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for isochronous endpoints
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context
while endpoints != 0 are opend after the device descriptor has been
parsed and the endpoint properties like maxpkt have been set, the
control endpoint is opend with a guessed maxpkt value. once the first
8 bytes of the descriptor have been read by usbd, maxpkt gets set and
we need to reevaluate the control endpoint 0 context to update the value.
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printing. simplify endpoint slot initialization.
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controllers and printing
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instead of guessing where the controllers dequeue pointer went,
stop the endpoint and then explicitely set te dequeue pointer to
the next write td position. that way we do not need to fix the cycle
bit in the td's and dont need to rely on if the controller
advanced the dequeue pointer after a stall or not.
add ctx and slot back pointers to ring.
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mapped)
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mechanism to pass arguments to /boot/boot
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when multiple upas/fs instances are running on the same index,
another upas/fs could have written the index, but we still want
to plumb the message.
so we introduce another cstate flag "Cnew" that is set when a
message that we havnt seen before by rdidx().
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up linux gdt code
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linear framebuffer, tell openbsd about framebuffer
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word writes; support sending virtio ethernet packets to a file and prepending snoopy headers
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