PLL Pre/Post-Coast = 4/4 ran 19 minutes without a sync loss, mode re-program or IT6613 video-stable change. SPARCstation 20 framebuffers (ZX, TurboGX) over composite sync are stable without it. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01WiXHy7Jhh5yTdsBaenucgw