3c5f553e65
z8530sc.c: Check pending interrupts in a loop until all requests are handled. The old comments said it would cause horrible latency to sun3x floppy etc, but serial ports should have higher priority than disks anyway. z8530tty.c: Don't enable and disable TX interrupts on each transmit start and completion because it could cause possible race conditions. Instead, set ZSWR0_RESET_TXINT on each TIE interrupt to clear the request as other kbd drivers attached at zs(4). Tested on cobalt, macppc, news68k, sparc, and sun3.