mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 18:25:35 -04:00
Matthew Stanley
2767018b46
Root cause: BIOS pad handler polls I_STAT bit 7 waiting for SIO ACK IRQ. sio_tick() was only called from psx_check_interrupts and SIO register accesses, but I_STAT reads go through memory.c which never called sio_tick(). The IRQ countdown was stuck during the polling loop, causing the BIOS to time out and report "no pad found" (0xFF). Additionally, sio_tick() in psx_check_interrupts fired the IRQ too early — during BIOS delay loops BEFORE I_STAT bit 7 was cleared — so the BIOS cleared it and never saw it re-appear. Fixes: - memory.c: Call sio_tick() on I_STAT reads (32/16/8-bit paths) - interrupts.c: Remove sio_tick() from psx_check_interrupts - debug_server.c: Don't clear input override on TCP disconnect (was wiping override before next VBlank could read it) - debug_server.c: sio_state reports real pad_buttons via getter - sio.c/sio.h: Add sio_get_pad_buttons() for debug server - seeds: Add 20 new seeds for shell input and CARD driver functions Result: Pad buffer at 0x80083E30 shows status=0x00 (pad found), type=0x41 (digital), buttons reflect keyboard/override state. Only 5 COP2/GTE dispatch misses remain (Phase 5). Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
40 lines
1.0 KiB
C
40 lines
1.0 KiB
C
#ifndef PSXRECOMP_V4_SIO_H
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#define PSXRECOMP_V4_SIO_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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/* SIO0 register base: 0x1F801040 */
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#define SIO_BASE 0x1F801040
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void sio_init(void);
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/* MMIO read/write (0x1F801040-0x1F80104E) */
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uint32_t sio_read(uint32_t addr);
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void sio_write(uint32_t addr, uint32_t value);
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/* Advance SIO timing by one step. Called from psx_check_interrupts().
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* Fires pending IRQ7 after the transfer delay expires. */
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void sio_tick(void);
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/* Update pad button state. Buttons use PS1 convention: 0=pressed, 1=released.
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Bit layout: SELECT, L3, R3, START, UP, RIGHT, DOWN, LEFT,
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L2, R2, L1, R1, TRIANGLE, CIRCLE, CROSS, SQUARE */
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void sio_set_pad_state(uint16_t buttons);
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/* Connect a pad to a slot (0=port1, 1=port2). By default no pads are
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* connected during initial BIOS boot. */
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void sio_connect_pad(int slot);
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/* Return current pad button state (for debug server). */
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uint16_t sio_get_pad_buttons(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* PSXRECOMP_V4_SIO_H */
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