30 Jan
2015
30 Jan
'15
2:30 a.m.
ok, now with my 'good' 11/34 board set (not the set with the mysterious
zero bug) installed, I re-ran xxdp against the rl02. I'm getting proper
prompts with the address and vectors supplied with non-zero numbers as
defaults. I just hit return like I had been doing with the 'zero-bug' cpu
boards and this time, the tests run, the drive blinks wildly like before,
and I get real results with real numbers filled in. I think this pretty
conclusively proves that there's something really weird (mysterious zero
bug) going on with my other board set.
On Thu, Jan 29, 2015 at 7:15 PM, Johnny Billquist <bqt at update.uu.se> wrote:
On 2015-01-29 20:14, Pete Turnbull wrote:
On 29/01/2015 18:32, Jacob Ritorto wrote:
I haven't seen any crash dumps either.
The default in XXDP for CSRs is very often zero, and I'm pretty sure it
Johnny, you're insisting that I put in the
real numbers for address
and csr
for testing the drive (for instance). I'm going to do that next, here.
But are you understanding that some of us think that the reason it
prompts
a zero default is that it's a manifestation of the zero bug and that the
real value *is* actually safe but hidden in memory? Did you see the
RSX-11M crash dump I posted in the other thread?
I didn't see a crash dump, but did you see what I posted yesterday?
is so in the RL02 diagnostics (I've ont
checked the listing for that
particular one, but I did look at some others that were more readily to
hand). So when it asked you for input and you just hit "return", you
really did tell it zero. Applying the principle of Occam's Razor, and
assuming the simplest solution is the correct one, you got a lot of
zeros back because it was accessing memory instead of the controller you
wanted.
It's hard to believe you have a CPU fault that consistently prints
numbers as zeros yet happily boots three different OSs. Still, I'll
change the tune if you re-run XXDP with sensible inputs.
Totally agree with that one.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol