test-drb

test-drb@ccmp.vtda.org

101090 discussions

microcode store (was Re: Looking to get into a MiniComputer...)

by mark.kahrs＠gmail.com

Let me add that the PDP 11/44 was microcoded... Specifically, it was used by CMU to do C.mmp and Cm*. The microassembler was the Most Unlikely excuse for a MicroassemBLEr (MUMBLE), written by none other than some guy named James Gosling. Somehow I ended up with a listing of MUMBLE and the microcode --- I sent that to the CHM. Mark.

12 years

microcode store (was Re: Looking to get into a MiniComputer...)

by seefriek＠gmail.com

On Jul 29, 2014, at 12:13 PM, Chuck Guzis <cclist at sydex.com> wrote: > Which brings up an interesting question--how many other machines shrunk their instruction set during the course of evolution, rather than the other way around? The MC68060 shed a number of integer mul/div, FP transendentals, and some variants of conditional MOVE instructions that the MC68040 implemented, as well as some privileged mode instructions like PTEST. I'm sure there are others I've forgotten. Motorola provided exception handling software that would emulate (many) of the unimplemented instructions. MicroVAX dropped BCD instructions. So, I think, did x86_64. KJ

12 years

Easy way to get your serial based machines on TCP/IP, Amiga and Apple IIGS

by slandon110＠gmail.com

So ive been dabbling alot with linux, And ive devised a way to get your older machines online via serial. To start you need a null modem cable or adapter A TCP/IP Stack on whatever machine you decide to run on that supports PPP. I run MiamiDX on the Amiga 2000, and Marinetti on the Apple IIGS. Client Setup is like this IP address: Gateway: the IP address of your linux box DNS: use the DNS servers of your ISP or use google public DNS Basically all you need to do is install pppd in your favorite linux distribution. Then create a shell script that looks like this, Replace ttyUSB0 with whatever serial port you are using. Replace 192.168.1.105 with the IP address of your system, then replace 192.168.1.106 with the IP address you plan to give your client system. #!/bin/bash sudo pppd debug -detach proxyarp persist 192.168.1.105:192.168.1.106 ttyUSB0 19200 Then fire up your client machine and you should be able to get right online :) Im going to do this on a RaspberryPi next so I can have a nice small box to do what I need.

12 years

Tektronix VT220 compatible keyboard - information needed

by grif615＠mindspring.com

Yup... grey hair just bit again:-) <div>-------- Original message --------</div><div>From: Ian McLaughlin <ian at platinum.net> </div><div>Date:07/29/2014 9:39 AM (GMT-08:00) </div><div>To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> </div><div>Subject: Re: Tektronix VT220 compatible keyboard - information needed </div><div> </div> On Jul 29, 2014, at 9:24 AM, Grif <grif615 at mindspring.com> wrote: > Vt220 did REGIS graphics. Character and special character based. DEC VMS days The VT220 (my all-time favourite terminal) didn't do ReGIS, but the VT240 did. Ian

12 years

ADM-1 wiki entry updated

by legalize＠xmission.com

I seem to recall someone asking about ADM-1s here recently. The reference manual just showed up on bitsavers so I was able to update the page a bit. <http://terminals.classiccmp.org/wiki/index.php/Lear_Siegler_ADM-1> -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://ComputerGraphicsMuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://LegalizeAdulthood.wordpress.com>

12 years

NorthStar Horizon Bootstrap Assistance

by ian＠platinum.net

Hello All, I've mentioned before that I'm bringing a NorthStar Horizon back to life. I've managed to get quite far, with a fully functional 32K machine running (the second 32k board has an unknown problem at the moment). I've used Dave's NSI utilities to create a CP/M boot disk, which is now working. CP/M is able to format disks, etc. The problem I'm having now is getting other CP/M utilities in to the machine. I'm thinking that KERMIT is a good tool to get in, because once I've got that, I can use serial to transfer anything else I want. I'm trying to follow the kermit-80 documentation about getting a couple of HEX files in to the machine then using MLOAD to merge them and create the binary. The problem I'm having is that the main kermit hex file (CPSKER.HEX) is 70k in size. I've tried both the bootstrap ASM that comes with kermit, as well as using pip, but as soon as I hit the buffer size and a disk write happens, I get a buffer overflow and the transfer breaks. Does anyone have any ideas? I'm thinking that if I could get the kermit binary (or even the hex files) on to a CP/M formatted NSI image, I could bootstrap that image over. Does anyone have a binary for kermit for the Northstar Horizon? Is anyone able to create an NSI image (double density single sided) that contains this binary, or the two HEX files in it? Or is there some magical incantation that I might be missing? I've got a very limited subset of programs on the CP/M boot disk: A>dir A: MOVCPM COM : CONFIG COM : ASM COM : COPY COM A: FORMAT COM : FILECOPY COM : DDT COM : ED COM A: LOAD COM : PIP COM : STAT COM : SYSGEN COM A: SAVEUSER COM : SETCPM COM : SUBMIT COM : XSUB COM A: DUMP COM : DUMP ASM : MEMR COM : MEMR DOC A: HORUSER ASM : USER ASM : DISKDEF LIB : READ-ME DOC A> Thanks in advance for any assistance!!! Ian

12 years

IBM keyboards

by sales＠elecplus.com

These are in my stock, prefer to keep shipping in the US, if possible. Good old clicky keyboards! Also IBM XT and AT available. All are complete, or I will notify you if they are not. None have been tested. No visible damage, cracked cases, etc. PN Qty 1386887 1 1390120 3 1390131 1 1390702 1 1390940 1 1391401 6 1391472 2 1394204 1 1394540 1 1395300 1 1396790 1 4176191 4 6052141 2 6110668 1 8184692 2 42H1292 2 51G8572 2 52G9658 2 52G9700 4 60G0817 2 71G4644 4 82G2383 3 82G3295 1 KB-7563 1 KB-8923 1 KB-9930 1 Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-792-3400 phone 830-792-3404 fax sales at elecplus.com AOL IM elcpls

12 years

Looking to get into a Mini Computer, PDP or something Like that

by slandon110＠gmail.com

Hey guys, kind of burnt out on the micro computer stuff, I want something that will challenge me. So im looking for a Mini computer of some sort, PDP or something along those lines, a vaxstation seems interesting too. Ill be at VCFMW Let me know what you got, and what you think is best, Im kind of a noob to them. Steve

12 years

PDP 11/40E and microcoding

by mark.kahrs＠gmail.com

I thought I'd change the subject line. Eric is of course correct, it's the 40 and not 44. I've had the 44 on my mind lately. The details of the 40E were given in an internal CMU report. This was poorly scanned by CMU and is available here: http://repository.cmu.edu/cgi/viewcontent.cgi?article=3241&context=compsci (and a hat tip to Paul Birkel for pointing this out). I will rescan the figures when I get my copy back from "interlibrary loan"). Wonder what happened to all that microcode written for Hydra???

12 years

Looking for a PDP 11/23, MicroPDP or some sort of Vax

by slandon110＠gmail.com

Well ive done alot of reading up on minicomputers and I think a PDP 11/23 would be fun to work with, or a MicroPDP, Also looking for a Vax to play with. Ill be at VCFMW, so if I could find there that would be great :)

12 years

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