test-drb

test-drb@ccmp.vtda.org

101090 discussions

CP-M Z80 home brew computer circuit board

by cclist＠sydex.com

From: "Andrew Lynch" > Implementing floppy IO can take on many variations and picking the FDC > is just the first of many challenges [FDC1793? NEC765? SMC9266? > WD2797?]. What about the data separator? Few chips remain and viable > sources are scarce. Even integrated FDCs with built in data separators > are not readily available. The WD1770/1772/1773 is still my favorite "almost no external circuitry" chip, but they're getting harder to find, in spite of being used on Atari and Commodore boxes. You don't need to buffer the floppy interface and the things have integrated data separators-- and come in a 28-pin package. I wonder if it might be practical to implement an FDC in a uC or even a CPLD. Common sense might be to use an IDE-interface floppy, such as a Superdrive (again, getting scarce) or implement a USB UHCI to interface to USB floppies (still easy to find). I shudder to think at the effort and space required to implement a USB stack in Z80 code, however. Cheers, Chuck

17 years, 10 months

Apple 1 on eBay

by cclist＠sydex.com

> Date: Sat, 14 Jun 2008 22:27:44 -0700 (PDT) > From: Sellam Ismail > I only know where the ones are that I know of :) I am discovering roughly > 2 new ones out in the wild every year or so, though I expect that trend to > drop off sharply over time as I've already located 42 so far and my > research tells me that there are probably (PROBABLY) no more than 50 still > in existence. I suspect that many of them are still in the Bay Area--I vaguely recall a Homebrew meeting or two where they were being sold to the membership for a substantial discount off the $666.66 retail price. Of course, the S-100 clan didn't think much of the board. After all, it was just a board... Cheers, Chuck

17 years, 10 months

CP-M Z80 home brew computer circuit board

by ajp166＠bellatlantic.net

> >Subject: Re: CP-M Z80 home brew computer circuit board > From: "bfranchuk at jetnet.ab.ca" <bfranchuk at jetnet.ab.ca> > Date: Sun, 15 Jun 2008 11:06:33 -0600 > To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> > >Andrew Lynch wrote: >> -----REPLY----- >> >> Hi! Thanks Jim for the comments. Please let me address the issues raised >> by Ben: >> >> If you look closely at the SBC design, you'll notice it has a feature even >> better than a floppy controller -- it has a fully buffered IO bus! It >> contains all the Z80 signals brought out to the DIN 41612 connector. The >> peripheral bus adheres to the published ECB standard. >> >> If you want floppy IO, the solution is simple -- just design one and attach >> it to the bus! I have already done this with my Disk IO board (IDE and >> NEC765 FDC) which plugs into my home brew ECB backplane along with the SBC. >> Assuming there is enough interest in these home brew SBCs, I hope to make a >> PCB version of the Disk IO board. >> >Well when you get a PCB of the Disk I/O board , I'll take the set of PCB's. >Will a 8272 (intel) Disk controler replace the NEC765? for the floppy >controler The 8272 and 765 are interchangeable and available. If you can find a WD37c65 thats far less pars to implement fdc. Myself I'd suggest to Andrew to not mess with floppy. Everyone has their own idea of what to use and how it should be done and what formats it MUST support. >for the track formatting for CP/M? Unicorn Electronics is my favorite >shopping for electronic parts and I can find a 8272 there. JDRmico has them too. Having done way to many floppy based sytems and having many on hand doing something without the noise, power needs and limited space is a welcome change. Sonmetimes working with cpm is not about floppies but instead the OS itself. Allison > >> >> Yes, this SBC is a slightly modern variation of a vintage Z80 CP/M design. >> I relaxed some of the traditions to make it affordable, reliable, and still >> useful. The P112, while an excellent design and a wonderful SBC, costs $165 >> for a kit when it is available. I know of no other hobbyist Z80 projects >> where one can purchase the PCB. >> >> There are many Z80 designs available, however, without a PCB it means most >> hobbyists will have to use temporary breadboards, wire wrap, or prototype >> boards. None of those lend themselves to long term reliable solutions -- >> especially for a wide range of hobbyist builders. >> >> The SBC PCB is meant to be *low cost* and the *common* element of a home >> brew computer with *simple* IO. Adding unnecessary and complex IO >> peripherals increases PCB area and cost, raises part count, and pushes away >> the hobbyists it is meant for. >> >> Selecting IO has to be done very carefully. Not everyone who builds this >> SBC wants floppy IO. I have had numerous requests for many forms of IO >> ranging from SCSI, IDE, floppy, CF, SD, USB, the Zilog peripherals, etc. >> There is no solution which will satisfy everyone. >> >> Implementing floppy IO can take on many variations and picking the FDC is >> just the first of many challenges [FDC1793? NEC765? SMC9266? WD2797?]. What >> about the data separator? Few chips remain and viable sources are scarce. >> Even integrated FDCs with built in data separators are not readily >> available. >> >> Please remember, this is a *home brew* computer project -- a *real* Z80 >> running CP/M 2.2 on *real* hardware. It is what you make of it. If all you >> want is a PC CP/M emulator then this project is not for you. >> >> Thanks and have a nice day! >> >> Andrew Lynch >> >> >>

17 years, 10 months

big bucks for a Tek computer on eBay

by chrism3667＠yahoo.com

Man it would have been nice to own one of these: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=220243243508&ssPage… or item # 220243243508 apparently 6800 based. O woe is me. 322$ + 90$ shipping. O woe is me. why are these things so rare? sniff

17 years, 10 months

CP-M Z80 home brew computer circuit board

by lynchaj＠yahoo.com

CP/M Z80 home brew computer circuit board bfranchuk at jetnet.ab.ca bfranchuk at jetnet.ab.ca <mailto:cctalk%40classiccmp.org?Subject=CP/M%20Z80%20home%20brew%20computer% 20circuit%20board&In-Reply-To=48546EA0.8000301%40pacbell.net> Sat Jun 14 21:08:23 CDT 2008 * Previous message: CP/M Z80 home brew computer circuit board * Next message: Fwd: Manual "IBM Card" Punch on eBay... * Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] ________________________________ Jim Battle wrote: > > Great, Ben! I look forward to seeing your design. Debug it, document > it, put up a web page, build PCBs, and offer to sell them at cost and > see how many grumbles you get. > Well when you think about it , I can down load a Z80 - CP/M emulator that is just as fast and I can read emulated disks from my PC. When I think CP/M I think floppy disk and I think you still can get the floppy disk controller chips. -----REPLY----- Hi! Thanks Jim for the comments. Please let me address the issues raised by Ben: If you look closely at the SBC design, you'll notice it has a feature even better than a floppy controller -- it has a fully buffered IO bus! It contains all the Z80 signals brought out to the DIN 41612 connector. The peripheral bus adheres to the published ECB standard. If you want floppy IO, the solution is simple -- just design one and attach it to the bus! I have already done this with my Disk IO board (IDE and NEC765 FDC) which plugs into my home brew ECB backplane along with the SBC. Assuming there is enough interest in these home brew SBCs, I hope to make a PCB version of the Disk IO board. Yes, this SBC is a slightly modern variation of a vintage Z80 CP/M design. I relaxed some of the traditions to make it affordable, reliable, and still useful. The P112, while an excellent design and a wonderful SBC, costs $165 for a kit when it is available. I know of no other hobbyist Z80 projects where one can purchase the PCB. There are many Z80 designs available, however, without a PCB it means most hobbyists will have to use temporary breadboards, wire wrap, or prototype boards. None of those lend themselves to long term reliable solutions -- especially for a wide range of hobbyist builders. The SBC PCB is meant to be *low cost* and the *common* element of a home brew computer with *simple* IO. Adding unnecessary and complex IO peripherals increases PCB area and cost, raises part count, and pushes away the hobbyists it is meant for. Selecting IO has to be done very carefully. Not everyone who builds this SBC wants floppy IO. I have had numerous requests for many forms of IO ranging from SCSI, IDE, floppy, CF, SD, USB, the Zilog peripherals, etc. There is no solution which will satisfy everyone. Implementing floppy IO can take on many variations and picking the FDC is just the first of many challenges [FDC1793? NEC765? SMC9266? WD2797?]. What about the data separator? Few chips remain and viable sources are scarce. Even integrated FDCs with built in data separators are not readily available. Please remember, this is a *home brew* computer project -- a *real* Z80 running CP/M 2.2 on *real* hardware. It is what you make of it. If all you want is a PC CP/M emulator then this project is not for you. Thanks and have a nice day! Andrew Lynch

17 years, 10 months

Anyone need a TI Professional PC monitor & video card?

by derschjo＠msu.edu

Picked up what turned out to be a video card & monitor for a TI Professional PC, thinking I might be able to use it in one of my old PCs to experiment with one of the "also rans" of the early PC video card biz :). Unfortunately while it may be ISA compatible (is it?), the card is longer than the standard "full length" and it won't fit into any of my machines. No idea if it works, monitor powers up OK. If you want it, it's yours. It's in the Seattle area. Let me know, Josh

17 years, 10 months

(copy of ) Apple I on ebay

by tonym＠compusource.net

Sounds too dang fishy....too many coincidences... Sold on eBay, bought on eBay, relisted on eBay... Oh - and both in Indiana, and HAPPEN to know each other? Pictures of 2 auctions show same item, except the cassette adapter is washed out on upper-right corner, where it was evident they tried to remove the word "homebrew" and whatever else? Doesn't have any idea on this stuff, and dropped nearly 4 large ($4K) on it? I wouldn't buy an athlete's autograph for over $100 without some 3rd-party authentication, and he drops $4K like that? Selling something as what it's not, such as that, is fraud, and being near $4000, that's Grand Theft and a Felony in every state of our fair country - and he's not worried about losing $4K? Oh, and his buddy "Mark" bought it from him for $1500? Dang - another coincidence - that seller (2nd one, claiming it was real) HIS name happens to be Mark as well, as evidenced by his only current eBay listing, where he answers a question, and putting "~Mark" at the end: http://cgi.ebay.com/RARE-Apple-Computer-Freestyle-Tablet-PowerBook-Laptop_W… Has no idea, no knowledge of the stuff, yet in the auction listing he says he hooked it all up and tested it with an 'ACSII' <sic> keyboard? Come on - a n00b knowing nothing can do that? In the listing, he says it was blown off because it had a thick layer of dust? Hmm...I didn't see that on the FIRST listing...plus, didn't he claim it was in a display case, which was supposedly available for local pickup? Sorry - I don't buy it. Maybe I'm more cynical than most, but that whole string of cr at p is unbelievable. I see too many similarities in completed auctions of BOTH of those eBay ID's. He saw the first listing, saw the clone was local, he bought it, tried to scam it on fleaBay, and he got spanked in his attempt. Thanks to the eagle-eyed honest folks out here, someone did NOT get ripped off. Nice catch, guys! Tony -----Original Message----- From: Evan Koblentz evan at snarc.net Sent 6/15/2008 1:27:35 AM To: 'General Discussion: On-Topic and Off-Topic Posts' cctalk at classiccmp.org Subject: RE: (copy of ) Apple I on ebay I traded some email tonight with the seller. His replies were interesting so I asked if I could share them here on cctalk. He said yes. ---------------- In the first message he said (exact quote, unedited): Well, I didn't want people getting something they don't want or expect, thats not what I'm about. BTW after talking to my friend locally... The whole story and truth came out about this computer! So, the guy (a long close freind of mine ebay account MacEffects bought this from the seller listed recently, and sold to a guy in a city about 20 miles away... I love auctions, went to what I thought was an Estate auction... But it was a house full of scams... And it was being offered as the real deal, and advertised in local paper, sevral bidders, I won it for $3950 (a low price I thought, but I didn't know of this Obtonic computer), and figured I'd make some money being that I have no idea of these computers, or collect (serious) anyways, I thought I'd sell it... Turns out, I got screwed, he won't take it back and the cops are 'investigating' him for other things similar to it, anyways my buddy in town Mark bought it for $1500 off me (he lost a little) but, its better then nothing, he plans to sell it as well. I lost an additional $160 on eBay listings .. I tried going on your site, but I can't figure out the Forum thing. Are you a member there? Anyways, thanks for helping me out I appricate it, I got 30 e-mails in 6 hours, so I pulled it, the 4 'experts' are wrong... pfft, happens, it fooled ME! Then in a second message he said (again, unedited): Yeah, its odd... The net makes it a small world, rarity that I ended up with something a good friend and fellow "noob" collector, both had it, and not directly. But life happens, anyways, yeah if you could just let them no, I didn't try to scam anyone, as I pulled the auction within 1.5 days of being listed, I don't want anyone to get screwed, it happened to me, but it sucks, and I don't want someone else to go though it. Anyway if you'd let them know that'd be nice, if not thats fine too. Just don't want a bad rep. Thanks Again. ------------------ So there ya'll have it. According to this seller, he got fooled. At first he heard from some self-proclaimed "Apple experts" (probably just fanboys) insisting it is a REAL unit. Then he got a bunch of emails from we crazy cctalk'ers who scared him into reality. :) -----Original Message----- From: Evan Koblentz [mailto:evan at snarc.net] Sent: Saturday, June 14, 2008 11:01 PM To: 'General Discussion: On-Topic and Off-Topic Posts' Subject: RE: (copy of ) Apple I on ebay Yah, right - just so happened that he got busted trying to rip people off. It appears, at least in my opinion, that the seller was merely uninformed and/or in denial because HE got duped -- not trying to scam anyone. Or at least that's what I want to believe ...

17 years, 10 months

(copy of ) Apple I on ebay

by tonym＠compusource.net

Seller pulled the auction....says he will "return the item to the person he bought it from" Yah, right - just so happened that he got busted trying to rip people off. Oh, btw, I just found a 1970 Hemi Cuda Convertible in a barn in central florida - first $200K gets it! Tony -----Original Message----- From: Grant Stockly grant at stockly.com Sent 6/14/2008 10:00:23 PM To: General Discussion: On-Topic and Off-Topic Posts cctalk at classiccmp.org Subject: Re: (copy of ) Apple I on ebay Does anyone have high-resolution scans of a known genuine board and an obtronix replica? I'll share with everyone... http://www.stockly.com/images4/080614-Obtronix_Top.jpg http://www.stockly.com/images4/080614-Vintage_Apple1_Top.jpg http://www.stockly.com/images4/080614-Vintage_Apple1_Cassette_Topt.GIF

17 years, 10 months

Apple 1 on eBay

by sellam＠vintagetech.com

Well, I thought I'd chime in since I'm somewhat of an "expert" on these. As has been thoroughly deduced already, the board in question was an obvious fake. The lack of the copyright message, the font of the lettering, the contour of the PCB traces, and the other more fine details are all dead giveaways. It's obviously and Obtronix clone. The fact that the definitive telltale marks have been washed from the board is damning. I'm sure there's an interesting story behind this either way. With regards to the auction text: "Trophy For 1st place 2002 Vintage Computer & Electronics Faire" If the guy was talking about the Vintage Computer Festival then I don't know what he's talking about. We didn't feature any Apple-1 in the exhibits at VCF 5.0 in 2002. Al said: "I though Sellam knew where all of them were?" I only know where the ones are that I know of :) I am discovering roughly 2 new ones out in the wild every year or so, though I expect that trend to drop off sharply over time as I've already located 42 so far and my research tells me that there are probably (PROBABLY) no more than 50 still in existence. I emphasize "probably" because this number was deduced through research that was not exacting (I can provide details if there's interest). I'm glad the guy had the sense to pull the auction. -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

17 years, 10 months

(copy of ) Apple I on ebay

by labomb_s＠yahoo.com

> > Is anyone else questioning if this 'original' might instead be one of Steve > Gabaly's > > (aka 'obtronix') replicas? > > > That appears to be the case. The Rockwell 40 pin chip is wrong as well. > > Unfortuantely, "counterfeits" doesn't appear to be in any of the categories > eBay lets you report. In taking a second look, the cassette board doesn't have a copyright message (or NTI logo) because it too, appears to have been specifically altered to remove Steve's 'Homebrew 2005' message. What a shame... Scott

17 years, 10 months

CP/M Z80 home brew computer circuit board

by lynchaj＠yahoo.com

Hi, If anyone would like to make their own low cost home brew Z80 CP/M computer please contact me by email. I have manufactured PCBs available for sale for $20 each plus shipping. Preprogrammed EPROMs are also available for sale. The hardware and software are documented including schematics, source code, binary images, PCB layout, parts list, etc. Details of the single board computer are available at: http://groups.google.com/group/n8vem Thanks! Andrew Lynch

17 years, 10 months

(copy of ) Apple I on ebay

by aek＠bitsavers.org

> Is anyone else questioning if this 'original' might instead be one of Steve Gabaly's > (aka 'obtronix') replicas? That appears to be the case. The Rockwell 40 pin chip is wrong as well. Unfortuantely, "counterfeits" doesn't appear to be in any of the categories eBay lets you report.

17 years, 10 months

Apple I on ebay

by labomb_s＠yahoo.com

----- Original Message ---- > > Apple I on eBay with Bid Now of $19,9999 or starting bid of $9,9999. It's > 220246191431 Is anyone else questioning if this 'original' might instead be one of Steve Gabaly's (aka 'obtronix') replicas? Note the lack of the copyright message under the close-up of the 'Apple Computer 1' logo (I believe the original has 'Palo Alto, Ca. Copyright 1976'). Also note that the edge connector appears to have tin plated pads (like Steve's replica) vs. gold plated pads (like the original). Coincidentally, there appears to be an air-brushed (or rubbed out) spot on the back of the board ...precisely in the spot where Steve included the 'Homebrew 2005' message to help differentiate his replica from the original. Last, the ROM labels on the cassette board are identical to those provided with Steve's cassette board kit (and I thought that the original cassette board had a copyright message on the upper right corner as well). Can't speak for the referenced owner manuals, certificates, etc... (conveniently not pictured ...I would think that the $20k asking price would warrant a couple of extra pix of those items). Scott

17 years, 10 months

sorry for the downtime

by jwest＠dewey.classiccmp.org

A list member emailed me saying there appeared to be a problem with the list. When I looked at the server I saw the usual problem, fixed it, and neglected to check further (this is a reoccuring problem that I have to "fix" every month or so). I assumed as usual this would fix the problem and was in a hurry to get out the door. Turns out, this time there was also something else amiss, so I went through a day or two of "it's already fixed" emails, only to find out it wasn't. My apologies, all should be well now. Jay West

17 years, 10 months

Apple I on ebay

by aek＠bitsavers.org

"This computer will only be sold to a MUSEUM OR SERIOUS COLLECTOR ONLY" eBay is absolutely the WRONG venue to try proving that. The whole notion of someone going to an estate sale and picking this up is unfortunate as well. I though Sellam knew where all of them were?

17 years, 10 months

Apple I on ebay

by jrkeys＠concentric.net

Apple I on eBay with Bid Now of $19,9999 or starting bid of $9,9999. It's 220246191431 John

17 years, 10 months

PDP8: Anybody with RALF assembler experience?

by hachti＠hachti.de

Hi folks, I recently added a LAB-8/e (PDP-8/e) to my collection. Most of the machine is just running fine (except that I still urgently need at least 8K of core!!). One of the two racks contains the FPP-12 floating point processor. So I can write programs in FORTRAN IV, compile them and run them on the FPP. An awsome device - with it, the 8/e becomes a real dual core machine as the FPP-12 fetches its own instructions from core by data breaks (getting at most half of the 8's memory bandwidth). Now I want to run my Mandelbrot set program written for the H316 on the 8/e with FPP as well. The FORTRAN IV code was quite compatible (had to adjust some of the FORMAT statements and IO channel numbers). But now I want to write a "putchar" routine needed by the program. On the H316 that was simple: One CPU, perfectly documented calling conventions etc. On the 8/e the FORTRAN IV compiler produces output for the RALF assembler. RALF is capable of producing machine code for PDP-8 *and* the FPP as well. The main part of FORTRAN IV programs (nearly everything except IO) runs on the FPP. Subroutine calling and argument passing are also done on the FPP. I now want to know if there are people out there who are able to help me to program a simple PDP-8 assembler subroutine that can be called from within a FORTRAN IV program. Sounds easy - but isn't. I have written a template function and then compiled to RALF assembly - I don't understand very much :-( If anyone has experience with the FPP, RALF and "trapping" (they really call it that way) to PDP-8 code, **please** get in touch with me! Many thanks and best wishes, Philipp :-) P.S.: In FORTRAN IV the desired subroutine would have a signature like "SUBROUTINE PCHAR(I)"

17 years, 10 months

IBM 5120 (~1980) , IBM 5363 free in Gainesville, FL

by tosteve＠yahoo.com

They are not mine, do not contact me, contact: PyramidMotorLine at aol.com if interested. Actually, it's an IBM 5110-3 with the 5103 printer - no 5114 floppy drive. Also, IBM 5363 newer model of the System/36. Some pics here: http://www.geocities.com/tosteve/5120.jpg http://www.geocities.com/tosteve/5363.jpg They are not mine, do not contact me, contact: PyramidMotorLine at aol.com if interested.

17 years, 10 months

Basic interpreter 8080 source code needed

by ajp166＠bellatlantic.net

> >Subject: Basic interpreter 8080 source code needed > From: Jeff Erwin <jerwin at PureNetworks.com> > Date: Thu, 12 Jun 2008 09:30:08 -0700 > To: <cctech at classiccmp.org> > > >I have my Imsai 8080 fully running and communicating with my Mac Pro as a >dumb terminal. Many thanks to this group for helpful pushing along the way.. >I have also modified SCS1, the Imsai monitor program, to my liking and have >it burned into PROM. Since I do not yet have a floppy system for this >antique, I wrote an Intel hex format loader and just send the hex files over >the serial line to load them. > >Life is good. > >What I am looking for now is the 8080 asm source code to a good 8K basic >interpreter. I found one called TinyBasic but it was so concerned with >space the author built in a ton of self-modifying code and trying to follow >the logic is like untying a plate of spaghetti. I have another one called >BASIC85 which is better but assumes a VIO memory-addressable video system. >If necessary I will take this one apart and make it work. I hear a lot >about Imsai having an 8K basic, and I can find the manuals, but I can?t seem >to locate the actual 8080 source. > >Anyone out there know of or have the asm source code to a basic interpreter >or know what became of the Imsai Basic8K? There are a pot load of BASICs on the net in source form. One can be found on the Dave's old Computers [Dave Dunfield]. Others are around try looking for LLL Basic. Tinybasic is a good one really despite appearances as it was from my memory romable [There were several different ones]. Get back with what you find. I do have LLL and a version of PT 5K basics in my archive and I got them off the net. Allison > >Jeff Erwin

17 years, 10 months

Fwd: Manual "IBM Card" Punch on eBay...

by lbickley＠bickleywest.com

My Oops, that should have been Wright Line Model 2600, not "Write Line...". Sigh, it's a Friday... Lyle ---------- Forwarded Message ---------- Subject: Manual "IBM Card" Punch on eBay... Date: Friday 13 June 2008 14:03 From: Lyle Bickley <lbickley at bickleywest.com> To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org>, Bay Area Collector List <baccl at lists.baccl.net> There is a Write Line Model 2600 IBM Card Punch on eBay (#370060251979). I know the seller (Weirdstuff Warehouse) - and took a look at it. It is in good shape - the escapement works fine and the keys don't stick. One of the folks at Weirdstuff punched blank IBM cards I gave him (which is what you see in the eBay pictures). I would bid on this item myself - but I've managed to "avoid" card reader and punch I/O ;-) This is not my item (i.e., consignment) - nor do I have any business interest in this auction. Regards, Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero" ------------------------------------------------------- -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

17 years, 10 months

HP 7035B Plotter replacement drive belt?

by neilm＠excaliburengineering.com

Hello Tom, Do you have any replacement parts or are willing to part with your 7035B? Best Regards, Neil J. McGee Excalibur Engineering 9201 Irvine Blvd. Irvine, CA 92618 P - 949-454-6603 xt 26 F - 949-454-6642 www.excaliburengineering.com <http://www.excaliburengineering.com/> "The only way to beat the lawyers is to die with nothing." - Will Rogers

17 years, 10 months

Manual "IBM Card" Punch on eBay...

by lbickley＠bickleywest.com

There is a Write Line Model 2600 IBM Card Punch on eBay (#370060251979). I know the seller (Weirdstuff Warehouse) - and took a look at it. It is in good shape - the escapement works fine and the keys don't stick. One of the folks at Weirdstuff punched blank IBM cards I gave him (which is what you see in the eBay pictures). I would bid on this item myself - but I've managed to "avoid" card reader and punch I/O ;-) This is not my item (i.e., consignment) - nor do I have any business interest in this auction. Regards, Lyle -- Lyle Bickley Bickley Consulting West Inc. Mountain View, CA http://bickleywest.com "Black holes are where God is dividing by zero"

17 years, 10 months

Replacemnets for F8 Microprocessors

by jrr＠flippers.com

Has anyone seen a replacement part for the older F8 series of Fairchild/Mostek 3850/3851 etc. components? Or possibly the Mostek 3870 single chip CPU replacement? I have an application that needs a few of these replaced... John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out"

17 years, 10 months

sunos sources? (pre solaris)

by brad＠heeltoe.com

I know this is probably the wrong place to ask, but I'll claim sunos is vintage, or at least classic :-) Anyone know anything about old sunos sources, like sunos 2.0, or 4.1? Since solaris is now more "open", I wondered if sunos might also be. I keep fiddling with booting sunos 2.0 on the sun2 emulator. It's close - I got a banner at one point but still won't go. I'd love to look at the code where it probes the multibus... -brad

17 years, 10 months

IMSAI BASIC source

by jefferwin＠gmail.com

> >> >> I have my Imsai 8080 fully running and communicating with my Mac Pro as a >> dumb terminal. Many thanks to this group for helpful pushing along the way. >> I have also modified SCS1, the Imsai monitor program, to my liking and have >> it burned into PROM. Since I do not yet have a floppy system for this >> antique, I wrote an Intel hex format loader and just send the hex files over >> the serial line to load them. >> >> Life is good. >> >> What I am looking for now is the 8080 asm source code to a good 8K basic >> interpreter. I found one called TinyBasic but it was so concerned with >> space the author built in a ton of self-modifying code and trying to follow >> the logic is like untying a plate of spaghetti. I have another one called >> BASIC85 which is better but assumes a VIO memory-addressable video system. >> If necessary I will take this one apart and make it work. I hear a lot >> about Imsai having an 8K basic, and I can find the manuals, but I can?t seem >> to locate the actual 8080 source. >> >> Anyone out there know of or have the asm source code to a basic interpreter >> or know what became of the Imsai Basic8K? > > I have an itty-bitty (3K) integer basic for the 8080 which I wrote way back in > the 70's. You can get it up and running pretty easily and it doesn't depend on > any special I/O ... Source is included on my Altair disks, which you can > access > under my simulator (you can also run the BASIC to try it out if you like). > > I have a number of other 8080 code bits which you might find useful - editor, > assembler, disassembler, debugger, games etc. much of which is also available > in my Altair disks. > > Regards, > Dave > > -- > dave06a (at) Dave Dunfield > dunfield (dot) Firmware development services & tools: www.dunfield.com > com Collector of vintage computing equipment: > http://www.classiccmp.org/dunfield/index.html > Dave, I did purchase your kit and am using your asm85 (I do have a couple of questions but it can wait), many thanks for having these available. Most of the BASIC source I have found is either poorly written or so tightly wound into a specific hardware implementation that it isn't really usable. I did recently find something called BASIC-5.ASM, written by a Kevin Jordon and modified by a Jeff Zurkow. It looks to be the Processor Tech 5K BASIC adapted for CPM. It looks like I can pretty easily stub the CPM calls and replace them with the IO routines I have created. For anyone interested or anyone who has an IMSAI 8080 with a basic rs232 IO system, I have modified SCS1 (the Imsai monitor) to be a bit more robust as a debugger and to include an Intel HEX loader and Cromemco ByteSaverII prom programming system. I also have the BASIC5K source which appears to be pretty clean and well documented. I haven't found a lick of self-modifing code in it! I am more than happy to make these sources available. Jeff Erwin

17 years, 10 months

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb