russian PDP-11 like K1801BM2 CPU Startup reading w/o address?

confimation I have just examined on a real BK0010 using Mirage the debugger the msbyte of the address 177716 is always 100 whatever you do (as I can see),the lsbyte varies but not the msbyte ,so the principle that the starting address of the processor is made od the msbyte of address 177716+000 for lsbyte.100+000 gives an adress of 100000,type g100000 in the debugger makes a good clean start of the machine.I think it is a register in the support circuit k1801BM1-014 best regards a.n ----- Original Message ----- From: "nierveze" <nierveze at radio-astronomie.com> To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> Sent: Saturday, December 10, 2011 11:26 AM Subject: Re: russian PDP-11 like K1801BM2 CPU Startup reading w/o address? >hello,the startup procedure of those processors is rather >sophisticated,here here is what I have found: >first it is for the k1801BM1 and BM2: >*at beginning if times everything is at zero....(DCLO,ACLO are low) >*when you apply power to the processor and the clock the clock starts >immediatly and the processor begins to count clock states also >*DCLO must be low for 5 ms at least ,during this time the processors >clears the registers,that contain random data at powerup,at the end if >this period internal INIT goes hight ,the processor begins to work >*ACLO should be low for 70 ms >*after there arre differences in the processors: >*the 1801BM1 find the msb of the pc from address 177716(selected by >SEL1),the lsb of >the pc is filled with zeroes,this forms the starting address .Ths PSW is >filled with value 340.This addres is in the I/O page,maybe it can be >physically in a small rom, >a register bank ,or in support circuit??? >*for the1801BM2 the msb of the pc from a non address register (maybe a >74ls 244 programmed by a bank of switches as in the case of the >T11),selected by SEL ,the lsb is filled by zeros ,this fixes the >starting >address in rom,the PSW is found at this addess +2 >Here is what I have found ,my russian knowledge is maybe more >poor as hours:-))) >I have understood this from a file found on the site of Serguei >Vakulenko >(vak.ru,page of projects) >You can find here also the pdf of the 1806 ,the successor of those >microprocessors that use a similar startup procedure. >I was not able to understand where those registers are from schematics >of BK0010 or BK0011 because they use support chips whose docs I do not >have . >But the clock of those computers may be used with the timings for the >startup procedure. >Timing and reset circuits can be found in 'personal computers BK -0010 >BK-0011 5/95 ' in the archives of BK >Can you please explain more precisely what you have done??? >Thanks best regards >Alin Nierveze > >----- Original Message ----- >From: "Holm Tiffe" <holm at freibergnet.de> >To: "General Discussion: On-Topic and Off-Topic Posts" ><cctalk at classiccmp.org> >Sent: Friday, December 09, 2011 6:20 PM >Subject: Re: russian PDP-11 like K1801BM2 CPU Startup reading w/o >address? > > >>HI Devin, >> >>In the meantime I've found out whats going on there, I've put that CPU >>on >>a testboard and applied power and clock. >>Nevertheless your links are very interesting, still have many threads >>to >>read on those sites. >> >>Thanks, >> >>Holm >> >>Devin Monnens wrote: >> >>>Holm, >>> >>>I asked one of my colleagues who is working on computer research in >>>Ukraine. He did not have a direct answer to your question, but >>>provided >>>these sources to check for solutions to your problems: >>> >>>http://forum.maxiol.com/index.php?showtopic=4599 - look here >>>http://ramlamyammambam.livejournal.com/149983.html?format=light - ask >>>here or maybe here: >>>http://ru-radio-electr.livejournal.com/229706.html?thread=3609418&format=light#t3609418 >>>- I know user suvorow_ as a good specialist. >>> >>>-Devin Monnens >>> >>> >>>> ------------------------------ >>>> >>>> Message: 14 >>>> Date: Sat, 3 Dec 2011 16:44:24 +0100 >>>> From: Holm Tiffe <holm at freibergnet.de> >>>> To: cctech at classiccmp.org >>>> Subject: russian PDP-11 like K1801BM2 CPU Startup reading w/o >>>> address? >>>> Message-ID: <20111203154424.GA56131 at pegasus.freiberg-net.de> >>>> Content-Type: text/plain; charset=iso-8859-1 >>>> >>>> >>>> I want to play with a russian K1801BM2 CPU (K1801VM2). >>>> My russian from the school is very very rusty and so I have problems >>>> to >>>> understand what's going on with this CPU while startup. >>>> There is some "besadresnoe tschtanie", a read from the bus w/o >>>> sending out an address before w/o active SYNC. >>>> It is right, that this read is building the upper 8 bits from the >>>> start >>>> address in the rom area with Systemu Mode (Halt Mode) = 1? >>>> Can anyone please confirm this? >>>> >>>> BTW: how is this external register to be done in HW? >>>> >>>> Does anyone know if there are schematics of SBCs existing w/o >>>> special >>>> support ICs like The K1801VP1-55 or so? >>>> >>>> Kind Regards and thanks in advance, >>>> >>>> Holm >>>> -- >>>> Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, >>>> Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 >>>> www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741 >>>> >>>> >>>-- >>>Devin Monnens >>>www.deserthat.com >>> >>>The sleep of Reason produces monsters. >> >>-- >> Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe, >> Freiberger Stra?e 42, 09600 Obersch?na, USt-Id: DE253710583 >> www.tsht.de, info at tsht.de, Fax +49 3731 74200, Mobil: 0172 8790 741 >> >