CydandClaude Fable 5
72da9b2f14
VGL_LABS cockpit test suite as pod-launch 'test' mode The WC hang, root-caused in three layers (each necessary): 1. WC was rendered-samples + 100ms-capped interpolation; AWEUTIL's poll storm (~550k port-ops/s) starved the render thread of awe_lock, so the clock crawled ~90x slow. Fixed: free-running host-clock derivation + a fairness gate so the render thread can always take the lock. 2. Free-running at true 44.1kHz still failed: trapped port reads cost ~30us -- MORE than one 22.7us tick -- so consecutive reads skipped counter values, and AWEUTIL's WaitUntilWC (decoded at COM offset 0x5F42) exits only on EQUALITY with a target tick: skipped value = missed target = 1.49s wrap penalty, or forever. 3. Advancing +1 per read still failed: WaitUntilWC reads WC TWICE per iteration, so its equality sample saw only every 2nd value -- wrong parity = infinite loop. Final semantics: during a poll storm the counter advances once per FOUR reads (every value observable by all of AWEUTIL's loop shapes; its 8192-unchanged-reads dead-clock bailout never trips), and resyncs to true wall time after any 50ms idle gap. Result: the full stock TEST.BAT (DIAGNOSE + AWEUTIL /S on both cards) completes in seconds. Also: pod-launch 'test' mode -> vwetest.conf (stock TEST.BAT -> TSTALL), DOSBox window defaults to 900,600 in test mode (the DOS screen is the suite's UI), VWE_AWE_LOG gains storm bursts with guest cs:ip + caller and rare-read tracing (the instrumentation that cracked this). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
51 lines
2.2 KiB
C
51 lines
2.2 KiB
C
/* Minimal 86Box environment shim for the vendored EMU8000 core (emu8k.cpp).
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* Supplies exactly what snd_emu8k.c pulled from 86Box headers:
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* - io_sethandler/io_removehandler (implemented in vweawe.cpp on top of
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* DOSBox-X IO_Register*Handler, with the 86Box handler signatures)
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* - wavetable_pos_global (the render-target sample clock; vweawe.cpp sets
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* it per mixer block instead of 86Box's per-frame sound clock)
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* - pclog/pclog_ex/fatal logging and the UNUSED() parameter marker
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* - emu8k_shim_rom_fopen(): optional AWE32 GM ROM via $VWE_AWE_ROM
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*/
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#ifndef VWE_EMU8K_SHIM_H
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#define VWE_EMU8K_SHIM_H
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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/* 86Box io.h handler signatures (priv-pointer style) */
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typedef uint8_t (*emu8k_io_inb_t)(uint16_t addr, void *priv);
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typedef uint16_t (*emu8k_io_inw_t)(uint16_t addr, void *priv);
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typedef uint32_t (*emu8k_io_inl_t)(uint16_t addr, void *priv);
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typedef void (*emu8k_io_outb_t)(uint16_t addr, uint8_t val, void *priv);
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typedef void (*emu8k_io_outw_t)(uint16_t addr, uint16_t val, void *priv);
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typedef void (*emu8k_io_outl_t)(uint16_t addr, uint32_t val, void *priv);
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void io_sethandler(uint16_t base, int size,
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emu8k_io_inb_t inb, emu8k_io_inw_t inw, emu8k_io_inl_t inl,
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emu8k_io_outb_t outb, emu8k_io_outw_t outw,
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emu8k_io_outl_t outl, void *priv);
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void io_removehandler(uint16_t base, int size,
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emu8k_io_inb_t inb, emu8k_io_inw_t inw,
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emu8k_io_inl_t inl, emu8k_io_outb_t outb,
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emu8k_io_outw_t outw, emu8k_io_outl_t outl, void *priv);
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/* render-target sample position for emu8k_update() (86Box sound.h) */
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extern int wavetable_pos_global;
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FILE *emu8k_shim_rom_fopen(void);
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/* the WC sample counter readback: free-running 44100Hz off the host clock,
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* exactly like the silicon (guest software busy-waits on it; deriving it
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* from render progress made those waits crawl under lock contention) */
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uint16_t emu8k_shim_wc_read(void);
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#define pclog(...) fprintf(stderr, __VA_ARGS__)
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#define pclog_ex(fmt, ap) vfprintf(stderr, fmt, ap)
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#define fatal(...) fprintf(stderr, __VA_ARGS__)
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#define UNUSED(arg) arg
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#endif
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