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Some changes in ATAPI comms, nw

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This commit is contained in:
Angelo Salese 2013-08-23 14:51:44 +00:00
parent 97390fd4f2
commit 2398f5bbd4
1 changed files with 6 additions and 2 deletions
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8
src/mess/machine/dccons.c
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@ -418,6 +418,7 @@ READ32_MEMBER(dc_cons_state::dc_mess_gdrom_r)
else
{
printf("ATAPI: dropping DRQ\n");
//gdrom_set_status(ATAPI_STAT_DRQ,false);
//atapi_regs[ATAPI_REG_CMDSTATUS] = 0;
//atapi_regs[ATAPI_REG_INTREASON] = ATAPI_INTREASON_IO;
}
@ -428,11 +429,12 @@ READ32_MEMBER(dc_cons_state::dc_mess_gdrom_r)
gdrom_raise_irq();
}
if( atapi_data_ptr < atapi_data_len )
if( atapi_cdata_wait )
{
data = atapi_data[atapi_data_ptr++];
data |= ( atapi_data[atapi_data_ptr++] << 8 );
if( atapi_data_ptr >= atapi_data_len )
atapi_cdata_wait-=2;
if( atapi_cdata_wait == 0 )
{
// printf( "atapi_r: read all bytes\n" );
atapi_data_ptr = 0;
@ -509,6 +511,7 @@ WRITE32_MEMBER(dc_cons_state::dc_mess_gdrom_w )
// not sure here, but clear DRQ at least?
gdrom_set_status(ATAPI_STAT_DRQ,false);
printf("cdata wait status\n");
atapi_cdata_wait = 0;
}
}
else if ( atapi_data_ptr == 12 )
@ -572,6 +575,7 @@ WRITE32_MEMBER(dc_cons_state::dc_mess_gdrom_w )
switch( phase )
{
case SCSI_PHASE_DATAOUT:
case SCSI_PHASE_DATAIN:
atapi_cdata_wait = atapi_xferlen;
break;
}