Tweak the viper control register:

- do not enable EISA bus grant until we really attach eisa devices;
- on some machines, booting from disk would hang in either "mem0" or "cpu0"
  probe. Tinkering eventually pointed out that setting a non-zero non-rachitic
  value for the viper's bus error timeout would help.

Right now, this kluge will only be enabled by default on a known list of
affected machines (which may grow over time...), and device attachment flags
allow users to try the other behaviour if necessary.

Discussed and crafted with mickey@, "it's gross" deraadt@

0 files changed, 0 insertions, 0 deletions