well, pdp11/34 don't boot :( same problem. so here i want to describe anything i can. CPU boards: slot conn option module addr vect ------------------------------------------------------------ 1 a-f cpu m8266 n/a n/a 2 a-f cpu m8265 n/a n/a 3 c-f ky11-lb m7859 n/a n/a 4 a-b boot m9312 4 c-f dl11-w m7856 177560 60 5 a-f ms11-ld m7891 6 a-f rl11 m7762 174400 160 7 c-f rx211 m8256 177170 264 8 c-f dl11-wc m7856 176500 300 9 a-b unibus m9202 9 c-f u/q bim?(*) m8217 10 a-b unibus m9202 10 c-f convert. m7066 11 a-f generat. m7067 12 a-f bitmap m7068 13 a-f = = 14 a-f = = 15 a-f = = 16 17 18 a-b uni/term m9302 18 c-d video a011 19 a-b-f reg.kw11 m7952 (this is written) (19 a-b ??? m9403 c-f reg.kw11 m7952 this is what i see in CPU) 20 a-b qbus/ter m9400 20 c-f dma cont m8026 21 c-f q-bus cont m8036 22 c-f a/d mur a017 (*) unreadable ------------------------------------------------------------------- well, this is the list as is taped on the CPU cover, compiled by hand. i have verified, and all boards are in the place described here, except (1) So, let's try to boot: ---------------------- 1) turning on the chassis 2) turning on the RX02 floppy module, from rear switch 3) pressing WRITE PROT and turning on the RL02 DISK module, from rear switch 4) turning on the CPU module, from rear switch 5) checking that disk is UNLOADED (LOAD unpressed).. at this time, all 4 RL02 lights are turned ON: LOAD, 0 READY, FAULT and WRITE PROT. 6) turning on main CPU from frontal knob (from DC OFF to DC ON): fan & rumors, "DC ON" red led led on. inside the cpu: - RED led on M7891 board on (this led, identified as "D3" on my schemes, is described as "PAR ERR INDICATOR", connected to pin 6 of E33, a 74S74. - The green led on the board is OFF. looking at the board, i can see that is JUMPERED! so, it CAN'T turn on ... someone know why ? - in every restart, the display show a different number (this is normal, i think) - RL02 Lights status: LOAD is on, 0 READY is off, FAULT is off and WRITE PROT is on. 7) pressing LOAD, the LOAD light turn OFF, the disk will spin up and after about 30 seconds the "0 READY" white light turn on. 8) pressing "CTRL-BOOT" on the CPU CONSOLE will flash FAULT lights on RL02 just for an istant, and after this nothing happen: - RL02 lights status is : LOAD off, READY on, FAULT off, WRITE PROT on. - CPU show "165504" and RUN led is off. BUS ERR led is off. MAINT is off, the only led on is "DC ON". 9) pressing again CTRL-BOOT obtain the same effect. during this, nothing happen on serial console. ------------ Booting manually (inserting the octal code to boot from RL02): this is the boot code, found in "E-10 Loading Software Bootstrap": location contents 001000 012701 001002 174400 001004 012761 001006 000013 001010 000004 001012 012711 001014 000004 001016 105711 001020 100376 001022 005061 001024 000002 001026 005061 001030 000004 001032 012761 001034 177400 001036 000006 001040 012711 001042 000014 001044 105711 001046 100376 001050 005007 HORRIBLE NEWS: ============== i wrote stuff in 001000, and i read OTHER THINGS. so i can't manually boot!!! writing 111111,222222,333333,444444,555555,666666,777777, i read 000111,000000,000110,000440,000101,002640,000100 but i read every time different contents :((( maybe i have to add the bootstrap code in a different location? maybe the 7891 board is totally broken ??? maybe the problem was the substitution of the SN74LS175N with an hitachi HD74LS175P ? HELP!!! ============================================================== Photos of boot sequence, chips, schematics details and something can be seen on http://www.freaknet.org/asbesto/pdp11. sorry for the bad quality but they was taken from a color quickcam. we are working on a pdp11 section of www.freaknet.org to collect any useful information. any help will be appreciated (and ... maybe .. any SPARE PART :) -- [asbesto : freaknet medialab : radio#cybernet : GPG key on keyservers] [ MAIL ATTACH, SPAM, HTML, WORD, and msgs larger than 95K > /dev/null ] [http://www.freaknet.org/asbesto IW9HGS http://kyuzz.org/radiocybernet]