I've got a xceed setup I've been trying to figure out what to do with. Might just end up on Ebay. -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of cctech-request at classiccmp.org Sent: Monday, April 14, 2008 10:01 AM To: cctech at classiccmp.org Subject: cctech Digest, Vol 56, Issue 17 Send cctech mailing list submissions to cctech at classiccmp.org To subscribe or unsubscribe via the World Wide Web, visit http://www.classiccmp.org/mailman/listinfo/cctech or, via email, send a message with subject or body 'help' to cctech-request at classiccmp.org You can reach the person managing the list at cctech-owner at classiccmp.org When replying, please edit your Subject line so it is more specific than "Re: Contents of cctech digest..." Today's Topics: 1. Re: Help with ICL power supply fault (Farnell SMPS) (Tony Duell) 2. Re: Mac Plus ozone? (Curtis H. Wilbar Jr.) 3. Re: Schematics and description of an acoustic memory (1k byte, Display terminal, 1969) (pichotjm) 4. RE: modern switching power supply faults (dwight elvey) 5. Re: pcmcia gpib on govliquidation (Richard) 6. Re: govliq: HP-1000 (Mechanicsburg, PA) (Richard) 7. Re: IBM 6094 Lighted Programmable Function Keypad - bulk buy on eBay (Paxton Hoag) 8. Re: Mac Plus ozone? (Chuck Guzis) 9. Re: modern switching power supply faults (Tony Duell) 10. looking for replacement parts - 74S01, 74S73, 2518, 2533 (Eric Smith) 11. Re: looking for replacement parts - 74S01, 74S73, 2518, 2533 (Eric Smith) 12. Re: Schematics and description of an acoustic memory (1k byte, Display terminal, 1969) (Eric Smith) 13. Re: Seeking Xceed Color30 card (Jeff Walther) 14. Re: Seeking Xceed Color30 card (David Griffith) 15. Bay Area collection viewing? (William Donzelli) 16. Re: Seeking Xceed Color30 card (Cameron Kaiser) 17. Big, heavy HP 7974 tape drive at BDI (Bob Rosenbloom) 18. RE: OK, now this is impossible (11/23+ and RL02-RLV12 problem) (Bob Armstrong) 19. RE: modern switching power supply faults (dwight elvey) 20. Re: Seeking Xceed Color30 card (Teo Zenios) 21. Re: looking for replacement parts - 74S01, 74S73, 2518, 2533 (Grant Stockly) ---------------------------------------------------------------------- Message: 1 Date: Sun, 13 Apr 2008 17:41:42 +0100 (BST) From: ard at p850ug1.demon.co.uk (Tony Duell) Subject: Re: Help with ICL power supply fault (Farnell SMPS) To: cctalk at classiccmp.org Message-ID: <m1Jl5H0-000IxtC at p850ug1> Content-Type: text/plain input exactly If you do this, make sure the 'scope can stand a 'common mode voltage' of a few hundred volts, because that's what it's going to be seeing. I would think a fair number of 'scopes will not be happy looking at a signal of a few volts (so the Y attenuators are set to, perhaps, 1V/cm) with a common mode voltage of the full mains. -tony ------------------------------ Message: 2 Date: Sun, 13 Apr 2008 09:32:36 -0400 From: "Curtis H. Wilbar Jr." <rescue at hawkmountain.net> Subject: Re: Mac Plus ozone? To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Message-ID: <48020B74.1000206 at hawkmountain.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed John Robertson wrote: Called DAG I believe. I'll have to open this up, probably check it out in a dark room, then I can always discharge with my hv meter or wait patiently for at least a day (and then double check with the hv meter :-) ). which B&W video games ? Vectors or Rasters ? I have an Asteroids I haven't repaired yet. (I have around 12 vids, aprox half rasters, half vectors) I am the 'repair shop' for them (but sadly get very little time, so several or awaiting repair). Currently (off topic, but possibly of interest to some) on the repair room floor: Star Wars (mathbox probs), Rip Off (sound problems), Tempest (flakes out with large vectors and crashes randomly, might be bad ram socket from a ram someone replaced), Major Havoc (mainboard problems, to be built into a Tempest cab), Xevious (the dreaded Matsushita monitor is slewing video at the edge of the (rotated) screen), and I'm sure I'm forgetting a couple. My Joust leaks HV... I think the DAG coating has become damaged (flaked off, or partially 'cleaned' off by someone). Especially if there is moisture in the air, it crackles, and IIRC I observed a faint lighting show around the DAG coating. I believe you can get a coating to redo the DAG, but I haven't researched that far yet. OK.. enough off topic (hrm... maybe not too of topic.. they are essentially computers :-) ). -- Curt ------------------------------ Message: 3 Date: Sun, 13 Apr 2008 16:02:08 +0200 From: "pichotjm" <pichotjm at free.fr> Subject: Re: Schematics and description of an acoustic memory (1k byte, Display terminal, 1969) To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> Message-ID: <014b01c89d6e$f70fcb70$2601a8c0 at JM3800> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original It was just to remind the common design context in 1969. There were some registers for computers or military products. I have many young readers... Are they named RAM in databooks? or registers? I think i have one, 4 bits but without adress decoding. There are 4 register selects! Interesting! I have a lot of MK4007 by Mostek. 256x1 i think similar to the 1101 by Intel. They are used in the Beryllium board: http://pichotjm.free.fr/1975-1980/Beryllium/PICT8117.html I have specification of a 32x4 bit shift register from RTC (FDN 106, 240.00 francs/1 # $50/1) dated 1970. Other specs are for 256x4 512x2 and 1024x1 but unusable for raster scans. In that time (1970) i remember to ask a company to develop a custom 80x8... but the cost was too heavy. Btw, i have specs of TTL used in that design, if anybody need them... (in french!) JMP ------------------------------ Message: 4 Date: Sun, 13 Apr 2008 07:16:31 -0700 From: dwight elvey <dkelvey at hotmail.com> Subject: RE: modern switching power supply faults To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <BAY138-W132E3CC76D9E194B50669DA3E90 at phx.gbl> Content-Type: text/plain; charset="iso-8859-1" Hi I to have a problem with one. It is similar to your first one. Basically, the first problem is that something is failing to start the switcher feedback. What happens on powerup is that it is given one kick. This gets the 12v going to the regulator circuit. It is then suppose to send pulses through the pulse transformer to fire the switching transistors. It could be most anything in the regulation loop. I fixed one in the past when I found an open wire in the pulse transformer. Still, it could have been anything in the feedback path, including regulator ICs, filter caps, diodes, resistors, etc. Mine is failing on a load related problem. As I connect more load, it fails to powerup. It is funny that it seem to be more sensitive to the loads that use the 12V. It seems to run the 5V loads fine. Your second one has most likely had a failed switching transformer and switching transistor. There could also be a load issue, such as shorted rectifier diodes on the secondary but that is unlikely. This would tend to keep the 12V from coming up and you'd get no pulses to fire the switching transistors. They're unlikely to fail if not turned on. Dwight _________________________________________________________________ More immediate than e-mail? Get instant access with Windows Live Messenger. http://www.windowslive.com/messenger/overview.html?ocid=TXT_TAGLM_WL_Refresh _instantaccess_042008 ------------------------------ Message: 5 Date: Sun, 13 Apr 2008 11:23:14 -0600 From: Richard <legalize at xmission.com> Subject: Re: pcmcia gpib on govliquidation To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <E1Jl5v9-000256-00 at xmission.xmission.com> In article <4801AC99.4050300 at Rikers.org>, Tim Riker <Tim at rikers.org> writes: Nope. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/> ------------------------------ Message: 6 Date: Sun, 13 Apr 2008 11:24:28 -0600 From: Richard <legalize at xmission.com> Subject: Re: govliq: HP-1000 (Mechanicsburg, PA) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <E1Jl5wK-0002A7-00 at xmission.xmission.com> In article <200804130758.05630.rtellason at verizon.net>, "Roy J. Tellason" <rtellason at verizon.net> writes: You can enquire through the location if they allow you to haul it away incrementally, otherwise I guess you have to rent a truck and manually unpack it from the pallets into the truck. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/> ------------------------------ Message: 7 Date: Sun, 13 Apr 2008 10:44:06 -0700 From: "Paxton Hoag" <innfoclassics at gmail.com> Subject: Re: IBM 6094 Lighted Programmable Function Keypad - bulk buy on eBay To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <ded268c40804131044p1b41db1am5233047d3099642f at mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 I got both lots. There were 11 people interested and I have filled about 7 of the orders as people pay me for what they want. If you are still interested let me know at paxton.hoag at gmail.com. I have not tinkered with one except to take one with a broken key apart. Parts available if needed. I still have a lot of them. Pax -- Paxton Hoag Astoria, OR USA ------------------------------ Message: 8 Date: Sun, 13 Apr 2008 11:03:19 -0700 From: "Chuck Guzis" <cclist at sydex.com> Subject: Re: Mac Plus ozone? To: cctalk at classiccmp.org Message-ID: <4801E877.150.EBB4D0D at cclist.sydex.com> Content-Type: text/plain; charset=US-ASCII Date: Sun, 13 Apr 2008 09:32:36 -0400 I believe the proper name for the water-based colloidal graphite suspension used to coat CRT surfaces is "aquadag". "Dag" is probably just a shortened form. Aquadag paint for repair should still be available. Some old HOTs (horizontal output transformers/flyback transformer) in CRT HV supplies develop cracks in the potting material with age and sometimes expose the connection of the winding to the HV anode lead. This can cause a corona discharge and the ozone smell. There can also be arcing from the HV lead to the chassis. A lights-out inspection will sometimes yield the telltale purple glow of corona discharge. Often, the discharge can be heard by young ears as a "hissing" sound. Good old red glyptal HV dope is the most commonly prescribed cure for insulation failures. I think GC still sells the stuff. Cheers, Chuck ------------------------------ Message: 9 Date: Sun, 13 Apr 2008 17:51:44 +0100 (BST) From: ard at p850ug1.demon.co.uk (Tony Duell) Subject: Re: modern switching power supply faults To: cctalk at classiccmp.org Message-ID: <m1Jl5Qh-000IxvC at p850ug1> Content-Type: text/plain Di U deduyce from that marking that it's a 15 Ohm resistor? Is it possibly part of a soft-start circuit, to be shorted out by a triac or similar once the supply has got going. If so, then if that fails and the resistor is left in circuit, it will overheat. There have been supplies where there's a startup resistor -- to power the control circuitry until the rest of the supply gets going -- which would overheat if said supply took too long to get goiog. The resistor simply couldn't power the circuitry for long on its own. But I would expect such a resistor to be a lot more than 15 ohms What is that relay connected to/used for? It doesn't short out the reistor by any chance as part of a soft-start circuit, does it? not Any recognisable chips on that board? FWIW, there have been some very complicated SMPUs in classic machines. The HP9845B, a complicated machine in all respsects, has a PSU on a 3-dimentional sculpture of PCBs, with 4 chopper transistors, 2 main chopper transformes, and IIRC 17 ICs on the control PCB. -tony ------------------------------ Message: 10 Date: Sun, 13 Apr 2008 22:58:10 -0700 (PDT) From: "Eric Smith" <eric at brouhaha.com> Subject: looking for replacement parts - 74S01, 74S73, 2518, 2533 To: cctalk at classiccmp.org Message-ID: <34656.68.121.162.227.1208152690.squirrel at ruckus.brouhaha.com> Content-Type: text/plain;charset=iso-8859-1 It was recently asserted here that TTL parts aren't hard to find, but I'm having a heck of a time finding the 74S01 and 74S73. As far as I can tell from the data sheets, the 74S103 is functionally and pin-compatible with the 74S73, but a little faster. I wouldn't mind substituting that, but it doesn't seem any easier to find. The 74S03 and 74S107 are non-pin-compatible replacements for the 74S01 and 74S73, but I'd much prefer to stick with pin-compatible parts. I'm also looking for the 2518 and 2533 shift registers. The 2518 is a hex 32-bit static shift register, and the 2533 is a 1024-bit static (not dynamic!) shift register. The original parts were Signetics, but I don't mind using other sources: Signetics 2518 2533 TI TMS3122 TMS3133 Fairchild 3349 3533 National - MM5058 GI - 2533 AMD - Am2833 Eric ------------------------------ Message: 11 Date: Mon, 14 Apr 2008 00:36:42 -0700 (PDT) From: "Eric Smith" <eric at brouhaha.com> Subject: Re: looking for replacement parts - 74S01, 74S73, 2518, 2533 To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <39040.68.121.162.227.1208158602.squirrel at ruckus.brouhaha.com> Content-Type: text/plain;charset=iso-8859-1 Grant wrote: None of them (other than the 74S03, which has the wrong pinout) are listed on their web site. If you mean that they can deal with parts brokers at my request, I've tried dealing with the parts brokers myself, and had poor results. I'm willing to place an order for $250 total, but not for $250 for each line item, which seems to be the minimum the brokers are willing to consider. Eric ------------------------------ Message: 12 Date: Mon, 14 Apr 2008 00:51:33 -0700 (PDT) From: "Eric Smith" <eric at brouhaha.com> Subject: Re: Schematics and description of an acoustic memory (1k byte, Display terminal, 1969) To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <45219.68.121.162.227.1208159493.squirrel at ruckus.brouhaha.com> Content-Type: text/plain;charset=iso-8859-1 JMP wrote: The Fairchild 9030 and 9033 are described in the databook as an "8 Bit Memory Cell" and "16 Bit Memory Cell", respectively. They're obviously read/write memory that is randomly addressable, so they are RAM. I'm not sure about the 9030, but the 9033 uses "coincident select", like core memory. You provide a decoded one-of-four row address and a decoded one-of-four column address. "As many as four locations may be addressed simultaneously without destroying stored information." It was common for early RAM chips not to use a linear address. Those that did were often described as "fully decoded RAM". The 9033 is thus a "not fully decoded RAM". Eric ------------------------------ Message: 13 Date: Sun, 13 Apr 2008 14:02:37 -0500 From: Jeff Walther <trag at io.com> Subject: Re: Seeking Xceed Color30 card To: cctech at classiccmp.org Message-ID: &lt;a04310101c42801b57c55(a)[192.168.1.10]&gt; Content-Type: text/plain; charset="us-ascii" ; format="flowed" I would say I'm still in the conceptual stage. I've examined the Is and the Os in the documentation and I pretty much know what I want to build, with a few choices still remaining (e.g. SRAM vs. DDR2). But I'm stymied by the details and by the fact that when I started this I was unemployed and had time, although my motivation was low due to the associated emotional challenges. Now I am wonderfully employed, and very happy, but have very little spare time. I've read through "Designing Cards and Drivers for the Macintosh" (IIRC) but I need to go through in more detail and draw a diagram of the ROM structure. But it seems to me that some of what I need to know is in Inside Macintosh and extracting those tidbits is difficult (for me). Also, some of the information I want to examine is contained in Pascal coding examples, and I don't know Pascal. It will be easy enough to pick up, but it's another step back from the actual project. Of course, all of the Apple documentation assumes that the audience is already an expert at building the component they want to build and only needs the Apple specifics, and I've never designed a video card. I haven't found any kind of book about it anywhere. I picked up whatshisnames book about the video typewriter and the follow up book, but it doesn't seem quite applicable to this application. So I'm in one of those situations where I need bits of information in order to truly understand other bits of information. But I don't know in what order I really need the bits in order to make them comprehensible. Worse, I don't actually know which piece will be in which resource. So I need to find all the pieces of information, fail to understand them as I find them, but identify them, then after they've all been found, reorder them and go back, this time in logical sequence and put it all together. Maybe if I was smarter, one pass would be enough... I'm somewhere late in the finding all the pieces without understanding them yet stage, paused just before doing a quick learn of Pascal so I can examine/understand the examples in Inside Macintosh. But I still lack a resource on the finer points of video card design. I understand the basic fucntion, but there are always details which clever people have worked out, which a latecomer like me can greatly benefit from. For example, the various schemes to avoid drawing the top half of the screen and then using changed data for the bottom half of the screen. I'm familiar with the simple expedient of having two screen buffers. But I understand that there are more elegant solutions in use, otherwise video cards would need twice as much VRAM. Is it really all about tracking updates as they come in and only allowing ones which are earlier in the buffer than the current draw point, and delaying the others until the drawing point passes? If so, one would either hold up the host system, or need an additional buffer for the delayed changes. Yes? No? As far as cramming a lot more into the PDS slot with smaller components... Yes, the thing holding folks back is the time and skill to code, not the available technology. Taken to its logical conclusion, we would take a moderate sized FPGA, emulate the 68030 and FPU on board, put a fast memory interface on the FPGA, add a USB2 chipset and fast ethernet I/O, plus an ATA interface and video outputs, then just use the SE/30 board as an I/O peripheral and home to the Apple ROM, with the built-in 9" screen as one display and a connector for a large color display if desired. Alternatively, use a Coldfire MCU, patch the unimplemented 68030 instructions with the exception handler (there's a library at Freescale for this) and then copy the basic design of the Daystar CPU upgrades which already worked out how to put a faster 68030 into the PDS slot. With a little more work patching the firmware, one could use a Coldfire with built in USB and ethernet, but that's a lot more software work. One also loses the FPU functionality, and if your code calls many of the unimplemented instructions it could be pretty slow. But all those projects are dauntingly large. For now, I'd like a video card. Later, an ATA interface. Maybe USB after that, but frankly, without a more skilled programmer's help, I don't think I will be able/willing to write USB drivers. Eventually, it could all go on one card. Jeff Walther ------------------------------ Message: 14 Date: Sun, 13 Apr 2008 14:02:26 -0700 (PDT) From: David Griffith <dgriffi at cs.csubak.edu> Subject: Re: Seeking Xceed Color30 card To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Cc: cctech at classiccmp.org Message-ID: <Pine.GSO.4.55.0804131400030.5772 at helios.cs.csubak.edu> Content-Type: TEXT/PLAIN; charset=US-ASCII On Sun, 13 Apr 2008, Jeff Walther wrote: I wonder how much trouble it would be to figure out what's inside that custom chip that Micron used. Suitable SCSI drives are fortunately still readily available. I don't think USB was ever available for System 6. -- David Griffith dgriffi at cs.csubak.edu A: Because it fouls the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? ------------------------------ Message: 15 Date: Sun, 13 Apr 2008 19:09:22 -0400 From: "William Donzelli" <wdonzelli at gmail.com> Subject: Bay Area collection viewing? To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <e1d20d630804131609lfc4c4e0rf8f7df4c11f28662 at mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Once again, this year I will be in the Bay Area for a few days, basically most of the week of the 4th of May. In the past, a couple of computer collectors opened their doors to me and did a show and tell. Once again, thank you much. So, does anyone else want to show of their machines to an East Coast weenie? Remember, bigger is better. Microcomputers are only shims for real computers. Computers with big blue skins are extra cool. Old is good. Let me know as soon as possible. I will have some email access as I cross the country, but I always like to have things planned out before I leave my driveway. -- Will ------------------------------ Message: 16 Date: Sun, 13 Apr 2008 17:38:39 -0700 (PDT) From: Cameron Kaiser <spectre at floodgap.com> Subject: Re: Seeking Xceed Color30 card To: cctalk at classiccmp.org Message-ID: <200804140038.m3E0cd9d012732 at floodgap.com> Content-Type: text/plain; charset=US-ASCII I don't believe I have ever seen USB drivers for System 7 either. -- ------------------------------------ personal: http://www.cameronkaiser.com/ -- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- Once used rectally, [it] should not be used orally. --Real thermometer label ------------------------------ Message: 17 Date: Sun, 13 Apr 2008 18:25:10 -0700 From: Bob Rosenbloom <bobalan at sbcglobal.net> Subject: Big, heavy HP 7974 tape drive at BDI To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Message-ID: <4802B276.9000503 at sbcglobal.net> Content-Type: text/plain; charset=ISO-8859-1; format=flowed See: http://www.auctionbdi.com/getpictures.asp?aucid=100131 Bidding ends tonight so if anyone's interested..... Bob ------------------------------ Message: 18 Date: Sun, 13 Apr 2008 19:21:11 -0700 From: "Bob Armstrong" <bob at jfcl.com> Subject: RE: OK, now this is impossible (11/23+ and RL02-RLV12 problem) To: "'General Discussion: On-Topic and Off-Topic Posts'" <cctalk at classiccmp.org> Message-ID: <000001c89dd6$354537b0$9fcfa710$@com> Content-Type: text/plain; charset="us-ascii" Thanks, Pete, Guy and Lyle (who phoned me) for the suggestions. After some poking around and much time spent peering into dark corners with a flashlight, it turns out that the RLV12 is the source of the problem. I managed to borrow another RLV12 board and that one works fine, for both RSX and XXDP. So, option #1 is that the first RLV12 is just bad, although oddly so as it apparently works for RSX but not XXDP. However, I notice that the working RLV12 has a couple of ECO wires on it that are absent from the "non-working" RLV12, and I can't help but wonder if that has something to do with it. Does anybody know the ECOs for the RLV12/M8061 and whether they have any bad effects on XXDP? Thanks again, Bob ------------------------------ Message: 19 Date: Sun, 13 Apr 2008 19:59:20 -0700 From: dwight elvey <dkelvey at hotmail.com> Subject: RE: modern switching power supply faults To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <BAY138-W334CC3BC797AA074CDA546A3E80 at phx.gbl> Content-Type: text/plain; charset="Windows-1252" ---snip--- Hi Tony I have a HP 21mx. The switcher in there is one of the most complicated that I've ever seen. When I first got it, it took me a while of studying the schematics before I realized it needed the resistor that was suppose to be the thermal sense in the battery pack. This group was great in helping get the right value and connector. I think the switcher the fellow is looking at is the typical type used in most PC's. It does sound like he may be able to get enough parts to put together a working PS. It is at least worth a try. Both cases may have issued in the primary side though. Dwight _________________________________________________________________ Pack up or back upuse SkyDrive to transfer files or keep extra copies. Learn how. hthttp://www.windowslive.com/skydrive/overview.html?ocid=TXT_TAGLM_WL_Refres h_skydrive_packup_042008 ------------------------------ Message: 20 Date: Mon, 14 Apr 2008 01:56:55 -0400 From: "Teo Zenios" <teoz at neo.rr.com> Subject: Re: Seeking Xceed Color30 card To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Message-ID: <000801c89df4$5897bee0$c600a8c0 at game> Content-Type: text/plain; charset="iso-8859-1" ----- Original Message ----- From: "Cameron Kaiser" <spectre at floodgap.com> To: <cctalk at classiccmp.org> Sent: Sunday, April 13, 2008 8:38 PM Subject: Re: Seeking Xceed Color30 card still I think Mac OS 8.5/8.6 was the 1st to enable USB support. ------------------------------ Message: 21 Date: Sun, 13 Apr 2008 23:28:20 -0800 From: Grant Stockly <grant at stockly.com> Subject: Re: looking for replacement parts - 74S01, 74S73, 2518, 2533 To: "General Discussion: On-Topic Posts Only" <cctech at classiccmp.org> Message-ID: <0JZB00JP30R4OIA0 at msgmmp-1.gci.net> Content-Type: text/plain; charset=us-ascii; format=flowed At 09:58 PM 4/13/2008, you wrote: Unicorn Electronics can get all of those ICs, but you'll have to order a minimum quantity. http://www.unicornelectronics.com/prod.htm End of cctech Digest, Vol 56, Issue 17 **************************************