PDP-11/05 (was: PDP-11/05 microcode dump?)

[steven at malikoff.com]

Tom said
> On 6/17/21 6:57 AM, Steve Malikoff via cctalk wrote:
>> Tom said
>>> I have a couple different drawing sets for the 11/05 and while some have the matching M7260
>>> schematic, only the GT40 drawings (I found on bitsavers) has the M7261E schematic:
>>>
>>> http://www.bitsavers.org/pdf/dec/graphics/VT11/GT40_Graphic_Terminal_Engineering_Drawings_Feb73.pdf
>>>
>>> The GT40 drawings has the PROM listings and related, so I am hoping that they match what is in the
>>> two boards.
>> My original PDP-11/05 print set that came from the BHP steelworks is titled just 'PDP-11/05 Engineering
>> Drawings' and the drawings are for machine revision 1105-0. It covers the early 11/05 with the cast metal
>> grille with no slots (as seen in the 11/05 handbook) rather than the later 11/05 with the plastic slotted
>> grille.
>> The dates on the drawings are 1972 and some of the microcode listing dates are different to the 'PDP-11/05-S,
>> 11/10-S systems engineering drawings' bitsavers scan and the GT-40 scan, and some of them are the same.
>>
>> I'm not sure where I look to see what revision of the M7261 it shows, as the Rev box in the bottom right
>> seems to jump around, eg. Rev N, Rev K, Rev H or is that just the minor drawing revision for that page?
>>
>> Steve
>>
> If you look at the board layout for the M7261, the E rev board has a large open area, devoid of ICs,
> whereas
> the non-E rev board has a uniform distribution of ICs across the surface.
>
> --tom
>

Yes my M7261 board drawing appears to be the earlier one, similar to the GT40 drawing but is
revision N instead of M. (I myself have an early 11/05 s/n 151 but it has a later M7261 in it.)

>From the ex-BHP print set the microcode listing details and Page Revision Control Sheet latests are

----
K-MP-KD11-B-1	MICROPROGRAM FLOW		Rev B
(PRCS: Rev. B [BAAAAABAAAAAAAAAAAAAAA])	(Listing: K-MP-KD-11B-1 Rev. A 27-JUL-72)
----
K-MP-KD11-B-2	MICROPROGRAM SYMBOLIC LISTING	Rev D
(PRCS: Rev. D [DABCBA])			(Listing: K-MP-KD-11B-2 Rev. A 27-JUL-72)
----
K-MP-KD11-B-3	MICROPROGRAM BINARY LISTING	Rev D
(PRCS: Rev. D [DABBBBA])		(Listing: K-MP-KD-11B-3 Rev. A 27-JUL-72)
----
K-MP-KD11-B-4	MICROPROGRAM CROSS REF LISTING	Rev D
(PRCS: Rev. -)	(Listing: K-MP-KD-11B-4 Rev. * 2-MAY-72)

----------------------------
M7620-0-1 	DATA PATHS	Rev. N
(PRCS: Rev. N [NNNNMMMNMMMM])

M7260-0-8	DATA PATH ROM PATTERNS 		Rev. ? (same as GT40)
----------------------------
M7261-0-1 CONTROL LOGIC AND MICROPROGRAM	Rev. P
(PRCS: Rev. P [PNHHJKJHJMKKKH])

M7261-0-1 CONTROL LOGIC ROM PATTERNS		Rev. A (same as GT40)
(PRCS: Rev. A [AAAAAAAAAAAAAAAAA])

Steve.