11/45 RTC

Googling for DL11-W CD1 found the following (old - 1997) post to Classiccmp by Tim Shoppa. Perhaps it'll help. -Rick Sheesh. Why do I even bother running a FTP site filled with hardware documentation when nobody even bothers to read it? In any event, here are dl11-w.info and dl11-w.info2 from ftp://sunsite.unc.edu/pub/academic/computer-science/history/pdp-11/hardware : Here's some stuff about the M7856 (DL11-W) module (combined serial port/real-time clock), taken from the print-set. As far as I can remember, there are 5 sets of dip-switches on the board. Mode of operation is selected as follows: Mode 1: serial line and RTC can both be addressed. Serial line addresses are restricted to 77756X. [Standard console address]. Line clock is at 777546. Mode 2: Only serial line can be addressed. Address selection ranges from 774000 to 777777. Line clock is disabled. Mode 3: Only line clock can be addressed, serial line does not respond to any address. Line clock is at 777546. Mode selection & address bits: Address bit A10 A09 A08 A07 A06 A05 A04 A03 N/A N/A Switch S5-3 S5-2 S5-1 S5-4 S5-5 S5-6 S5-8 S5-7 S5-9 S5-10 Mode 1 Off Off Off On Off Off Off On Off On Mode 2 Off Off Off On Off Off Off On On Off Mode 3 Off Off Off On Off Off On On On On Mode 2 is shown for serial line addresses 77756X. For address bits in mode 2, switch off = 1 and switch on = 0. [Apparently, it is not possible to deviate from the specified address for the serial port in Mode 1 -- I have a feeling that if you fiddle with the address switches in Mode 1, the LTC address may move as well.] Note: remove R63 from DL11-W operating in Mode 2 to allow proper operation of a line frequency clock or other DL11-W in Mode 1 or Mode 3. [R63 goes from the BUS LTC L signal at pin CD1 on the backplane connector to (among other things) pin 9 on a 7414, and is a 330 ohm resistor. It should be easy enough to find -- I don't have a layout diagram for the board.] Vector Address Assignments Line clock is fixed at 100. Serial line assignments are floating vectors of the form XX0 (receiver) and XX4 (transmitter), where XX is 00 to 77. For console device, vector should be 060/064. Vector bit V8 V7 V6 V5 V4 V3 switch S2-8 S2-7 S2-5 S2-3 S2-6 S2-4 060/064 Off Off Off On On Off On=1, Off=0. Data Format Bits per Character S4-4 S4-3 Bits On On 5 On Off 6 Off On 7 Off Off 8 Parity S4-2 S4-6 Parity Off Off Off On Off Off Off On Even On On Odd Stop Bits S4-5 Stop bits On 1 Off 2 (or 1.5 if 5 data bits selected) Baud Rate Selection Rate Receiver Transmitter S3-2 S3-3 S3-5 S4-10 S3-1 S3-4 110 Off Off Off On On On 150 On Off Off Off On On 300 Off On On On Off Off 600 Off On Off On Off On 1200 Off Off On On On Off 2400 On On On Off Off Off 4800 On On Off Off Off On 9600 On Off On Off On Off Current Loop Active/Passive Selection Transmitter S1-1 S1-2 S1-3 S1-6 S1-7 Active On On Off Off On Passive Off Off On On Off Receiver S3-6 S3-7 S3-8 S3-9 S3-10 Active On Off On Off On Passive Off On Off On Off Reader Enable S1-4 S1-5 S1-8 S1-9 S1-10 Active On Off On Off On Passive Off On Off On Off [There is a spade lug on the board, near the front edge, which can be connected to one of the spade lugs on the M9301 bootstrap module, so that pressing BREAK on your terminal keyboard will cause the machine to bomb into the bootstrap module's console emulator.] So there you go. I've used one of these boards on my 11/40 for several years now, without much bother. I have an M9301 for bootstrap, and am good at avoiding BREAK when typing! The only thing that occurs to me about the problems you've been having is: is there another device (e.g. bootstrap board) in your system that includes an LTC circuit? See the note about R63 above. You can reset the 11/34 CPU by placing CONT/HALT in HALT position, then operating BOOT/INIT. It is indeed possible to disable the on-board SLU on a KD11-B (11/05 CPU). I assume (please correct me if I'm wrong) that an 11/10 is similar. According to my print set, "with W1 *installed* the CPU does not respond to internal addresses 177560-177566 and another interface device corresponding to these standard console addresses can be configured with the KD11-B." W1 is on the M7261 board (control logic and microprogram board) between E69 and C51 (about halfway up the board, roughly in line with edge connector DH1/DH2). The DL11-W (M7856) has 5 DIP switch packs, to set address, vector, baud rate, etc. Unfortunately, the functions aren't handily grouped (except in the sense one might use if laying out a PCB :-) Approximate layout (ASCII art isn't my best point): \______/ \______/ \______/ _____II_____________II___________________________II_____ | | | ___ | | Berg | / |UU,VV | connector | | | | | | | | | | | | | | | | S3: 1..10 |__\ | B,A | | | | | | | S1: 1..10 | | | | S5: 1..10 | | S4: 1..10 | | | | | | | | | | S2: 1..8 | | ___ __ ___ | | | | | | | | | |__________| |__________| |__________| |__________| The DL11-W has a Line-Time Clock and one SLU, which can be used in EIA (RS232) mode or 20mA current-loop. There are three address modes: 1) Both SLU and LTC active. Only possible if SLU address is set to 77756x. LTC address is 777546. 2) Only the SLU is addressable, in the range 774000-777776. LTC disabled. 3) Only the LTC is addressable, the SLU is disabled. Standard address settings: addr.bit: A10 A9 A8 A7 A6 A5 A4 A3 LTC LTC switch: S5-3 S5-2 S5-1 S5-4 S5-5 S5-6 S5-8 S5-7 S5-9 S5-10 Mode 1: off off off ON off off off ON off ON Mode 2: off off off ON off off off ON ON ON Mode 3: off off off ON off off ON ON ON ON I've shown the mode2 setting for standard console address. It can be changed, ON=0 and OFF=1 for the appropriate address bits. Standard vector settings: The LTC vector is fixed at 100. For console use, the SLU vector should be set to 60, otherwise use the normal vector allocation. For S2, ON=1 and OFF=0 (opposite way to S5). S2-1, S2-2 do nothing. Vector bit: V8 V7 V6 V5 V4 V3 switch: S2-8 S2-7 S2-5 S2-3 S2-6 S2-4 for console: off off off ON ON off The SLU provides 20mA and EIA signals on different pins of the Berg connector. Standard BC05C, 7008360, or 7008519 cables can be used (see below). The 20mA current loop provides RDR ENBL, and can be active or passive, independantly set for transmitter and receiver: Transmitter: S1-1 S1-2 S1-3 S1-6 S1-7 Active: ON ON off off ON Passive: off off ON ON off Receiver: S3-6 S3-7 S3-8 S3-9 S3-10 Active: ON off ON off ON Passive: off ON off ON off Reader Enable: S1-4 S1-5 S1-8 S1-9 S1-10 Active: ON off ON off ON Passive: off ON off ON off Baud rates: _____Transmit_____ ______Receive_____ S4-10 S3-1 S3-4 S3-2 S3-3 S3-5 110 ON ON ON off off off 150 off ON ON ON off off 300 ON off off off ON ON 600 ON off ON off ON off 1200 ON ON off off off ON 2400 off off off ON ON ON 4800 off off ON ON ON off 9600 off ON off ON off ON The remaining switch settings are for data format: (No)Parity: S4-6 When on, enable parity. Odd/Even: S4-2 When on, and S4-6 is on, use ODD parity When off, and S4-6 is on, use EVEN parity If S4-6 is off, this switch has no effect STOP bits: S4-5 ON = 1 stop bit OFF = 2 stop bits (6,7, or 8-bit data) OFF = 1.5 stop bits (5-bit data) Data word length: 5 bits 6 bits 7 bits 8 bits S4-3 ON off ON off S4-4 ON ON off off Cable pinouts (blank means "no connection"): Numbers are DB25 pin numbers (for the BC05C) or Mate-N-Lok pin numbers (for 7008360): Berg pin Signal BC05C 7008360 A Ground 1 Prot.Ground (blue/wht) - ground B Ground 7 Signal Ground (brwn/wht) C 25 Force Busy (red/org) D 13 Secondary CTS (org/red) E TTL serial in - interlock in - interlock in F EIA serial out 2 Transmit Data (wht/blue) H 20mA interlock - interlock out J EIA serial in 3 Receive Data (org/wht) K +20mA serial in 7 + Rec.Data (green) L 24 External clk (brwn/red) M EIA interlock - interlock out N 15 serial clk xmit (grey/grn) P 19 Secondary RTS (lbue/blk) R 17 serial clk recv (grey) S -20mA serial in 3 - Rec.Data (red) T 5 Clear To Send (grn/wht) U V EIA RTS 4 Request To Send (wht/org) W 10 -ve power (wht/grey) X 22 Ring (blk/org) Y 9 +ve power (grey/wht) Z 6 Data Set Ready (wht/grn) AA +20mA serial out 5 + Trans.Data (white) BB 8 Data Carrier Detect (wht/brwn) CC DD EIA DTR 20 Data Terminal Ready (blk/blu) EE -20mA RDR Run 3 - Reader Run (black) FF 11 202 Secondary TD (blu/red) HH JJ 12 202 Secondary RD (red/blu) KK -20mA serial out 2 - Trans.Data (black) LL 14 EIA Secondary TD (grey/red) MM 21 Signal Quality (org/blk) NN 16 EIA Secondary RD (red/brwn) PP +20mA RDR Run 6 + Reader Run (black) RR 23 Signal Rate (grn/blk) SS TT +5V DC UU ground VV ground