test-drb April 2007

test-drb@ccmp.vtda.org

257 participants
560 discussions

by ajp166＠bellatlantic.net

> >Subject: Re: Hand-rolling a CP/M machine > From: Jim Battle <frustum at pacbell.net> > Date: Fri, 27 Apr 2007 20:46:08 -0500 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > >woodelf wrote: >> Allison wrote: >> >>> You have to be kidding me. All you need is a 2764 and a programmer. >>> It's a ROM and the pattern is in the manual, what could be easier? >>> Actually if someone were building I'd suggest using a 2764 over the >>> part used on the VDM1 as that was a two or three voltage part and >>> 27C64(or even a 27C256) is common as flies plus lower power. >> >> Well if I still had the manual let alone the the VDM ... :( > >The ROM images are available as C character stucts in my Solace >emulator. According to the manual, the Sol was sold with two different >characters sets (I don't know if that is true or not). Both are >available at: > > http://www.sol20.org/solace.html > >Download the source. Look in charset_6574.c and charset_6575.c The answer is true. the difference in the charsets is what the non-ascii mapped chars look like. (symboles and arrows and other neat glyphs.). Allison

19 years

Good news: The MSCP SCSI 1.2 board booted VMS6.1 CD!

by vax9000＠gmail.com

Good news! Minutes ago the MSCP SCSI 1.2 board booted VMS6.1 CD. It booted to a $ prompt and I did not know what to do next. It is a pity that I left my camera in my office and could not record this moment. :) vax, 9000

19 years

HP54615B powersupply?

by jimmi＠satlantic.com

hello. did you ever fix this scope? james

19 years

Good news: The MSCP SCSI 1.2 board booted VMS6.1 CD!

by cheri-post＠web.de

> Good news! > Minutes ago the MSCP SCSI 1.2 board booted VMS6.1 CD. > It booted to a $ prompt and I did not know what to do next. Easy, just sit there and enjoy the upcome of the prompt-sign :-) Good work !!! Pierre _______________________________________________________________ SMS schreiben mit WEB.DE FreeMail - einfach, schnell und kostenguenstig. Jetzt gleich testen! http://f.web.de/?mc=021192

19 years

disassembling STacy with a SLEDGEHAMMER.

by aliensrcooluk＠yahoo.co.uk

If you do take a hammer to it (hope you dont) perhaps you can video it so that we can learn from it. I know i learnt a little about harddrives from one on YouTube, even if the guy messing with it damaged it. - Andrew B (via mobile phone) --- cctalk-bounces at classiccmp.org <spectre at floodgap.com> wrote: > I am about ready to take my #10 sledgehammer to this benighted piece of junk. > How in all that is holy do you get it apart? I've got all the screws out, > got all the snaps up on the lower part and the top half seems to float off > except for something in the middle of the board I can't see that's holding it > on. I think it's the cabling to the LCD, but I can't get the display apart > either! Most of the snaps are off, but I can't undo the root. > > Any suggestions, before I disassemble the unit using the fragmentation > method instead? > > -- > ------------------------------------ personal: http://www.cameronkaiser.com/ -- > Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com > -- The moon may be smaller than the Earth, but it's farther away. -------------

19 years

Junkbox CP/M system?

by ajp166＠bellatlantic.net

> >Subject: Re: Junkbox CP/M system? > From: "Ensor" <classiccmp at memory-alpha.org.uk> > Date: Tue, 24 Apr 2007 05:16:45 +0100 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >Hi, > > > > > CF IDE is easy--it's 8 bit. HD IDE uses a 16-bit data path for > >sector data transfer.... > >The original IDE drives used 8-bit transfers (I had one in my first XT), >even to this day there is still be a signal on the IDE interface to force >the use of 8-bit mode. It's rarely implemented and its not a "line" it was part of the command set. The line IO16 is an output that goes high when sector transfers happen. I have a few XT IDE and of the 4 only one drive (20mb) does 8bit the rest depend on the ISA bus card to do translation (8-16). > >At least one of the IDE interfaces available for 8-bit Atari machines uses >the drive in this mode. > > > TTFN - Pete. What drive? YOu can of course use CF that has 8bit mode or just ignore the high 8bits (loose half the space) for a simpler interface. Allison

19 years

Acorn Second Processors (was: Re: Quick survey on equipment)

by classiccmp＠memory-alpha.org.uk

Hi, >> Think I'll just get a Z80 Second Processor for my Beeb >>instead (far less hassle). > > I didn't think those were _that_ common... Ooer, don't say that....there used to be *lots* of them at radio rallies, but I haven't been to one for a couple of years (planning on doing Elvaston Castle this year though). I suppose I could always make one, assuming the necessary ROM images are available somewhere? I don't recall there being any custom logic in the 6502 Second Processor and my memory of the Torch Z80 2nd processor is waaay to hazy. Which brings me onto a second point. I actually have at least one BBC "Master" too, I have a vague recollection that these have a connector for an internal, as well as an external, second processor? Do you know of any websites where I could get more info? TTFN - Pete.

19 years

Hawthorne 68000 SBC page

by rcini＠optonline.net

All: For those who might be interested, I started an information page on the 68k SBC that I received last week. http://highgate.comm.sfu.ca/~rcini/classiccmp/ht68k.htm I have all of the manuals copied but I haven?t started scanning it yet. I will probably try to do some tomorrow., and I?ll try to take a picture or two. Rich -- Rich Cini Collector of Classic Computers Build Master and lead engineer, Altair32 Emulator http://www.altair32.com http://highgate.comm.sfu.ca/~rcini/classiccmp

19 years

ET-3400 ROM adapter

by whipaway＠yahoo.com

Someone was looking for the ET-3400 ROM adapter, See http://www.swtpc.com/mholley/ROM_Emulator/UsersGuide.pdf Be careful, it looks like pin 11 (CS1) has been masked to be active low, so use the spare gate on the 7420 as an inverter. --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check outnew cars at Yahoo! Autos.

19 years

Hand-rolling a CP/M machine

by ajp166＠bellatlantic.net

> >Subject: Re: Hand-rolling a CP/M machine > From: woodelf <bfranchuk at jetnet.ab.ca> > Date: Wed, 25 Apr 2007 13:24:17 -0600 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > >>> You can copy the screen logic for TRS80 as that is a basic 64x16 as well. >> Good thing to keep in mind. > >Well if anybody is doing VDM-1's the big problem is that you can't find >the Character ROM any more. I like the idea of TTL display like VDM-1 >but since this is not the late 70's a 80x24 screen is reasonable >and the data out is a simple VGA format, since the monitors are easy to >come by. You have to be kidding me. All you need is a 2764 and a programmer. It's a ROM and the pattern is in the manual, what could be easier? Actually if someone were building I'd suggest using a 2764 over the part used on the VDM1 as that was a two or three voltage part and 27C64(or even a 27C256) is common as flies plus lower power. Allison

19 years

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test-drb April 2007