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Document signals on PortA used for analog sound. (nw)

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couriersud 2015-06-08 00:07:12 +02:00
parent b31a147b80
commit 29b82e6ad3
1 changed files with 7 additions and 0 deletions
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7
src/mame/audio/irem.c
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@ -154,6 +154,13 @@ WRITE8_MEMBER( irem_audio_device::ay8910_0_portb_w )
WRITE8_MEMBER( irem_audio_device::ay8910_1_porta_w )
{
/*
* 45L 21 IOA0 ==> 8D
* 45L 20 IOA1 ==> SD
* 45L 19 IOA2 ==> OH
* 45L 18 IOA3 ==> CH
*
*/
#ifdef MAME_DEBUG
if (data & 0x0f) popmessage("analog sound %x",data&0x0f);
#endif