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2019-06-04fix a problem with end. make uartputc() wait until h/w is ready.Robert Morris1-0/+3
2019-06-03console input and sbrkRobert Morris1-4/+8
2019-06-03xxRobert Morris1-3/+7
2019-06-03push/pop all registers when handling interrupt from kernelRobert Morris1-0/+2
2019-06-03takes one uart input interrupt, then panicsRobert Morris1-4/+15
2019-05-31fork/wait/exit workRobert Morris1-50/+24
2017-08-09Commit to running on an SMP (perhaps with only 1 core). Remove most codeFrans Kaashoek1-1/+0
from picirq.c and remove timer.c completely. Update runoff.list.
2016-09-11Replace I_BUSY with sleep locksFrans Kaashoek1-0/+1
2016-08-25Remove trailing white space with:Frans Kaashoek1-2/+2
for f in *.{h,c}; do sed -i .sed 's/[[:blank:]]*$//' $f; done (Thanks to Nicolás Wolovick)
2009-08-08shuffle and tweak for formatting.Russ Cox1-1/+2
pdf has very good page breaks now. would be a good copy for fall 2009.
2009-05-31tab policersc1-39/+39
2009-05-31Add serial port input/output.rsc1-0/+76
Delete parallel port output. Works well with qemu -nographic mode.