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/* |
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* main.cpp - SIDPlayer common routines |
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* |
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* SIDPlayer (C) Copyright 1996-2001 Christian Bauer |
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* SIDPlayer (C) Copyright 1996-2004 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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static bool psid_loaded = false; |
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// Data from PSID header |
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static uint16 init_adr; // C64 init routine address |
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uint16 play_adr; // C64 replay routine address |
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static uint32 speed_flags; // Speed flags (1 bit/song) |
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static uint16 init_adr; // C64 init routine address |
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uint16 play_adr; // C64 replay routine address |
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static bool play_adr_from_irq_vec; // Flag: dynamically update play_adr from IRQ vector ($0314/$0315 or $fffe/$ffff) |
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static uint32 speed_flags; // Speed flags (1 bit/song) |
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* Exit everything |
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*/ |
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void ExitAll(void) |
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void ExitAll() |
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{ |
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CPUExit(); |
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SIDExit(); |
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init_adr = read_psid_16(header, PSID_INIT); |
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play_adr = read_psid_16(header, PSID_MAIN); |
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play_adr_from_irq_vec = (play_adr == 0); |
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speed_flags = read_psid_32(header, PSID_SPEED); |
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// Select default song |
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SelectSong(current_song); |
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// Set replay routine address if not given in header |
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if (play_adr == 0) { // Replay routine address is given by interrupt vector |
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if (ram[1] & 2) // Kernal ROM switched in |
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play_adr = (ram[0x0315] << 8) | ram[0x0314]; |
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else // Kernal ROM switched out |
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play_adr = (ram[0xffff] << 8) | ram[0xfffe]; |
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} |
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// Everything OK |
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psid_loaded = true; |
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return true; |
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* PSID file loaded and ready? |
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*/ |
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bool IsPSIDLoaded(void) |
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bool IsPSIDLoaded() |
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{ |
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return psid_loaded; |
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} |
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// Execute init routine |
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CPUExecute(init_adr, current_song, 0, 0, 1000000); |
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} |
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/* |
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* Update play_adr from IRQ vector if necessary |
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*/ |
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void UpdatePlayAdr() |
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{ |
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if (play_adr_from_irq_vec) { |
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if (ram[1] & 2) // Kernal ROM switched in |
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play_adr = (ram[0x0315] << 8) | ram[0x0314]; |
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else // Kernal ROM switched out |
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play_adr = (ram[0xffff] << 8) | ram[0xfffe]; |
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} |
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} |