6502/CLK
1
0
Fork 0
mirror of https://github.com/TomHarte/CLK.git synced 2025-02-16 18:30:32 +00:00
Code Issues Projects Releases Wiki Activity

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

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Components/5380/ncr5380.cpp
View File

@ -314,8 +314,12 @@ void NCR5380::scsi_bus_did_change(SCSI::Bus *, SCSI::BusState new_state, double
break;
case SCSI::Line::Request:
// Don't issue a new DMA request if a phase mismatch has
// been detected. This is a bit of reading between the lines.
dma_request_ = !phase_mismatch_;
// been detected and this is an intiator receiving.
// This is a bit of reading between the lines.
// (i.e. guesswork, partly)
dma_request_ =
!phase_mismatch_ ||
(dma_operation_ != DMAOperation::InitiatorReceive);
break;
case SCSI::Line::Request | SCSI::Line::Acknowledge:
dma_request_ = false;