The 2026-06-27 MMIO entry in FAITHFUL_TIMING_PLAN.md says the 13 prior
loops were unchanged when mmio_timer and mmio_spu were added. icache_miss
was not: the two new loops sit before it and move its loop top from
0x80010144 to 0x80010170, so each of its two misses costs one cycle more
and it reads +16 on both backends (re-measured against live psx-beetle; the
cycle_testrom README already explains the shift). The entry now carries a
dated correction, and the beetle-macos.md intro no longer points readers
at +14 as the current value.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Boot anchors (reset, the kernel copy, the first A0/B0/C0 calls, the shell)
pass within the first frames, before a TCP cyc_watch arm can land, so a
native-vs-Beetle boot comparison could not be run from the tree.
psx-runtime (debug_server.c) and psx-beetle (beetle_main.cpp) now read
PSX_CYC_WATCH ("<pc>" or "<pc>-<end>" for region mode) and PSX_CYC_WATCH_N
(default 16) at start-up and arm the watch before the first guest
instruction. The native arm shares the TCP handler's code path
(cyc_watch_arm); psx-beetle calls beetle_cyc_watch_arm. With neither
variable set nothing changes. tools/cycle_compare.py --no-arm then reads
both rings.
PSX_BEETLE_UNPACED=1 skips psx-beetle's 59.94 Hz wall-clock pacing for
headless oracle runs. Guest timing is unaffected.
docs/beetle-macos.md step 7 documents the variables and the anchor-key
difference for BIOS copy windows declared dispatch_key = "rom": the shell
is keyed natively at its ROM address (OpenBIOS 0xBFC0A500, SCPH-1001
0xBFC18000) while Beetle sees 0x80030000. Checked on macOS: the documented
example records the OpenBIOS shell entry at 5,015,670 in Beetle, the value
of the #429 land gate, and the native watch arms from boot.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
beetle-linux.md told builders to re-land several Beetle hooks by hand
because they were never exported to docs/: the rtrace and IRQ callbacks,
the guest-cycle clock, PS_CDC::PSXRecomp_GetDecodeVolume and the CDC/DMA
IRQ peeks that beetle_libretro.cpp links against, plus the SPU event
calls and the per-instruction hook the real cyc_watch now needs. Ship
them, one patch per hook, all against the 5759277b base:
- beetle_rtrace_irq_hook.patch
- beetle_guest_cycles_hook.patch
- beetle_cdc_dma_peek_hook.patch
- beetle_spu_event_hook.patch
beetle_cdcmd_trace_hook.patch was generated from a tree that already had
the wtrace block, so applying it after the wtrace patch redefined the
wtrace globals and typedefs and needed a manual fix. It is now a diff on
top of the wtrace and SIO patches; the resulting tree is unchanged.
beetle-macos.md is the macOS recipe, verified from a fresh official
clone on Apple Silicon: `git apply` of all seven patches, the osx static
build, the psx-beetle configure on current master, OpenBIOS under the
retail file names (Beetle otherwise boots its own, different OpenBIOS),
headless runs through SDL's dummy driver, and ruler #2 as the check
before trusting a build. beetle-linux.md now uses the full patch set,
notes the current configure requirements and the headless option, and
gives psx-beetle's actual default port (4382).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Shokunin