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Annotation of generator/main/gensoundi.c, revision 1.1

1.1     ! root        1: /* Generator is (c) James Ponder, 1997-2001 http://www.squish.net/generator/ */
        !             2: 
        !             3: #include "generator.h"
        !             4: #include "gensoundi.h"
        !             5: 
        !             6: #ifdef JFM
        !             7: #  include "jfm.h"
        !             8: #else
        !             9: #  include "support.h"
        !            10: #  include "fm.h"
        !            11: #endif
        !            12: 
        !            13: uint8 soundi_regs1[256];
        !            14: uint8 soundi_regs2[256];
        !            15: uint8 soundi_address1 = 0;
        !            16: uint8 soundi_address2 = 0;
        !            17: uint8 soundi_keys[8];
        !            18: 
        !            19: /*** soundi_ym2612fetch - fetch byte from ym2612 chip ***/
        !            20: 
        !            21: uint8 soundi_ym2612fetch(uint8 addr)
        !            22: {
        !            23: #ifdef JFM
        !            24:   return jfm_read(soundi_ctx, addr);
        !            25: #else
        !            26:   return YM2612Read(0, addr);
        !            27: #endif
        !            28: }
        !            29: 
        !            30: /*** soundi_ym2612store - store a byte to the ym2612 chip ***/
        !            31: 
        !            32: void soundi_ym2612store(uint8 addr, uint8 data)
        !            33: {
        !            34:   switch (addr) {
        !            35:   case 0:
        !            36:     soundi_address1 = data;
        !            37:     break;
        !            38:   case 1:
        !            39:     if (soundi_address1 == 0x28 && (data & 3) != 3)
        !            40:       soundi_keys[data & 7] = data >> 4;
        !            41:     if (soundi_address1 == 0x2a) {
        !            42:       soundi_keys[7] = 0;
        !            43:     }
        !            44:     if (soundi_address1 == 0x2b)
        !            45:       soundi_keys[7] = data & 0x80 ? 0xf : 0;
        !            46:     soundi_regs1[soundi_address1] = data;
        !            47:     break;
        !            48:   case 2:
        !            49:     soundi_address2 = data;
        !            50:     break;
        !            51:   case 3:
        !            52:     soundi_regs2[soundi_address2] = data;
        !            53:     break;
        !            54:   }
        !            55: #ifdef JFM
        !            56:   jfm_write(soundi_ctx, addr, data);
        !            57: #else
        !            58:   YM2612Write(0, addr, data);
        !            59: #endif
        !            60: }
        !            61: 

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