From mboxrd@z Thu Jan  1 00:00:00 1970
From: chd_1@nktelco.net (Chuck Dickman)
Date: Tue, 06 Nov 2001 19:48:57 -0500
Subject: [pups] Trouble with 2.11BSD and CQD-220
References: <200111062050.fA6Koh627439@moe.2bsd.com>
Message-ID: <3BE884F9.9D4752A5@nktelco.net>

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