mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-27 18:52:11 -04:00
Matthew Stanley
8b59da8202
Boot stays at authentic 1x. Speed switch fires once when the game's entry_pc is first dispatched — safely after the BIOS disc init and Sony/PlayStation logo sequences complete. Uses entry_pc exact-match rather than text range to avoid false-triggering on the BIOS shell (RAM 0x30000-0x5B000 overlaps the game text range). XA guard in apply_speed(): reverts to 1x whenever xa_stream_active, protecting FMV playback from speed-up regardless of disc_speed setting. CDROM_MIN_DELAY floor of 500 cycles prevents instant mode from firing IRQs faster than the interrupt handler can process them. Tomba game.toml: disc_speed = "4x" (instant proved too aggressive for early game disc reads; 4x safe with XA guard protecting FMVs). Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
#ifndef PSXRECOMP_CDROM_H
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#define PSXRECOMP_CDROM_H
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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void cdrom_init(const char* cue_path);
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/* Set disc speed multiplier immediately. divisor=0 → instant, 1 → 1x, 2 → 2x. */
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void cdrom_set_speed(int divisor);
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/* Store configured game speed (applied post-BIOS via cdrom_notify_game_started). */
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void cdrom_set_game_speed(int divisor);
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/* Called by fntrace on first game-range dispatch; switches to game speed. */
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void cdrom_notify_game_started(void);
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/* MMIO read/write (0x1F801800-0x1F801803) */
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uint32_t cdrom_read(uint32_t addr);
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void cdrom_write(uint32_t addr, uint32_t value);
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/* Advance CD-ROM state machine by guest CPU cycles. Sets i_stat IRQ_CDROM
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* when a command completes or data is ready. */
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void cdrom_advance(uint32_t cycles);
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/* Legacy frame-paced entry point for interpreter/oracle builds. */
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void cdrom_tick(void);
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/* DMA channel 3 interface */
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uint32_t cdrom_dma_read(void);
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int cdrom_dma_ready(void);
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typedef struct CDROMDebugState {
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uint64_t seq;
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uint8_t index_reg;
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uint8_t stat_reg;
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uint8_t irq_enable;
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uint8_t irq_flag;
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uint8_t mode_reg;
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uint8_t seek_min;
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uint8_t seek_sec;
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uint8_t seek_sect;
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uint8_t pending_cmd;
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int has_disc;
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int param_count;
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int response_read;
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int response_count;
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int sector_read_pos;
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int sector_available;
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int sector_size;
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int reading;
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int read_min;
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int read_sec;
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int read_sect;
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uint8_t read_cmd;
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uint8_t filter_file;
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uint8_t filter_channel;
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uint8_t muted;
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int read_delay;
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int pending_pending;
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int pending_delay;
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int pending_phase;
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uint32_t i_stat;
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} CDROMDebugState;
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typedef struct CDROMTraceEntry {
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uint64_t seq;
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uint32_t addr;
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uint32_t val;
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uint32_t func;
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uint32_t pc;
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uint32_t frame;
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uint32_t i_stat;
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uint8_t kind;
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uint8_t width;
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uint8_t index_reg;
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uint8_t stat_reg;
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uint8_t irq_enable;
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uint8_t irq_flag;
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uint8_t param_count;
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uint8_t response_read;
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uint8_t response_count;
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uint8_t sector_available;
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uint8_t mode_reg;
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uint8_t pending_cmd;
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uint8_t pending_pending;
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uint8_t reading;
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uint8_t read_cmd;
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int sector_read_pos;
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int sector_size;
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int pending_delay;
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int read_delay;
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} CDROMTraceEntry;
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#define CDROM_TRACE_CAP (1 << 16)
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void cdrom_debug_snapshot(CDROMDebugState* out);
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uint64_t cdrom_debug_get_trace(const CDROMTraceEntry** out_entries);
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void cdrom_debug_clear_trace(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* PSXRECOMP_CDROM_H */
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