DEC PRO 380 Notes ================= Miscellaneous notes that are unattributed. I didn't write all this, but I lost track of who did. Thanks... ---------------- To boot from a floppy, power up and wait for the diskette to be displayed, then insert the floppy disk. If there is an OS on the hard disk, it will boot first. Use that OS to boot from the floppy. ---------------- Keyboard is equivalent to the LK201. The following notes describe the LK201 interconnects. ---------------- LK201 Electrical Specifications This section describes the electrical interface between the LK201 Keyboard and the computer. Some of these specifications came from publication EK-366AA-OG-002 "DECstation 5000, Model 200 Hardware Operator's Guide, April 1990". The rest of the items in this section were experimentally determined (like the pin outs). The LK201 is powered from a 12 Volt supply generated by the computer. The keyboard and the computer communicate via a fairly standard serial interface. The key specifications are listed here: * Bidirectional asynchronous serial communication: 4800 baud, 8N1. * Serial interface levels: EIA RS 423 (ie signals swing +/- 5 Volts). * Power input: 4.2 Watts Max. 350 mA @ 11.8 Volts +/- 6%. (NOTE: This is the value quoted in the manual, but I measured 30 mA on a working LK201. Perhaps the 350 mA is the maximum the computer can supply?) LK201 Connector Pinout The pinout of the connector on the LK201 and on the computer in jpeg and postscript form are linked below. * LK201 Connector Diagram (jpeg 29k) * LK201 Connector Diagram (postscript 12k) |----- data -> -------------------------------------------| | |-------- <- Power -----------------------------| | | | |------------- GND -------------------| | | | | | |------------- <- data -----| | | | ------------------- ------------------- | " " " " | | " " " " | | L V G D | | D G V L | | K + N E | | E N + K | | -> D C | | C D -> | | D -> | | -> D | | E L | | L E | | C K | | K C | -- -- -- -- | | | | -- -- -- -- | | | | ------- ------- Looking into the Looking into the DECstation LK201 Connector Connector (Socket on keyboard) (Socket on DECstation) The LK201 cable is the same used for most telephone handsets. ----------------- VGA Connector Standard 15 pin D-Sub VGA connector pinout ___________________________________________________ \ / \ 1 2 3 4 5 / \ / \ 6 7 8 9 10 / \ / \ 11 12 13 14 15 / \_____________________________________/ Pin # Description 1 Red Video 2 Green Video 3 Blue Video 4 Sense 2 (Monitor ID bit 2) 5 Self Test (TTL Ground) 6 Red Ground 7 Green Ground 8 Blue Ground 9 Key - reserved, no pin 10 Logic Ground (Sync Ground) 11 Sense 0 (Monitor ID bit 0) 12 Sense 1 (Monitor ID bit 1) 13 Horizontal Sync 14 Vertical Sync 15 Sense 3 - often not used ----------------- Monitor/Keyboard Connector info from the FAQ Q31. Can anyone out there tell me the pinout for the monitor/keyboard connector on a DecPro 350? From "The Professional 300 Series Technical Manual", I have (p. 8-5): J1 Pin-outs for the monochrome monitor: 1-3 not used 4 Ground ( video signal ground potential ) 5,6 Ground ( operational voltage ground potential ) 7,8 +12 Vdc ( operational voltage input ) 9-11 not used 12 M Video ( composite video ) 13 Ground ( tied to 5 and 6 ) 14 Data Receive ( serial data line from the keyborad output to the system box, via J3 ) 15 Data Send ( serial data line from the system box output to the keyboard, via J3 ) J3 pin-outs, for the keyboard: 1 Data Send ( via J1, pin 15 ) Serial line for output from the system box to the keyboard 2 +12 Vdc ( output of operational voltage to the keyboard ( from J1, pins 7 and 8 ) 3 Ground (from J1, pins 5,6,13) Operational voltage ground. 4 Data Receive (via J1, pin 14) Serial line for input from the system box. I could not find equivalent information about a VR241 ( color ) monitor. However, there must be some relation, as the Extended Bitmap Option board can drive either, without hardware changes. You might be able to get more out of the manual if you can obtain one: The ordering or part number is: EK-PC350-TM-001 John Erbland erbland@hartford.bitnet Hubert Bartels hgb@catalina.opt-sci.arizona.edu ************************** Q32. What is the pinout for the video port? Professional 380 video-port pinout: Pin: Description: 1,2,3,4,5,6 Ground 7,8 +12 Volts 9 Blue 10 Green 11 Red 12 Monochrome 13 Monitor Present (don't know what it's for, or where it has to be connected to.) 14 Keyboard transmit 15 Keyboard receive I got this info from our local DEC branch. I had to build my own cable and it works fine. Arno Griffioen v882246@si.hhs.nl ------------------- The monochrome video signal is close to composite NTSC and a standard NTSC video monitor is likely to work as a display. A NEC Multisync (the original) works quite well. Connect monochrome output to green input. Set monitor to analog mode. Monochrome output includes composite sync. Green input is sync-on-green. ------------------- A jumper from Monitor Present to ground is necessary for the ROM's to detect that a keyboard and monitor are attached. It seems to skip the keyboard tests if the jumper is not present, but it hangs when a keyboard is attached and the jumper is not present. ------------------- This, from the Pro 300 series Technical Manual page 5-8: The console DL is included as a maintenance feature. Physically it is the same port as the printer port. The printer port can be made to simulate a standard console interface. When a terminal is connected to the port instead of a printer, the address decoder reconizes the console addresses 17777560-17777566. In this mode the port programs like a DL serial device with a receiver CSR, a receiver data buffer, a transmitter CSR, and a transmitter data buffer. Accesses to these registers when a terminal is not connected to the port result in reads of all zeros and writes with no effect. All the printer port registers 17773400-17773406 are always available. When pins 8 and 9 of the printer port connecter J6 short, the hardware determines that a terminal is connected to the port. When using the port for a printer, a printer port cable (PN BCC05) should be used (the cable does not short pins 8 and 9).... ------------------- The pin assignment of DEC 9 pin serial line connectors is different from IBM PCs 9 pin serial line connectors. The PRT1 Serial Printer Interface Connector J6 has the following layout: 1 protective ground 2 Transmit data 3 Receive data 4 Not used 5 Data terminal ready 6 Data set ready 7 Signal ground 8 Ground 9 Terminal A connection between 8 - Ground and 9 - Terminal changes this interface to the console port. Pin 4 is an imput that is part of the factory testing functions. It is shown on the diagrams as LOST which means "Loop On Self Test". It should be grounded to change its state. ------------------- Megan would probably know for sure. But I just dug out my old RT-11 manuals, verified that there is no SJ monitor for the PRO, and (baring any typos) the following files must be on the PRO system disk to boot: SWAP.SYS RT11FB.SYS or RT11XM.SYS DW.SYS or DWX.SYS DZ.SYS or DZW.SYS PI.SYS or PIX.SYS LS.SYS or LSX.SYS KED.SAV MACRO.SAV SYSMAC.SML LINK.SAV PIP.SAV DUP.SAV DIR.SAV It also lists DEMOBG.SAV and DEMOFG.SAV, which are for the test. And I suspect that KED, MACRO, SYSMAC, and LINK are also required for the test. And I suppose you could RUN without PIP, DUP, and DIR, but not do very much. I've always run the RT11XM monitor on my PRO, as they all have the memory, and the XM monitor will relocate some of the code up into XM, leaving more low memory free for my use. ------------------- When making a bootable RX50 for the Pro in a microPDP-11 use: COPY/BOOT:DZ DU1:RT11FB.SYS DU1: This will put DZ into the boot sector instead of DU. ------------------- The RX50 floppy starts at track 1. Track 0 is logically placed after track 79. The sectors are interleaved 1, 3, 5, 7, 9, 0, 2, 4, 6, 8, 10. The track shift and interleave must be taken into account when moving disks between real PDP-11 and emulators.