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@hiroshiyui hiroshiyui released this 11 Jun 10:44
· 77 commits to main since this release
v0.2.0
4d00b68

Milestone 9 (frontend OSD) is complete and Milestone 12 task #8 (the
per-access bus-timing model) landed; a chain of user-verified accuracy fixes
followed — VF2's "phantom ring-out" floor displacement, an audio-pacing
starvation, and a CD report-tearing bug found booting Panzer Dragoon Zwei.
Save states: format v8 (older states are rejected, not migrated).

Added

  • M9 complete — frontend OSD: a persisted config file
    ($XDG_CONFIG_HOME/5thplanet/jupiter.toml: scale, fullscreen, region,
    cartridge, keymap; CLI flag > config > autodetect), a Settings →
    Controller     screen with press-to-bind keyboard remapping (Reset Defaults
    included), and a Settings → BIOS screen that power-cycles into any
    sibling 512-KiB image, re-keying the save files.
  • Game-controller support: hot-plug SDL GameController (XInput/evdev)
    merged into the port-1 pad with a fixed Xbox-style mapping
    (A/B/C = X/A/B, X/Y/Z = Y/LB/RB, L/R = triggers, D-pad or left stick),
    plus controller navigation of the OSD.
  • M12 task #8 — per-access BSC bus-timing model (a faithful Mednafen
    port, implemented bus-side): CS0 as a 16-bit bus with per-transaction
    costs, CS3 SDRAM read/write with the array-busy window, cache-line fills
    as one burst (AccessKind::LineFill), the SH-2 write buffer, bus
    turnaround, A-bus cartridge cost from live ASR0, and a shared bus
    timestamp giving CPU↔CPU arbitration. The bios_boot golden was
    unchanged; the BGM-phase metric moved toward the reference.

Fixed

  • VDP2 rotation — the VF2 "phantom ring-out": in 640/704-dot hi-res
    modes the rotation layer renders at normal dot resolution (each rotation
    dot spans two display dots); ours stepped per display dot, compressing
    the floor 2× toward screen-left. Also a one-bit sign-mask typo that
    corrupted rotation viewpoint X values in [4096, 8191].
  • Audio pacing: the SCSP is fed the master's actual cycle advance (the
    batch-edge overshoot was silently dropped — fights starved the audio
    reserve and felt slowed), delivered in fixed 256-cycle chunks so the
    Timer-B rate stays locked to the reference (88.000 samples/tick); SCSP
    output is resampled when the audio device opens at a non-44.1 kHz rate.
  • CD-block report tearing: the periodic status report now holds until
    the host consumes it by reading CR4 (Mednafen's ResultsRead gate) —
    previously it recomposed per sector during playback and could tear a
    reader's CR1..CR4 sequence (found via Panzer Dragoon Zwei's BIOS
    disc-validity check).

Changed

  • Save-state format v6→v8 across the bus-timing, ResultsRead, and
    SCSP-feed changes; older states are rejected with a clear error.
  • Debug tooling: CD command-log ring widened to 8192 entries; the VF2
    PC-trace and disc-content probes are now CUE-parameterized.
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