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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#41
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![]() Cydrome Leader wrote: Michael A. Terrell wrote: Cydrome Leader wrote: Michael A. Terrell wrote: Yawn. What have you designed that can track up to 256 ports, and make sure the OS keeps track of what is connected to that port so the proper driver is used for the device? USB can't even keep track of 1 device moved between two ports, so I don't know what your 256 port chatter is even about. So, you're clueless, stupid & bitter. Got it. All the computer is doing is telling you that the device wasn't used on that port before. Try swapping an external RS-232 modem & RS-232 mouse on an old PC and you'll be doing all of the work yourself rather than just see a popup. you don't know what you're talking about is the problem here. take for example an epson 1680 scanner, or tons of other devices. moving it will require a reinstallation of the driver, and you can't just point windows at the location of the drivers, which are already there. Printers are notorious for this bull**** too. Back to the scanner- if you use with with the SCSI interface and change IDs it doesn't require a reinstall. Then buy any SCSI card & any SCSI scanner. The expensive cables, the teminator and have fun. Of course, there are lots of incompatable SCSI intefaces, and hardware. Try plugging a modern SCSI drive into an original SCSI card. Have you ever seen a SCSI cable catch on fire? I have, when the conductor for power to the terminator left a empty, burnt piece of plastic in the middle of a 50 conductor ribbon cable when the internal active teminator failed with a dead short petween that pin and the grounds. Let's see you do that with a current controlled USB port. something with USB and how things use it is completely retarded. RS-232 never claimed to be smart, easy or anything. USB does, which is a big lie. it's smart enough to **** you off. |
#42
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![]() William Sommerwerck wrote: Take for example an epson 1680 scanner, or tons of other devices. Moving it will require a reinstallation of the driver, and you can't just point Windows at the location of the drivers, which are already there. Printers are notorious for this bull****, too. No wonder you're farbissen. I've never seen this with USB. USB is keyed to the device's description -- not to a specific port. It sounds like he brings it on himself for buying Epson. They can screw up anything. Like the original magic Jack. It reinstalled itself every time the computer booted. Several minutes, with it's bootloader covering the center of the screen, and in your way. That wasn't a problem with USB, but the implementation. |
#43
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I've never seen this with USB. USB is keyed to the
device's description -- not to a specific port. Wrong. If I plug my iRiver H120 into any USB port on any computer, it's supposed to recognize that the device is a hard drive, and install the appropriate generic driver to communicate with it. If the device isn't "generic", the system will look through its "records" for the correct driver. If it finds it, fine. If not, it prompts me for the appropriate driver. I assume what Michael says about Epson screwing everything up is true. I've never installed an Epson product. |
#44
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On Fri, 14 Sep 2012 09:41:12 +0100, "Arfa Daily"
put finger to keyboard and composed: My father-in-law was a professional key-man who worked for the UK FO many years ago, and I remember him telling me that the first squeeze key that he put together in some god-forsaken outpost, was made from two thin table knives, taped together at the handles and jammed in a vise, with alligator clips for the connections ... ! :-) Isn't that kind of technology subject to the Official Secrets Act? :-) - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#45
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On Fri, 14 Sep 2012 01:22:59 +0000 (UTC), Cydrome Leader
put finger to keyboard and composed: I used a dumb terminal before I had a complete computer, so I'm no stranger to serial and all the goofy breakout boxes, null modem adapters and chain of adapters almost foot long to get stuff to work. It was all pretty stupid, but about as good as it gets for stuff that old. What I don't understand is why we need a 480Kbps interface to connect a keyboard or even a mouse. My maximum data transfer rate, as a two-finger typist, is only about 2 bytes per second, error correction notwithstanding. - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#46
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On Wed, 12 Sep 2012 18:34:33 +0100, "Arfa Daily"
put finger to keyboard and composed: Was I just unlucky that a crappily built Chinese switcher failed on me in just a couple of months ... I'll let you know in a couple of months. I just took delivery of one (I ordered it two weeks ago). - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#47
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What I don't understand is why we need a 480Kbps interface
to connect a keyboard or even a mouse. My maximum data transfer rate, as a two-finger typist, is only about 2 bytes per second, error correction notwithstanding. I assume you're joking. The U in USB stands for Universal. It's intended to connect almost any kind of device. |
#48
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On Sat, 15 Sep 2012 05:34:54 -0700, "William Sommerwerck"
put finger to keyboard and composed: What I don't understand is why we need a 480Kbps interface to connect a keyboard or even a mouse. My maximum data transfer rate, as a two-finger typist, is only about 2 bytes per second, error correction notwithstanding. I assume you're joking. The U in USB stands for Universal. It's intended to connect almost any kind of device. I'm serious. I find it extremely annoying when I encounter an application that won't run because it can't handle a USB keyboard or a USB mouse. IMO there was nothing wrong with the PS/2 or AT keyboards or mice, or serial mice for that matter (I'm still using a serial optical Mouse Systems mouse), so I see no reason to introduce an additional complication. USB is fine for high speed (or "full" speed) peripherals, but I'm not going to waste a port on a keyboard. - Franc Zabkar -- Please remove one 'i' from my address when replying by email. |
#49
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What I don't understand is why we need a 480Kbps interface
to connect a keyboard or even a mouse. My maximum data transfer rate, as a two-finger typist, is only about 2 bytes per second, error correction notwithstanding. The U in USB stands for Universal. It's intended to connect almost any kind of device. I'm serious. I find it extremely annoying when I encounter an application that won't run because it can't handle a USB keyboard or a USB mouse. IMO there was nothing wrong with the PS/2 or AT keyboards or mice, or serial mice for that matter (I'm still using a serial optical Mouse Systems mouse), so I see no reason to introduce an additional complication. USB is fine for high speed (or "full" speed) peripherals, but I'm not going to waste a port on a keyboard. You've lost me. A Windows or Mac program knows nothing about the interface used by a mouse or keyboard. It doesn't even "see" the device! The operating system sends the program messages with keyboard data or mouse positions. |
#50
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When I looked at the USB connector on the bottom of this one, pins 1 and
4 were the 5v output and gnd, but pins 2 and 3 were joined together, and had a couple of resistors hooked to them, and disappearing into the circuitry. So why is this ? Do they perhaps make 'alternate' use of To trick the device into believing that it's connected to a PC. You need this trick to charge devices like the iPod Touch! http://www.gizmodo.com.au/2008/07/si..._ch argers-2/ -- @~@ Remain silent. Nothing from soldiers and magicians is real! / v \ Simplicity is Beauty! May the Force and farces be with you! /( _ )\ (Fedora 17 i686) Linux 3.5.3-1.fc17.i686 ^ ^ 21:57:01 up 2:30 0 users load average: 0.00 0.01 0.05 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
#51
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Michael A. Terrell wrote:
Cydrome Leader wrote: Michael A. Terrell wrote: Cydrome Leader wrote: Michael A. Terrell wrote: Yawn. What have you designed that can track up to 256 ports, and make sure the OS keeps track of what is connected to that port so the proper driver is used for the device? USB can't even keep track of 1 device moved between two ports, so I don't know what your 256 port chatter is even about. So, you're clueless, stupid & bitter. Got it. All the computer is doing is telling you that the device wasn't used on that port before. Try swapping an external RS-232 modem & RS-232 mouse on an old PC and you'll be doing all of the work yourself rather than just see a popup. you don't know what you're talking about is the problem here. take for example an epson 1680 scanner, or tons of other devices. moving it will require a reinstallation of the driver, and you can't just point windows at the location of the drivers, which are already there. Printers are notorious for this bull**** too. Back to the scanner- if you use with with the SCSI interface and change IDs it doesn't require a reinstall. Then buy any SCSI card & any SCSI scanner. The expensive cables, the that's what I have. The same scanner has USB and SCSI. ONly the SCSI part works with no fuss. teminator and have fun. Of course, there are lots of incompatable SCSI intefaces, and hardware. Try plugging a modern SCSI drive into an Ok so HVD and anything else isn't compatible. The rest are. original SCSI card. Have you ever seen a SCSI cable catch on fire? I have, when the conductor for power to the terminator left a empty, burnt piece of plastic in the middle of a 50 conductor ribbon cable when the internal active teminator failed with a dead short petween that pin and the grounds. Let's see you do that with a current controlled USB port. your sad little computer fire has nothing to do with USB sucking ass. |
#52
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![]() Cydrome Leader wrote: your sad little computer fire has nothing to do with USB sucking ass. What is your fascination with sucking ass? |
#53
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Michael A. Terrell wrote:
Cydrome Leader wrote: your sad little computer fire has nothing to do with USB sucking ass. What is your fascination with sucking ass? You're the flamer with the burning SCSI cables, not me. |
#54
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![]() "Man-wai Chang" wrote in message ... When I looked at the USB connector on the bottom of this one, pins 1 and 4 were the 5v output and gnd, but pins 2 and 3 were joined together, and had a couple of resistors hooked to them, and disappearing into the circuitry. So why is this ? Do they perhaps make 'alternate' use of To trick the device into believing that it's connected to a PC. You need this trick to charge devices like the iPod Touch! http://www.gizmodo.com.au/2008/07/si..._ch argers-2/ That pretty much seems to cover the initial question. Thanks for the link Arfa |
#55
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![]() Cydrome Leader wrote: Michael A. Terrell wrote: Cydrome Leader wrote: your sad little computer fire has nothing to do with USB sucking ass. What is your fascination with sucking ass? You're the flamer with the burning SCSI cables, not me. Yawn... Another lame strawman. |
#56
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I once melted a SCSI cable by installing it "one off", thereby grounding the
B+. Fortunately, the computer wasn't damaged. |
#57
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![]() William Sommerwerck wrote: I once melted a SCSI cable by installing it "one off", thereby grounding the B+. Fortunately, the computer wasn't damaged. Most computers have no fuse, outside the power supply so the full output on the +5 volt rail is available. I sold a used XT computer years ago. the guy got it home & fired it up. The keyboard cable caught fire, and melted the +5 volt line all the way from the five pin DIN connector to the strain relief on the keyboard. |
#58
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Michael A. Terrell wrote:
William Sommerwerck wrote: I once melted a SCSI cable by installing it "one off", thereby grounding the B+. Fortunately, the computer wasn't damaged. Most computers have no fuse, outside the power supply so the full output on the +5 volt rail is available. I sold a used XT computer years ago. the guy got it home & fired it up. The keyboard cable caught fire, and melted the +5 volt line all the way from the five pin DIN connector to the strain relief on the keyboard. any non-4th rate motherboard even going back to the XT days had a fused keyboard jack. check out this gem of a motherboard http://upload.wikimedia.org/wikipedi...rd_Baby_AT.jpg |
#59
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"William Sommerwerck" writes:
Isn't it sad all this garbage is needed to send 5 volts down a cable? I've seen the USB 2.0 specs, and they're beyond unbelievable. You'd think what appears to be a simple interface would take only ten pages or so to define, but it takes 10 or 20 times that. And the code is far worse, I'm told. There's a reason why Firewire does so much better than USB2 at moving lots of data.... But I agree it is a great success at the universal aspect.... -- A host is a host from coast to & no one will talk to a host that's close........[v].(301) 56-LINUX Unless the host (that isn't close).........................pob 1433 is busy, hung or dead....................................20915-1433 |
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