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simh.simh/SDS/sds_io.c
Mark Emmer 7dfc409da3 SDS: Fix intermittent I/O data errors when two or more I/O channels active
When reading from paper tape on the W channel and writing the drum on the E channel, intermittent errors and premature end-of-record were observed. The TST_XFR macro was failing to properly quality that a data character was available for a particular device and channel. Thus, a data ready condition for the drum would cause a bad transfer for another active device on a different channel.
2015-01-19 19:29:28 -06:00

41 KiB