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Trailing-Edge - PDP-10 Archives - bb-ee87a-sb - 10,7/doc/v1515.bwr
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BEWARE FILE FOR RSX-20F V15-15:



1) INSTALLATION

Follow the procedure for building the front-end file system outlined in the
appropriate software installation guide for your system (TOPS-10 Software
Installation Guide, chapter 6; or TOPS-20 KL Model B Installation Guide,
chapter 4).  

TOPS-10 customers with DECtapes will notice that three tapes have been supplied
rather than two.  Tape 'C' may be copied to the disk structure after finishing
tapes 'A' and 'B', and running SAV, as outlined in section 6.1.1 of the TOPS-10
Software Installation Guide.  To install tape 'C', use the following procedure:
	1) Remove the tape from drive 0 and mount Dectape 'C'.
	2) Type a control-\ on the CTY to invoke the parser:
	PAR%MCR MOU <return>
	MOU>DT0: <return>
	MOU -- MOUNT COMPLETE
	MOU><control-Z>

	<control-\>

	PAR%MCR PIP <return>
	PIP>DB0:=DT0: <return>
	PIP>TT:=DB0:/LI <return>
	PIP><control-Z>

	<control-\>

	PAR%MCR DMO <return>
	DMO>DT0: <return>
	DMO -- DISMOUNT COMPLETE
	DMO><control-Z>

At this point you can boot the system from disk as described in section 6.1.3.





2) CHANGE TO KLI DIALOG

	An additional question has been added to the KLI dialog relating to 
the MCA25 Cache Page Table. This question will only appear if the MCA25 is
present.  The MCA25 is divided into two parts which may be used either
selectively or together.  Normally one should use both, but for maintenance
purposes either half may be used exclusively.  An example of the new KLI
dialog follows:



Sample TOPS-10 dialog:


RSX-20F VE15-15 17:00 17-SEP-84

[SY0: redirected to DB0:]
[DB0: mounted]
KLI -- VERSION VA15-15 RUNNING
KLI -- ENTER DIALOG [NO,YES,EXIT,BOOT]?
KLI>YES
KLI -- KL10 S/N: 2476., MODEL B, 60 HERTZ
KLI -- KL10 HARDWARE ENVIRONMENT:
	MCA25 CACHE PAGER UPGRADE
	MOS MASTER OSCILLATOR
	EXTENDED ADDRESSING
	INTERNAL CHANNELS
	CACHE

KLI -- SELECT PAGE TABLE [FILE,BOTH,0,1]?
KLI>BOTH
KLI -- PAGE TABLE SELECTED: BOTH
KLI -- RELOAD MICROCODE [YES,VERIFY,FIX,NO]?
KLI>YES KLX.MCB
KLI -- MICROCODE VERSION 2.0[400] LOADED
KLI -- RECONFIGURE CACHE [FILE,ALL,REVERSE,YES,NO]?
KLI>ALL
KLI -- ALL CACHE ENABLED
KLI -- CONFIGURE KL MEMORY [FILE,ALL,REVERSE,YES,NO]?
KLI>ALL

LOGICAL MEMORY CONFIGURATION.
  ADDRESS  SIZE  INT  TYPE CONTROLLER
 00000000  768K   4   MF20  10

KLI -- LOAD KL BOOTSTRAP [FILE,YES,NO,FILENAME]?
KLI>
KLI -- WRITE CONFIGURATION FILE [YES,NO]?
KLI>
KLI -- CONFIGURATION FILE WRITTEN
KLI -- BOOTSTRAP LOADED AND STARTED

BOOT V2(17)

BOOT>




Sample TOP-20 dialog:

RSX-20F VB15-15 17:00 17-SEP-84

[SY0: redirected to DB0:]
[DB0: mounted]
KLI -- VERSION VB15-15 RUNNING
KLI -- ENTER DIALOG [NO,YES,EXIT,BOOT]?
KLI>YES
KLI -- KL10 S/N: 2476., MODEL B, 60 HERTZ
KLI -- KL10 HARDWARE ENVIRONMENT:
	MCA25 CACHE PAGER UPGRADE
	MOS MASTER OSCILLATOR
	EXTENDED ADDRESSING
	INTERNAL CHANNELS
	CACHE

KLI -- SELECT PAGE TABLE [FILE,BOTH,0,1]?
KLI>BOTH
KLI -- PAGE TABLE SELECTED: BOTH
KLI -- RELOAD MICROCODE [YES,VERIFY,FIX,NO]?
KLI>YES
KLI -- MICROCODE VERSION 1.0[357] LOADED
KLI -- RECONFIGURE CACHE [FILE,ALL,REVERSE,YES,NO]?
KLI>ALL
KLI -- ALL CACHE ENABLED
KLI -- CONFIGURE KL MEMORY [FILE,ALL,REVERSE,YES,NO]?
KLI>ALL

LOGICAL MEMORY CONFIGURATION.
  ADDRESS  SIZE  INT  TYPE CONTROLLER
 00000000  768K   4   MF20  10

KLI -- LOAD KL BOOTSTRAP [FILE,YES,NO,FILENAME]?
KLI>
KLI -- WRITE CONFIGURATION FILE [YES,NO]?
KLI>
KLI -- CONFIGURATION FILE WRITTEN
KLI -- BOOTSTRAP LOADED AND STARTED

BOOT V10.0(152)

BOOT>





3) TEMPORARY PATCHES FOR AUTOBAUD PROBLEM

We have changed the autobaud algorithm which appeared in version 14-45 of 
RSX-20F to include support for speeds up to 9600 baud.  Unfortunately, in 
so doing we have found that in some instances the front end will incorrectly
determine the speed of an autobaud line.  Rather than hold up the release of
version 15-15 of RSX-20F, we have decided to ship 15-15 unpatched, and list
here two patches which should help to alleviate the problem.  These patches
need only be applied if your users experience autobaud problems.  Moreover,
already built into version 15-15 is a new feature whereby if a user does get
set to the wrong speed (indicated by garbage appearing on the screen), he/she
can type two consecutive break characters in order to reenter autobaud detect.
We are continuing to investigate this problem, and when a final resolution is
determined, the following patches will become unsupported.  Also, please note
that patch B has the side effect of dropping autobaud support for devices at 
150 baud. If you need support for autobaud at 150 baud, do not apply patch B.



The following patch is edit A to RSX20F V15-15.

To apply this patch do the following:

1) Shut down the system by typing the following:

^\		! Control-\ to invoke the PARSER

PAR>SHUT	! Causes TOPS-10/20 to stop running

2) Now reboot the Console Front End by setting the switches on

   the PDP-11 to 203 (switches 0,1, and 7 up, others down) and

   pressing the ENABLE and SWITCHES load switches on the KL10

   front panel.

3) Type ^\ (Control-\) to invoke the PARSER

4) In response to the PAR> prompt type the following (text 
   beginning with an exclamation mark or semicolon is a comment
   and need not be typed on the console terminal):

SET CONSOLE MAINTENANCE 

SET MEMORY ELEVEN


!	.PAT2.:	MOV	STSW0(R5),-(SP)		; FETCH CURRENT SPEED
DEPOSIT 120=16546
DEPOSIT NEXT=4

!		BIC	#S0.MSK,(SP)		; DROP FLAGS
DEPOSIT NEXT=42716
DEPOSIT NEXT=140000

!		CMP	R3,(SP)+		; DO SPEEDS MATCH?
DEPOSIT NEXT=20326

!		BEQ	10$			; YES -- GO ON
DEPOSIT NEXT=1407

!		BIC	#^C<S0.MSK>,STSW0(R5)	; NO -- FLUSH OLD SPEED
DEPOSIT NEXT=42765
DEPOSIT NEXT=37777
DEPOSIT NEXT=4

!		BIS	R3,STSW0(R5)		; SAVE NEW SPEED
DEPOSIT NEXT=50365
DEPOSIT NEXT=4

!		JMP	TTINPB			; DISMISS AND WAIT FOR MORE
DEPOSIT NEXT=137
DEPOSIT NEXT=37060

!	10$:	BIC	#TT.ABW,STSW1(R5)	; TERMINATE AUTO BAUD WAIT
DEPOSIT NEXT=42765
DEPOSIT NEXT=10
DEPOSIT NEXT=6

!		CALL	.DHSPD			; SET SPEED
DEPOSIT NEXT=4737
DEPOSIT NEXT=40334

!		JMP	$DHINP+310		; RETURN FROM PATCH
DEPOSIT NEXT=137
DEPOSIT NEXT=36330

!
!		BIC	#TT.IGN,STSW1(R5)	; NEXT CHAR OK
DEPOSIT 36272=10000

!		JMP	.PAT2.			; ENTER PATCH
DEPOSIT 36324=137
DEPOSIT NEXT=120

!		.ASCII	/5A/			; CALL THIS EDIT A
DEPOSIT 1044=40465


SET CONSOLE OPERATOR

5) Now type "MCR SAV<CR>"

6) In response to the prompt SAV> type "SY0:/WB<CR>"

This will save the patched RSX20F system image on the front-end
file system.







The following patch is edit B to RSX20F V15-15.

To apply this patch do the following:

1) Shut down the system by typing the following:

^\		! Control-\ to invoke the PARSER

PAR>SHUT	! Causes TOPS-10/20 to stop running

2) Now reboot the Console Front End by setting the switches on

   the PDP-11 to 203 (switches 0,1, and 7 up, others down) and

   pressing the ENABLE and SWITCHES load switches on the KL10

   front panel.

3) Type ^\ (Control-\) to invoke the PARSER

4) In response to the PAR> prompt type the following (text 
   beginning with an exclamation mark is a comment and need
   not be typed on the console terminal):

SET CONSOLE MAINTENANCE 

SET MEMORY ELEVEN


!	LSPTAB::
!		.BYTE	174			; 110 BAUD ^C
!		.BYTE	015			; 300 BAUD CR
DEPOSIT 32610=6574

!		.BYTE	215			; 300 BAUD CR
!		.BYTE	003			; 300 BAUD ^C
DEPOSIT NEXT=1615


!		.BYTE	203			; 300 BAUD ^C
!	HSPTAB::
!		.BYTE	200			; 300 BAUD CR OR ^C
DEPOSIT NEXT=100203

!	LSPSPD::
!		.BYTE	00			; 110 BAUD ^C
!		.BYTE	02			; 300 BAUD CR
DEPOSIT 32632=1000

!		.BYTE	02			; 300 BAUD CR
!		.BYTE	02			; 300 BAUD ^C
DEPOSIT NEXT=1002

!		.BYTE	02			; 300 BAUD ^C
!	HSPSPD::
!		.BYTE	LSP.IG!02		; 300 BAUD CR OR ^C
DEPOSIT NEXT=101002

!		.ASCII	/5B/			; CALL THIS EDIT B
DEPOSIT 1044=41065

SET CONSOLE OPERATOR

5) Now type "MCR SAV<CR>"

6) In response to the prompt SAV> type "SY0:/WB<CR>"

This will save the patched RSX20F system image on the front-end
file system.






4)  TOPS-20 XON/XOFF HANDLING

The front end now handles XON/XOFF without need of intervention from the
monitor.  A patch to TOPS-20 is required in order to bring it in line with
this new "protocol".  This patch should only be installed if you install
version 15-15 of RSX-20F, with expections noted below.  In addition to
appearing here, it will also be on Autopatch tape 9 for TOPS-20, as a separate
REL file; and should be on Autopatch tape 10, incorporated in the usual manner.
(TOPS-10 already has the appropriate changes in version 7.02 of the monitor.)



                        **********


[SYMPTOM]
 
 
     Terminal lines appear to lose  an  occasional  XON  and  possibly
XOFFs as well.  This edit replaces edit 2906.
 
 
[DIAGNOSIS]
 
     When RSX20F receives an XOFF, it  stops  output  immediately  and
passes  the  XOFF  through  to  TOPS20 so that TOPS20 can stop sending
characters.  TOPS20 will turn around and tell the  front-end  to  stop
output  which  is redundant as it forces RSX20F to go through the same
code it executed when it first received the XOFF.
 
     When RSX20F receives an XON, it does nothing other than pass  the
character  through  to  TOPS20.  TOPS20 will then see the XON and tell
RSX20F to start output again.
 
     It is unclear exactly how it happens, but it  appears  that  this
scenario  produces  a race condition which can make 20F appear to lose
the XON in rare circumstances.
 
 
[CURE]
 
     Eliminate any possibility of race conditions.   Allow  RSX20F  to
control both the starting and stopping of output, rather than just the
stopping.  Create a bit in TTSTAT (TT%XFF) that allows TOPS20 to force
the front-end to set/clear the XOFFed state.  This has to be done when
the monitor needs to specifically overide XON/XOFF.  These places  are
at  .STPAR+25  (where  TT%PGM  mode  is  turned off,) TTYDE4+31 (where
terminal lines are reset,) and at TTCBF7+1 (where output  buffers  are
flushed.)  A  new  routine  TTXONF  has  been  created to perform this
overide task.  It will need to set TT%XFF only if an XOFF state exists
(i.e.  TT%RXF is set.)
 
     This edit requires  a  version  of  RSX-20F  that  uses  the  new
protocol  for  XON  and  XOFF.  Versions 15-06 or greater may be used.
Version 14-45 may be used only  if  edit  A  is  applied.   Note  that
version  14-45G  does  not  contain  edit A, it must be patched.  When
installing edit A (using 20-RSX20F-31), do NOT  install  MONITOR  edit
2906 which is included in 20-RSX20F-31.  Use this edit instead.



PCO Log Report
[EDIT]
@
@; EDIT 3176 - FIXES XON/XOFF RACES
@
@; THIS EDIT CHANGES THE PROTOCOL FOR HANDLING XON/XOFF
@; IT MUST BE USED WITH VERSION 15-06 OF RSX20F OR GREATER
@; IT MAY ALSO BE USED WITH VERSION 14-45 IF EDIT A IS APPLIED
@; NOTE THAT VERSION 14-45G WAS NOT RELEASED WITH EDIT A. IT
@; MUST BE PATCHED.
@
$ENABLE (CAPABILITIES)
$GET SYSTEM:MONITR.EXE
$START (PROGRAM) 140
DDT
TTXON1+2/   MOVEI T1,21   JRST FFF	
FFF/   0   MOVEI CX,100000
FFF+1/   0   TDNN CX,0(T2)
FFF+2/   0   RET
FFF+3/   0   ANDCAM CX,0(T2)
FFF+4/   0   MOVEI A,.DFXON
FFF+5/   0   JRST TTXON1+3
FFF+6/   0   FFF:
 
TTCHI3+1/   HRRZ T2,T1(T2)   JRST FFF	
FFF/   0   MOVEI CX,100000
FFF+1/   0   TDNN CX,0(T2)
FFF+2/   0   RET
FFF+3/   0   ANDCAM CX,0(T2)
FFF+4/   0   HRRZ T2,1(T2)
FFF+5/   0   JRST TTCHI3+2
FFF+6/   0   FFF:
 
FFF/   0   TTXONF:   MOVE CX,0(T2)
TTXONF+1/   0   TLNN CX,4
TTXONF+2/   0   JRST TTXONA
TTXONF+3/   0   MOVEI CX,100000
TTXONF+4/   0   IORM CX,0(T2)
TTXONF+5/   0   JRST TTXONA
TTXONF+6/   0   FFF:
 
TTCBF7+1/   CALL TTXONA   CALL TTXONF
TTYDE4+30/   CALL TTXONA   CALL TTXONF
.STPAR+25/   CALL TTXONA   CALL TTXONF
^Z
$SAVE SYSTEM:MONITR
 <SYSTEM>MONITR.EXE.2 SAVED
$