Revert #327 interlaced row submission to restore retail BIOS boot - #336
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Matched Ape Escape retail SCPH1001 LLE builds identify 0661ce7 as the visible boot regression: parent 155e269 reaches game code, while 0661ce7 stalls near BIOS frame 375. Revert its four dependent follow-ups too; retain PR #326 readback bounds and PR #328 Vulkan aspect changes. The row-by-row raster dispatcher amplifies an existing malformed DMA list into massive GL work. Keep the broader CPU/DMA arbitration experiment separate for compatibility testing. Document attribution, validation, and the temporarily restored interlace limitation. Validation: full Ape target reaches title/menu and frame 11669 on retail LLE; OpenBIOS control reaches frame 3701. Eight focused tests pass; retained GL readback fixture passes 71 checks at both 1x and 4x after linking local SDL with iconv. Beads: beads-iisy; DMA follow-up: beads-eio.3.122.
This was referenced Sep 10, 2026
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Summary
Roll back PR #327's interlaced per-row primitive submission in commit 24c6c56. Keep PR #326's bounded GL readbacks and PR #328's Vulkan aspect-ratio fix intact.
Confirmed regression
Matched Ape Escape builds using identical generated game/BIOS code, SCPH1001.BIN, disc, config and OpenGL settings, with
PSX_BIOS_HLE=0:155e269b: boots into game code, normal close at frame 2192.0661ce77, first commit of Preserve interlaced fields when drawing GPU primitives #327: severe Sony BIOS stall around frames 375-376.39ebb06f): boots, normal close at frame 2652.421f58ec): reproduces the severe stall.Per-row backend submission/flushes amplify a pre-existing malformed DMA list into massive GL work. The broader CPU/DMA arbitration fix is intentionally separate because it needs Vampire Hunter D/Spot compatibility validation. This rollback restores the previous missing active-field preservation; a replacement needs bounded rendering cost and real retail BIOS boot coverage.
Validation
-liconvto its recorded link command; no fixture or renderer edits were needed.git diff --checkpasses. No BIOS binaries or generated code included.Detailed attribution and limitations:
docs/internal/RETAIL_BIOS_INTERLACE_ROLLBACK.md.