Talk:Installing SITS on SIMH - Revision history

Jnc: /* MB11 */ Try the ITS community?

2022-10-11T14:40:58Z

‎MB11: Try the ITS community?

Larsbrinkhoff at 13:40, 11 October 2022

2022-10-11T13:40:31Z

Larsbrinkhoff: /* MB11 */ Dropping some names.

2022-10-11T13:39:58Z

‎MB11: Dropping some names.

Jnc: /* MB11 */ + missing sig

2022-10-11T12:58:47Z

‎MB11: + missing sig

Jnc: /* MB11 */ No info; and suggestions for next steps

2022-10-11T12:55:15Z

‎MB11: No info; and suggestions for next steps

Larsbrinkhoff: What's an MB11?

2022-10-11T09:37:29Z

What's an MB11?

New page

==MB11==
Noel, have you ever heard about an MB11 device? It's described like this in SITS:
<pre>
;MB11 MAR AND HISTORY REGISTER
MBCSR=170000+0 ;CONTROL AND STATUS
MBXHGH=MBCSR+2 ;HIGH BITS OF X REGISTER
MBXLOW=MBCSR+4 ;LOW BITS OF X REGISTER
MBYHGH=MBCSR+6 ;HIGH BITS OF Y REGISTER
MBYLOW=MBCSR+10 ;LOW BITS OF Y REGISTER
MBHHGH=MBCSR+12 ;HIGH BITS OF HISTORY REGISTER
MBHLOW=MBCSR+14 ;LOW BITS OF HISTORY REGISTER
MBHCNT=MBCSR+16 ;HISTORY MEMORY COUNTER
;BREAK VECTOR
MBBRV=374
</pre>
I have not found any documentation, e.g. on Bitsavers.

@@ Line 20: / Line 20: @@
 : So I'd guess it's some MIT home-rolled peripheral; given the X-Y 'MAR' (usually means 'memory address register), maybe some kind of graphical thing?
 : Probably your best bet is to contact a SITS hacker and see if they remember. Radia is still with us; who else worked on SITS? Oh, you might try looking at AI Lab publications on SITS, to see if they mention an MB11; as a hand-rolled peripheral, it should have been mentioned. [[User:Jnc|Jnc]] ([[User talk:Jnc|talk]]) 14:54, 11 October 2022 (CEST)
 :: Thanks it's good to know it probably wasn't a DEC device.  I have the impression Ron Lebel was the head Logo programmer.  I have been in touch with him and Radia, but understandably they don't remember much.  There was also Bruce E Edwards, who I have not been able to track down. [[User:Larsbrinkhoff|Larsbrinkhoff]] ([[User talk:Larsbrinkhoff|talk]]) 15:39, 11 October 2022 (CEST)

@@ Line 20: / Line 20: @@
 : So I'd guess it's some MIT home-rolled peripheral; given the X-Y 'MAR' (usually means 'memory address register), maybe some kind of graphical thing?
 : Probably your best bet is to contact a SITS hacker and see if they remember. Radia is still with us; who else worked on SITS? Oh, you might try looking at AI Lab publications on SITS, to see if they mention an MB11; as a hand-rolled peripheral, it should have been mentioned. [[User:Jnc|Jnc]] ([[User talk:Jnc|talk]]) 14:54, 11 October 2022 (CEST)
-:: I have the impression Ron Lebel was the head Logo programmer.  I have been in touch with him and Radia, but understandably they don't remember much.  There was also Bruce E Edwards, who I have not been able to track down. [[User:Larsbrinkhoff|Larsbrinkhoff]] ([[User talk:Larsbrinkhoff|talk]]) 15:39, 11 October 2022 (CEST)
+:: Thanks it's good to know it probably wasn't a DEC device.  I have the impression Ron Lebel was the head Logo programmer.  I have been in touch with him and Radia, but understandably they don't remember much.  There was also Bruce E Edwards, who I have not been able to track down. [[User:Larsbrinkhoff|Larsbrinkhoff]] ([[User talk:Larsbrinkhoff|talk]]) 15:39, 11 October 2022 (CEST)

← Older revision		Revision as of 13:39, 11 October 2022
Line 20:		Line 20:
	: So I'd guess it's some MIT home-rolled peripheral; given the X-Y 'MAR' (usually means 'memory address register), maybe some kind of graphical thing?		: So I'd guess it's some MIT home-rolled peripheral; given the X-Y 'MAR' (usually means 'memory address register), maybe some kind of graphical thing?
	: Probably your best bet is to contact a SITS hacker and see if they remember. Radia is still with us; who else worked on SITS? Oh, you might try looking at AI Lab publications on SITS, to see if they mention an MB11; as a hand-rolled peripheral, it should have been mentioned. [[User:Jnc\|Jnc]] ([[User talk:Jnc\|talk]]) 14:54, 11 October 2022 (CEST)		: Probably your best bet is to contact a SITS hacker and see if they remember. Radia is still with us; who else worked on SITS? Oh, you might try looking at AI Lab publications on SITS, to see if they mention an MB11; as a hand-rolled peripheral, it should have been mentioned. [[User:Jnc\|Jnc]] ([[User talk:Jnc\|talk]]) 14:54, 11 October 2022 (CEST)
		+	:: I have the impression Ron Lebel was the head Logo programmer. I have been in touch with him and Radia, but understandably they don't remember much. There was also Bruce E Edwards, who I have not been able to track down. [[User:Larsbrinkhoff\|Larsbrinkhoff]] ([[User talk:Larsbrinkhoff\|talk]]) 15:39, 11 October 2022 (CEST)

@@ Line 14: / Line 14: @@
 MBBRV=374
 </pre>
-I have not found any documentation, e.g. on Bitsavers.
+I have not found any documentation, e.g. on Bitsavers. [[User:Larsbrinkhoff|Larsbrinkhoff]] ([[User talk:Larsbrinkhoff|talk]]) 11:37, 11 October 2022 (CEST)
 : I have never heard of it. I have a near-complete set of PDP-11 fiche, which contains all sorts of unusual things which are not available online, and it doesn't have it, in any section, either. I did a Web search on 'MB11 PDP-11' (and similar things), with no results there either.

← Older revision		Revision as of 12:55, 11 October 2022
Line 15:		Line 15:
	</pre>		</pre>
	I have not found any documentation, e.g. on Bitsavers.		I have not found any documentation, e.g. on Bitsavers.
		+
		+	: I have never heard of it. I have a near-complete set of PDP-11 fiche, which contains all sorts of unusual things which are not available online, and it doesn't have it, in any section, either. I did a Web search on 'MB11 PDP-11' (and similar things), with no results there either.
		+	: Mx1[01] in DEC naming usually refers to memory of some kind ([[MA10]], [[ME11]], etc), but the registers you show there don't look like ordinary memory.
		+	: So I'd guess it's some MIT home-rolled peripheral; given the X-Y 'MAR' (usually means 'memory address register), maybe some kind of graphical thing?
		+	: Probably your best bet is to contact a SITS hacker and see if they remember. Radia is still with us; who else worked on SITS? Oh, you might try looking at AI Lab publications on SITS, to see if they mention an MB11; as a hand-rolled peripheral, it should have been mentioned. [[User:Jnc\|Jnc]] ([[User talk:Jnc\|talk]]) 14:54, 11 October 2022 (CEST)