BH%SU-AI@USC-ECL (04/02/83)
From: Brian Harvey <BH%SU-AI@USC-ECL> vmunix works fine with the TU78; it is only the standalone programs (the bootstrap, mkfs, and restor) which may give trouble. The reason is that there is a hardware bug in the TU78 which affects the done bit in the status register (polled by the standalone monitor) but not the done interrupt (used by the vmunix kernel). When Berkelely found out about this they started sending out tapes corrected to work on the TU78, but due to an administrative mixup there, some of the recent tapes are right and some are wrong, fairly randomly. If your tape doesn't work, (1) ask around among the 4.1 sites near you and borrow all their boot tapes; (2) call Berkeley and tell them to send you another one and make sure it has the TU78 fix.