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Don't use mem_mask as ATA doesn't have an equivalent mechanism for byte accesses and it could mask out data that real hardware would keep. Instead fix issue with 68000 byte writes to sector count by only taking the bottom 8 bits from the bus. [smf]

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smf- 2016-12-01 14:43:05 +00:00
parent de89444efb
commit f43b81317e
1 changed files with 1 additions and 7 deletions
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8
src/devices/machine/atahle.cpp
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@ -813,9 +813,6 @@ WRITE16_MEMBER( ata_hle_device::write_cs0 )
LOG(("%s:IDE cs0 write to %X = %08X, mem_mask=%d\n", machine().describe_context(), offset, data, mem_mask));
// fprintf(stderr, "ide write %03x %02x mem_mask=%d\n", offset, data, size);
// apply mask
data &= mem_mask;
if (m_dmack)
{
logerror( "%s: %s dev %d write_cs0 %04x %04x %04x ignored (DMACK)\n", machine().describe_context(), tag(), dev(), offset, data, mem_mask );
@ -855,7 +852,7 @@ WRITE16_MEMBER( ata_hle_device::write_cs0 )
/* sector count */
case IDE_CS0_SECTOR_COUNT_RW:
m_sector_count = data ? data : 256;
m_sector_count = (data & 0xff) ? (data & 0xff) : 0x100;
break;
/* current sector */
@ -923,9 +920,6 @@ WRITE16_MEMBER( ata_hle_device::write_cs1 )
/* logit */
LOG(("%s:IDE cs1 write to %X = %08X, mem_mask=%d\n", machine().describe_context(), offset, data, mem_mask));
// apply mask
data &= mem_mask;
if (m_dmack)
{
logerror( "%s: %s dev %d write_cs1 %04x %04x %04x ignored (DMACK)\n", machine().describe_context(), tag(), dev(), offset, data, mem_mask );