/* $NetBSD: ym2149reg.h,v 1.7 2009/10/20 19:10:11 snj Exp $ */ /* * Copyright (c) 1996 Leo Weppelman. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef _YM2149REG_H #define _YM2149REG_H /* * Yahama YM-2149 Programmable Sound Generator */ #define YM2149 ((struct ym2149 *)AD_SOUND) struct ym2149 { volatile u_char sdb[4]; /* use only the even bytes */ }; #define sd_selr sdb[0] /* select register */ #define sd_rdat sdb[0] /* read register data */ #define sd_wdat sdb[2] /* write register data */ /* * Accessing the YM-2149 registers is indirect through ST-specific * circuitry by writing the register number into sd_selr. */ #define YM_PA0 0 /* Period Channel A, bits 0-7 */ #define YM_PA1 1 /* Period Channel A, bits 8-11 */ #define YM_PB0 2 /* Period Channel B, bits 0-7 */ #define YM_PB1 3 /* Period Channel B, bits 8-11 */ #define YM_PC0 4 /* Period Channel C, bits 0-7 */ #define YM_PC1 5 /* Period Channel C, bits 8-11 */ #define YM_PNG 6 /* Period Noise Generator, bits 0-4 */ #define YM_MFR 7 /* Multi Function Register */ #define YM_VA 8 /* Volume Channel A */ #define YM_VB 9 /* Volume Channel B */ #define YM_VC 10 /* Volume Channel C */ #define YM_PE0 11 /* Period Envelope, bits 0-7 */ #define YM_PE1 12 /* Period Envelope, bits 8-15 */ #define YM_WFE 13 /* Wave Form Envelope */ #define YM_IOA 14 /* I/O port A */ #define YM_IOB 15 /* I/O port B */ /* bits in MFR: */ #define SA_OFF 0x01 /* Sound Channel A off */ #define SB_OFF 0x02 /* Sound Channel B off */ #define SC_OFF 0x04 /* Sound Channel C off */ #define NA_OFF 0x08 /* Noise Channel A off */ #define NB_OFF 0x10 /* Noise Channel B off */ #define NC_OFF 0x20 /* Noise Channel C off */ #define PA_OUT 0x40 /* Port A for Output */ #define PB_OUT 0x80 /* Port B for Output */ /* bits in Vx: */ #define VOLUME 0x0F /* 16 steps */ #define ENVELOP 0x10 /* volume steered by envelope */ /* bits in WFE: */ #define WF_HOLD 0x01 /* hold after one period */ #define WF_ALTERNAT 0x02 /* up and down (no saw teeth) */ #define WF_ATTACK 0x04 /* start up */ #define WF_CONTINUE 0x08 /* multiple periods */ /* names for bits in Port A (ST specific): */ #define PA_SIDEB 0x01 /* select floppy head - if double sided */ #define PA_FLOP0 0x02 /* Drive Select Floppy 0 */ #define PA_FLOP1 0x04 /* Drive Select Floppy 1 */ #define PA_FDSEL (PA_SIDEB|PA_FLOP0|PA_FLOP1) #define PA_SRTS 0x08 /* Serial RTS */ #define PA_SDTR 0x10 /* Serial DTR */ #define PA_PSTROBE 0x20 /* Parallel Strobe */ #define PA_USER 0x40 /* Free Pin on Monitor Connector */ #define PA_SER2 0x80 /* Choose between LAN or Ser2 port */ /* * Access macro's for Port A * Port A is defined as an output port. Reading the port does not work * reliably so keeping a 'soft-copy' seems to be the only way to make * things work. */ extern u_char ym2149_ioa; /* Soft-copy of port-A */ #define ym2149_write_ioport(port, value) { \ int _os = splhigh(); \ \ YM2149->sd_selr = port; \ YM2149->sd_wdat = value; \ splx(_os); \ } #define ym2149_write_ioport2(port, value) { \ YM2149->sd_selr = port; \ YM2149->sd_wdat = value; \ } #define ym2149_fd_select(select) { \ int _s = splhigh(); \ \ ym2149_ioa = (ym2149_ioa & ~PA_FDSEL) | (select & PA_FDSEL); \ ym2149_write_ioport(YM_IOA, ym2149_ioa); \ splx(_s); \ } #define ym2149_rts(set) { \ int _s = splhigh(); \ \ ym2149_ioa = set ? ym2149_ioa | PA_SRTS : ym2149_ioa & ~PA_SRTS;\ ym2149_write_ioport(YM_IOA, ym2149_ioa); \ splx(_s); \ } #define ym2149_dtr(set) { \ int _s = splhigh(); \ \ ym2149_ioa = set ? ym2149_ioa | PA_SDTR : ym2149_ioa & ~PA_SDTR;\ ym2149_write_ioport(YM_IOA, ym2149_ioa); \ splx(_s); \ } #define ym2149_strobe(set) { \ int _s = splhigh(); \ \ ym2149_ioa = set ? ym2149_ioa | PA_PSTROBE : ym2149_ioa & ~PA_PSTROBE;\ ym2149_write_ioport(YM_IOA, ym2149_ioa); \ splx(_s); \ } #define ym2149_ser2(set) { \ int _s = splhigh(); \ \ ym2149_ioa = set ? ym2149_ioa | PA_SER2 : ym2149_ioa & ~PA_SER2;\ ym2149_write_ioport(YM_IOA, ym2149_ioa); \ splx(_s); \ } #undef ym2149_write_ioport2 #ifdef _KERNEL /* * Prototypes */ void ym2149_init(void); #endif #endif /* _YM2149REG_H */
