Hi
Combining what Steven and Tom have said and looking at ra.c
in standalone, I think I have a working version of rauboot now.
rauboot set the bit to cause an interrupt on ring transitions,
and then looped on the interrupt flag of the command and
response packets. I guess since CQD-220 was not completely set
up for interrupts, it would never set these flags.
pdpstand/ra.c did not set the interrupt on ring transitions bit,
and instead looped on the packet ownership bits. The CQD-220
seems to handle these bits as the standalone code expects.
Here are the changes that I made to rauboot.s.
Chuck
[Steven, Let me know if you want me to send you more than
this.]
------------------------cut here----------------------
*** rauboot.s.orig Wed May 31 22:54:49 1995
--- rauboot.s Mon Nov 5 19:21:26 2001
***************
*** 16,22 ****
MSCPSIZE = 64. / One MSCP command packet is 64bytes long (need
2)
! RASEMAP = 140000 / RA controller owner semaphore
RAERR = 100000 / error bit
RASTEP1 = 04000 / step1 has started
--- 16,23 ----
MSCPSIZE = 64. / One MSCP command packet is 64bytes long (need
2)
! /RASEMAP = 140000 / RA controller owner semaphore and _interrupt_
! RASEMAP = 100000 / RA controller owner semaphore
RAERR = 100000 / error bit
RASTEP1 = 04000 / step1 has started
***************
*** 287,304 ****
mov $RASEMAP,*$ra+RARSPH / set mscp semaphores
mov $RASEMAP,*$ra+RACMDH
mov *raip,r0 / tap controllers shoulder
! mov $ra+RACMDI,r0
1:
tst (r0)
! beq 1b / Wait till command read
! clr (r0)+ / Tell controller we saw it, ok.
2:
tst (r0)
! beq 2b / Wait till response written
clr (r0) / Tell controller we go it
rts pc
! icons: RAERR
ra+RARING
0
RAGO
--- 288,308 ----
mov $RASEMAP,*$ra+RARSPH / set mscp semaphores
mov $RASEMAP,*$ra+RACMDH
mov *raip,r0 / tap controllers shoulder
! mov $ra+RACMDH,r0
1:
tst (r0)
! bmi 1b / Wait till command read
! / clr (r0)+ / Tell controller we saw it, ok.
! mov $ra+RARSPH,r0
2:
tst (r0)
! bmi 2b / Wait till response written
! mov $ra+RACMDI,r0
! clr (r0)+ / Tell controller we saw it, ok.
clr (r0) / Tell controller we go it
rts pc
! icons: RAERR + 033
ra+RARING
0
RAGO