KDF11-U CPU - Revision history

Jnc: +New category

2024-02-06T14:16:23Z

+New category

Jnc: CPU board location

2022-05-31T03:24:48Z

CPU board location

Jnc: /* See also */ +KDF11-U CPU pinout

2022-05-31T01:20:47Z

‎See also: +KDF11-U CPU pinout

Jnc: /* ECO's */ minor copedits

2022-04-03T18:27:42Z

‎ECO's: minor copedits

Jnc: Describe un-documented ECO

2022-04-03T16:25:45Z

Describe un-documented ECO

Jnc: +Hardware details

2022-03-29T20:55:22Z

+Hardware details

Jnc: /* External links */ typo, +clr copy

2022-01-15T15:47:07Z

‎External links: typo, +clr copy

Jnc: /* External links */ typo

2022-01-15T11:10:17Z

‎External links: typo

Jnc: /* External links */ +FMPS, manual

2022-01-14T23:25:35Z

‎External links: +FMPS, manual

Jnc: link chips

2021-02-02T20:26:35Z

link chips

← Older revision		Revision as of 14:16, 6 February 2024
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	[[Category: PDP-11 UNIBUS Processors]]		[[Category: PDP-11 UNIBUS Processors]]
		+	[[Category: Extended UNIBUS]]
		+	[[Category: DEC Documentation Errors]]

@@ Line 1: / Line 1: @@
 [[Image:KDF11-U.jpg|300px|thumb|right|KDF11-U card with [[KTF11-A memory management chip|KTF11-A]] and [[KEF11-A floating point chip|KEF11-A]]]]
-The '''KDF11-U''' is the [[PDP-11 architecture|PDP-11]] [[Central Processing Unit|CPU]] for the [[PDP-11/24]]; it was implemented as a single [[DEC card form factor|hex]] [[printed circuit board|board]], the KDF11-UA '''M7133'''. It used the same 'Fonz' [[F-11 chip set]] as the other KDF11 CPUs; however, it used the [[UNIBUS]], unlike the [[QBUS]] of the other [[KDF11 CPUs]].
+The '''KDF11-U''' is the [[PDP-11 architecture|PDP-11]] [[Central Processing Unit|CPU]] for the [[PDP-11/24]]; it was implemented as a single [[DEC card form factor|hex]] [[printed circuit board|board]], the KDF11-UA '''M7133'''. It used the same 'Fonz' [[F-11 chip set]] as the other KDF11 CPUs; however, it used the [[UNIBUS]], unlike the [[QBUS]] of the other [[KDF11 CPUs]]. It plugs into a custom slot in the likewise custom PDP-11/24 [[backplane]] ([[DEC part number]] 54-13817, assembly 70-16905).
 The board has seven 40-pin [[Dual Inline Package|DIP]] [[chip socket]]s for the [[integrated circuit|chipset]] (including the [[KTF11-A memory management chip|KTF11-A]] [[PDP-11 Memory Management|memory management]] and [[KEF11-A floating point chip|KEF11-A]] [[floating point]] chips); it can also hold the double-width [[KEF11-B CIS chip|KEF11-B]] 6-chip carrier implementing the [[PDP-11 Commercial Instruction Set]] (CIS) (not all KDF11 CPUs can hold this). In addition to the basic CPU functionality, the board also included two [[asynchronous serial line]]s (led out through the [[backplane]]).

← Older revision		Revision as of 01:20, 31 May 2022
Line 38:		Line 38:

	The incoming ACLO from the transceiver (E52p6) now has a wire going to a PTH next to E70p8. On the bottom side of the [[printed circuit board\|PCB]], there's a trace from that PTH to E66p13 - which is the [[inverter]] (shown on K2) which converts BUF ACLO H to POWER OK H. So that answers the inevitable query about E70p1 (and its output, E70p2) being left floating after the etch cut: perhaps there's an etch cut somewhere that disconnected E66p13 from E70p2, so the former can now be driven by E52p6. (There is a trace from that latter PTH which dives under E70, and although it's hard to see it, it looks like it goes to E70p2.) It would be interesting to know what they did about the E70p2 -> E66p13 connection.		The incoming ACLO from the transceiver (E52p6) now has a wire going to a PTH next to E70p8. On the bottom side of the [[printed circuit board\|PCB]], there's a trace from that PTH to E66p13 - which is the [[inverter]] (shown on K2) which converts BUF ACLO H to POWER OK H. So that answers the inevitable query about E70p1 (and its output, E70p2) being left floating after the etch cut: perhaps there's an etch cut somewhere that disconnected E66p13 from E70p2, so the former can now be driven by E52p6. (There is a trace from that latter PTH which dives under E70, and although it's hard to see it, it looks like it goes to E70p2.) It would be interesting to know what they did about the E70p2 -> E66p13 connection.
		+
		+	==See also==
		+
		+	* [[KDF11-U CPU pinout]]

	==External links==		==External links==

@@ Line 37: / Line 37: @@
 E52p5 (the transceiver's input) is connected to E73p13 (an DS8640 quad NOR used as a bus reciver), in the upper left corner of K2. That produces UNIBUS PB L NOR UNIBUS PA H - i.e. a [[parity]] error has been [[UNIBUS parity|detected in memory]] - to which the response is apparently to power-fail the system!
-The incoming ACLO from the transceiver (E52p6) now has a wire going to a PTH next to E70p8. On the bottom side of the [[PCB]], there's a trace from that PTH that goes to E66p13 - which is the inverter (shown on K2) which converts BUF ACLO H to POWER OK H. So that answers the inevitable query about E70p1 being left floating after the etch cut: perhaps there's an etch cut somewhere that disconnected E66p13 from E70p2, so the former can now be driven by E52p6.  (Theren is a trace from that latter PTH which dives under E70, and it's hard to see it, but it looks like it goes to E70p2.) It would be interesting to know what they did about the E70p2 -> E66p13 connection.
+The incoming ACLO from the transceiver (E52p6) now has a wire going to a PTH next to E70p8. On the bottom side of the [[printed circuit board|PCB]], there's a trace from that PTH to E66p13 - which is the [[inverter]] (shown on K2) which converts BUF ACLO H to POWER OK H. So that answers the inevitable query about E70p1 (and its output, E70p2) being left floating after the etch cut: perhaps there's an etch cut somewhere that disconnected E66p13 from E70p2, so the former can now be driven by E52p6.  (There is a trace from that latter PTH which dives under E70, and although it's hard to see it, it looks like it goes to E70p2.) It would be interesting to know what they did about the E70p2 -> E66p13 connection.
 ==External links==

@@ Line 25: / Line 25: @@
 ===LED's===
-The board contains three [[Light Emitting Diode|LED]]'s (along the upper edge), which provide [[diagnostic]] information. One (marked 'CLK') an indication that the CPU's main internal clock (on page K1 of the prints, in the very upper left corner) is running. The other two (left center, page K12) are driven by a write-only [[register]], and are used by diagnostic code in the [[bootstrap]] to indicate progress.
+The board contains three [[Light Emitting Diode|LED]]'s (along the upper edge), which provide [[diagnostic]] information. One (marked 'CLK') an indication that the CPU's main internal clock (on page K1 of the prints, in the very upper left corner) is running. The other two ('0' and '1'; left center, page K12) are driven by a write-only [[register]], and are used by diagnostic code in the [[bootstrap]] to indicate progress.
 The CLK LED is driven directly by the MCLK L internal [[signal]]; if that LED is not on, the CPU is not running. If either the bus ACLO or DCLO signals is asserted, MCLK L is off.
 ==External links==

@@ Line 1: / Line 1: @@
 [[Image:KDF11-U.jpg|300px|thumb|right|KDF11-U card with [[KTF11-A memory management chip|KTF11-A]] and [[KEF11-A floating point chip|KEF11-A]]]]
-The '''KDF11-U''' is the [[PDP-11 architecture|PDP-11]] [[Central Processing Unit|CPU]] for the [[PDP-11/24]]; it used the [[UNIBUS]], unlike the [[QBUS]] of the other [[KDF11 CPUs]]. It was implemented as a single [[DEC card form factor|hex]] [[printed circuit board|board]], the KDF11-UA '''M7133''', using the same 'Fonz' [[F-11 chip set]] as the other KDF11 CPUs.
+The '''KDF11-U''' is the [[PDP-11 architecture|PDP-11]] [[Central Processing Unit|CPU]] for the [[PDP-11/24]]; it was implemented as a single [[DEC card form factor|hex]] [[printed circuit board|board]], the KDF11-UA '''M7133'''. It used the same 'Fonz' [[F-11 chip set]] as the other KDF11 CPUs; however, it used the [[UNIBUS]], unlike the [[QBUS]] of the other [[KDF11 CPUs]].
-The board has seven 40-pin [[chip socket]]s for the [[integrated circuit|chipset]] (including the [[KTF11-A memory management chip|KTF11-A]] [[PDP-11 Memory Management|memory mapping]] and [[KEF11-A floating point chip|KEF11-A]] [[floating point]] chips); it can also hold the double-width [[KEF11-B CIS chip]] 6-chip carrier implementing the [[PDP-11 Commercial Instruction Set]] (CIS) (not all KDF11 CPUs can hold this). In addition to the basic CPU functionality, the board also included two [[asynchronous serial line]]s (led out through the [[backplane]]).
+The board has seven 40-pin [[Dual Inline Package|DIP]] [[chip socket]]s for the [[integrated circuit|chipset]] (including the [[KTF11-A memory management chip|KTF11-A]] [[PDP-11 Memory Management|memory management]] and [[KEF11-A floating point chip|KEF11-A]] [[floating point]] chips); it can also hold the double-width [[KEF11-B CIS chip|KEF11-B]] 6-chip carrier implementing the [[PDP-11 Commercial Instruction Set]] (CIS) (not all KDF11 CPUs can hold this). In addition to the basic CPU functionality, the board also included two [[asynchronous serial line]]s (led out through the [[backplane]]).
-There are two different versions of the KDF11-U; in the later M7133-YA, in order to reduce the cost, a number of individual [[Dual Inline Package|DIP]] [[integrated circuit|chips]] were replaced with a pair of custom [[gate array]] chips, and the board was re-laid-out.
+There are two different versions of the KDF11-U; in the later M7133-YA, in order to reduce the cost, a number of individual DIP [[integrated circuit|chips]] were replaced with a pair of custom [[gate array]] chips, and the board was re-laid-out.
 ==External links==
@@ Line 11: / Line 33: @@
 * [http://www.bitsavers.org/pdf/dec/pdp11/1124/EK-11024-TM-001_PDP11_24_System_Technical_Manual_Jun81.pdf PDP-11/24 System Technical Manual] (EK-11024-TM-001) - the KDF11-U is covered in Chapters 3-5
 * [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/dload/EK-11024-TM-003.pdf PDP-11/24 System Technical Manual] (EK-11024-TM-003) - the M7133-YA is documented in Appendix D
-* [http://www.bitsavers.org/pdf/dec/pdp11/1124/MP01018_1124schem_Aug80.pdf 11/24 Field Maintenance Print Set] - - KDF11-UA Field Maintenance Print Set (MP01028) is on pp. 145-167
+* [http://www.bitsavers.org/pdf/dec/pdp11/1124/MP01018_1124schem_Aug80.pdf 11/24 Field Maintenance Print Set] - KDF11-UA Field Maintenance Print Set (MP01028) is on pp. 145-167
-[[Category:PDP-11 Processors]]
+[[Category: PDP-11 UNIBUS Processors]]

@@ Line 10: / Line 10: @@
 * [http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/dload/EK-11024-TM-003.pdf PDP-11/24 System Technical Manual] (EK-11024-TM-003) - the KDF11-U is covered in Chapters -5; the M7133-YA is documented in Appendix D
-* [http://www.bitsavers.org/pdf/dec/pdp11/1124/MP01018_1124schem_Aug80.pdf xx Field Maintenance Print Set ] - - KDF11-UA Field Maintenance Print Set (MP01028) is on pp. 145-167
+* [http://www.bitsavers.org/pdf/dec/pdp11/1124/MP01018_1124schem_Aug80.pdf 11/24 Field Maintenance Print Set] - - KDF11-UA Field Maintenance Print Set (MP01028) is on pp. 145-167
 {{Nav PDP-11}}