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Continue DMA requests if writing, even after a phase mismatch.

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This commit is contained in:
Thomas Harte
2022-09-15 16:46:22 -04:00
parent c4091a4cdb
commit fea8fecf11
1 changed files with 6 additions and 2 deletions
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8
Components/5380/ncr5380.cpp
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@@ -314,8 +314,12 @@ void NCR5380::scsi_bus_did_change(SCSI::Bus *, SCSI::BusState new_state, double
break; break;
case SCSI::Line::Request: case SCSI::Line::Request:
// Don't issue a new DMA request if a phase mismatch has // Don't issue a new DMA request if a phase mismatch has
// been detected. This is a bit of reading between the lines. // been detected and this is an intiator receiving.
dma_request_ = !phase_mismatch_; // This is a bit of reading between the lines.
// (i.e. guesswork, partly)
dma_request_ =
!phase_mismatch_ ||
(dma_operation_ != DMAOperation::InitiatorReceive);
break; break;
case SCSI::Line::Request | SCSI::Line::Acknowledge: case SCSI::Line::Request | SCSI::Line::Acknowledge:
dma_request_ = false; dma_request_ = false;