test-drb August 2005

test-drb@ccmp.vtda.org

227 participants
528 discussions

by jrkeys＠concentric.net

That signed copy of "Design of a Computer Control Data 6600" came in the mail Friday as gift, someone paid the $125 for it. I started reading it late Friday and looking at the pictures. :-) John

18 years, 11 months

TMSCP bootstrap

by aek＠bitsavers.org

Until a MU prom can be found, this may help. -- In article <33299DEC.2DB7 at ix.netcom.com>, Bill Hockridge <beh_inc at ix.netcom.com> wrote: >I'm looking for the bootstrap loader code to boot a PDP-11/70 from a >TU-81 plus tape drive (M8739 controller card). > >Does anyone have access to the loader code or know where I can find it? Below are some responses that Robin Birch collected and then forwarded to me when I asked a similar question. These form the very first entries in an archive of bootstraps that is available at http://sunsite.unc.edu/pub/academic/computer-science/history/pdp-11/ bootstraps The original attributions for the bootstraps below belong with BSD 2.x (through Steven Schultz) and RT-11 (through Bob Schor). Tim. (shoppa at triumf.ca) ----------------cut here--------- Here's the TMSCP togglein routine. You start depositing at location 01000. The source is included. as -o a.out tk.s strip a.out dd if=a.out of=b.out bs=16 skip=1 od b.out The 'dd' is needed to removed the a.out header. Enjoy. Steven #! /bin/sh # This is a shell archive, meaning: # 1. Remove everything above the #! /bin/sh line. # 2. Save the resulting text in a file. # 3. Execute the file with /bin/sh (not csh) to create: # b.od # tk.s # This archive created: Sun Jan 21 14:06:24 1996 export PATH; PATH=/bin:/usr/bin:$PATH if test -f 'b.od' then echo shar: "will not over-write existing file 'b.od'" else cat << \SHAR_EOF > 'b.od' 0000000 000000 000000 000000 000000 000000 000000 000000 000000 * 0001000 005701 001002 012701 174500 005021 012704 004000 005002 0001020 105022 020204 103775 010705 062705 000234 005711 100002 0001040 005741 000762 030411 001772 012511 006304 100367 012737 0001060 000400 002102 012737 000044 002100 010037 002110 012737 0001100 000011 002114 012737 020000 002116 012702 002004 012722 0001120 002020 010203 010422 012722 002104 010422 014102 005713 0001140 100776 105737 002032 001320 012702 002114 012722 000045 0001160 012722 020002 005022 005022 005022 010413 010437 002012 0001200 011102 005713 100776 105737 002032 001276 012702 002114 0001220 012722 000041 012722 020000 012722 001000 005022 005022 0001240 010413 010437 002012 011102 005713 100776 105737 002032 0001260 001253 005007 100000 002004 000000 000001 0001274 SHAR_EOF fi if test -f 'tk.s' then echo shar: "will not over-write existing file 'tk.s'" else cat << \SHAR_EOF > 'tk.s' . = .+ 01000 / TMSCP bootrom code. / R0 = Unit to boot from / R1 = CSR of controller (0 if default 174500 to be used) start: tst r1 bne rewind mov $174500,r1 rewind: clr (r1)+ / start tk init sequence / move pointer to tksa register mov $4000,r4 / state test bit to step 1 clr r2 / clear bottom 4000(8) bytes 1: clrb (r2)+ cmp r2,r4 blo 1b mov pc,r5 / position independent address add $cmdtbl-.,r5 / of init seq table 2: tst (r1) / error ? bpl 1f / no - skip the backup tst -(r1) / put CSR back to entry value br rewind / might as well go try again 1: bit r4,(r1) / current step done ? beq 2b / no mov (r5)+,(r1) / yes, load next step info from table asl r4 / change state test bit to next step bpl 2b / if all steps not done, go back / r4 now = 100000, TK_OWN bit mov $400,*$cmdhdr+2 / tape VCID = 1 mov $36.,*$cmdhdr / command packet length / don't set response packet length, / little shakey but it works. mov r0,*$unit / set unit in packet mov $11,*$tkcmd+8. / on-line command opcode mov $20000,*$tkcmd+10. / set clear serious exception mov $ring,r2 / initialize cmd/rsp ring mov $tkrsp,(r2)+ / address of response packet mov r2,r3 / save address "ring+2" mov r4,(r2)+ / set TK owner mov $tkcmd,(r2)+ / address of command packet mov r4,(r2)+ / set TK owner mov -(r1),r2 / start TK polling 3: tst (r3) / wait for response (ring+2) bmi 3b tstb *$tkrsp+10. bne rewind mov $tkcmd+8.,r2 mov $45,(r2)+ / reposition opcode mov $20002,(r2)+ / set rewind & clear serious exception clr (r2)+ / clear record/object count clr (r2)+ / zzz2 clr (r2)+ / clear tape mark count mov r4,(r3) / set TK owner of response (ring+2) mov r4,*$ring+6 / set TK owner of command mov (r1),r2 / start TK polling 1: tst (r3) / wait for response (ring+2) bmi 1b tstb *$tkrsp+10. / does returned status = SUCCESS ? bne rewind / no, hang mov $tkcmd+8.,r2 mov $41,(r2)+ / read opcode mov $20000,(r2)+ / set clear serious exception mov $512.,(r2)+ / byte count clr (r2)+ / zzz2 clr (r2)+ / buffer address is 0 mov r4,(r3) / set TK owner of response (ring+2) mov r4,*$ring+6 / set TK owner of command mov (r1),r2 / start TK polling 1: tst (r3) / wait for response (ring+2) bmi 1b tstb *$tkrsp+10. / does returned status = SUCCESS ? bne rewind / no, hang clr pc cmdtbl: 100000 / TK_ERR, init step 1 ring / address of ringbase 0 / hi ringbase address 1 / TK go bit end: cmdint = 2000 / TMSCP stuff starts at 1kb rspint = cmdint+2. ring = rspint+2. rsphdr = ring+8. tkrsp = rsphdr+4. cmdhdr = tkrsp+48. tkcmd = cmdhdr+4. unit = tkcmd+4 SHAR_EOF fi exit 0 # End of shell archive ------------------------------------------------------------------------ ---- TMSCP Bootstrap RT-11 Installation Guide (AA-H376F-TC) Toggle the following instructions into memory, starting at address 076026 (the last instruction goes into 076176). When done, check to make sure all addresses have the correct content, then start running from 076026. Note that this asssumes that a bootable tape is loaded in the MU: device. 076100 100077 076102 105237 076104 100075 076106 010037 076110 100104 076112 112437 076114 100115 076116 112437 076120 100110 076122 010522 076124 010522 076026 005000 076126 012722 076030 012701 076130 100100 076032 174500 076132 010512 076034 012704 076134 024242 076036 076160 076136 005711 076040 012705 076140 005712 076042 004000 076142 100776 076044 010102 076144 005737 076046 012422 076146 100012 076050 005712 076150 001331 076052 100770 076152 105704 076054 031205 076154 100344 076056 001774 076156 005007 076060 012412 076160 046525 076062 006305 076162 100000 076064 100371 076164 100200 076066 010502 076166 000000 076070 005022 076170 000001 076072 105702 076172 004400 076074 100375 076174 020476 076076 105237 076176 020402

18 years, 11 months

Fwd: Rescue for a Toshiba T250 computer, CP/M, N. Chicago

by jfoust＠threedee.com

>From: "Dave Bradshaw" <dave at fishmonger.com> >To: <jfoust at threedee.com> >Subject: Toshiba T250 computer >Date: Fri, 12 Aug 2005 10:32:06 -0500 > >Hi John, > >In 1998 I exchanged emailed with you briefly regarding several thousand files residing on a Toshiba 8080 (?) based CP/M computer model T250 that I wanted to transfer to Word. I procrastinated as long as I could, but I finally got everything moved over to my Windows XP system. > >At the time you asked me what I was going to do with the system, so I thought I would offer it to you before I put it up on eBay. I am located in the northern Chicago suburbs. > >Here is a description: >Toshiba T250 CP/M 8080 (?) based micro computer >Two 8? DD DS floppy drives (1MB capacity per drive) >Parallel Port (built in cable) >RS-232 Serial Port (built in cable) >CP/M 64K Version 2.20 >Original Manuals >CP/M Primer Book > >I also have about 100 diskettes, some new, most used, but all formatted and functional. Software includes: >CP/M V2.12 >CP/M V2.20 >PMATE 3.02 Text Editor. Licensed copy with manuals and source code for compile >Magsam-E ISAM File Utilities >The usual CP/M stuff: CBASIC, STAT, PIP, and Disc Utilities >A freshly compiled version of Kermit that I used to do all of the file transfers over the last 2 weeks > >I am the original owner, and bought the machine some time in early 1982. Everything is 100% functional and in good working order. > >I look forward to hearing from you. >Dave Bradshaw >DDD >847-501-6570 ><mailto:dave at fishmonger.com>dave at fishmonger.com >

18 years, 11 months

Free Grinnell Frame Buffer Graphics for PDP-11

by hardware＠ees1s0.engr.ccny.cuny.edu

Dear Classiccmp Community, I have a Grinnell GMR-270 frame buffer for a PDP-11 to give away. It was given to me as working, but I cannot test it since I do not currently have a working PDP-11 system. It provides color 512x512 output to a monitor, which a included. Also included is the original documentation, which includes technical data and programming information. It seems that it can also act as a frame grabber. It has hardware pan/zoom functionality. It is a regular 19" rack unit, approximately a cube, and weighs around 40 pounds. I am in New York City. If you want it, come and get it. thanks, -kurt

18 years, 11 months

ImageDisk update

by dave04a＠dunfield.com

Hi Jules, >Just to clarify, does this need any particular disk controller chip (or >emulation thereof) to work? Or does it somehow get around the problems >which 99% of PC floppy controllers seem to have in reading certain disks >(particularly FM data)? ImageDisk works with the standard Nec765 based PC controller, preferably an AT or higher on which the data rate can be set. This has all the limitations inherent in many PC implementations. In testing about a dozen machines, I've found three which can read AND write mixed density disks without complaint. The FDCs on Intel mainboards appear to be quite good if you can live with the fact that they couldn't be bothered to provide a Drive-B select on the interface connector. >(one for the website, or the bundles readme.txt file maybe!) All of this information (and more) appears in ImageDisks online help. Regards, Dave -- dave04a (at) Dave Dunfield dunfield (dot) Firmware development services & tools: www.dunfield.com com Collector of vintage computing equipment: http://www.parse.com/~ddunfield/museum/index.html

18 years, 11 months

PDP-11 Diagnostic Handbook

by aek＠bitsavers.org

If you use XXDP, you want a copy of this. http://www.bitsavers.org/pdf/dec/pdp11/xxdp/ PDP11_DiagnosticHandbook_1988.pdf

18 years, 11 months

(no subject)

by hardware＠ees1s0.engr.ccny.cuny.edu

18 years, 11 months

Possible entertainment for VCF 8.0

by dwight.elvey＠amd.com

>From: "John Foust" <jfoust at threedee.com> > >At 01:17 PM 8/12/2005, Roger Merchberger wrote: >>Boatloads of advertising won't get the general public through the door if there's nothing at the venue they're interested in. > >Precisely. You'd need a gimmick with sufficiently broad appeal >that the insiders would be offended by its simplicity and >lack of sophisticated taste. > >>P.S. How about a Vintage Arcade game section - or at least a Vintage Computer Game section? Any VCF that I'd be able to attend I would be glad to donate a computer or two with classic games for folks to play... Just a [prolly bad] thought... > >VCF did team up with the California Extreme show in 2000, no? > >- John > Hi Maybe we need a contest giving away an Apple 1 ;) Dwight

18 years, 11 months

Super Jolt on ePay

by leeedavison＠yahoo.co.uk

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=5230100293 I've not seen one of these listed before. The auction says .. "Seems to be in Very Good Condition, No Obvious Damage! Has one EPROM installed" What it doesn't say is that it's had the two 2114 RAM chips removed so it isn't going to work as is. Lee. . ___________________________________________________________ How much free photo storage do you get? Store your holiday snaps for FREE with Yahoo! Photos http://uk.photos.yahoo.com

18 years, 11 months

voice coil and heads available from unknown drive

by jwest＠classiccmp.org

See picture at www.ezwind.net/jwest picture should be voicecoil.JPG I think this came from a CDC drive, not sure. There are 4 sets of heads on this voicecoil plus a glass reticule track indicator. Head sets 1 & 3 are lined up vertically, head set 2 is off to one side. Then is the glass reticule, and then a 4th set of heads still further off to one side. If someone knows what this is, perhaps they could use the heads. Cost = Shipping. If no one wants it, it will get pitched tomorrow. Jay

18 years, 11 months

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test-drb August 2005