computer card/slot confusion [message #25207] |
Thu, 17 November 2005 06:32 ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
steve f
Messages: 238 Registered: May 2009
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Master |
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Hi Everyone, I started this topic in the general forum. Wayne asked me to bring it here. I want to use a LMS card (Linear X) in a "modern" computer. Here's the problem. The card requires the use of an ISA slot. Computers don't have them anymore. Solutions and suggestions please. Steve
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LMS ISA card compatibility [message #25208 is a reply to message #25207] |
Thu, 17 November 2005 11:28 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
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Wayne Parham
Messages: 18757 Registered: January 2001
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Illuminati (33rd Degree) |
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I told you I was going to do some research and report my findings under your thread. I intend to do that this week; Sorry, I haven't done it yet. But I will.There are two ways you can go besides using the LinearX supplied converter chassis. One is to use a full-sized motherboard to build a PC. Another is to use industrial control modules. I've used several of those for various projects, and they're essentially just rugged and often miniaturized PC boards. You'll still need a full sized chassis because the LMS takes a full-length slot. But my point is there are other options besides traditional PC motherboards. Please note that there is more involved than just finding a PC with an ISA slot. The LMS card is incompatible with some slots. My guess is that it needs buss speed to be the same as the old original 4.77Mhz IBM PC. Newer computers often ran the buss faster, and occasionally, some ISA cards wouldn't work with the faster buss speed. So you have to test for electrical compatibility as well as physical compatibility.
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Re: LMS ISA card compatibility [message #25210 is a reply to message #25209] |
Thu, 17 November 2005 15:04 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
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Wayne Parham
Messages: 18757 Registered: January 2001
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Illuminati (33rd Degree) |
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I just got off the phone with Chris at LinearX. I'm glad I spoke to him, because after seeing two of David Lee's computers not work with LMS, I suspected the LMS card may be sensitive to buss timing or something. But Chris tells me that he has never run across a system with an ISA buss that wouldn't work with the LMS card.I have seen some boards not work in ISA slots. I did a little checking to refresh my memory, and the original standard ran the buss at 8.3Mhz and (naturally) had specific timing requirements for setup and hold of each signal line. Some cards are intolerant of deviation from these specs, so as later manufacturers started superceding it, those cards would not work. But the position of LinearX is that the LMS board is compatible with any motherboard that has an ISA slot.
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Re: LMS ISA card compatibility [message #65001 is a reply to message #25208] |
Tue, 30 November 2010 08:39 ![Go to previous message Go to previous message](/forum/theme/AudioRoundTable/images/up.png) ![Go to next message Go to next message](/forum/theme/AudioRoundTable/images/down.png) |
Adveser
Messages: 434 Registered: July 2009 Location: USA
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Illuminati (1st Degree) |
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Wayne Parham wrote on Thu, 17 November 2005 11:28 |
I told you I was going to do some research and report my findings under your thread. I intend to do that this week; Sorry, I haven't done it yet. But I will.
There are two ways you can go besides using the LinearX supplied converter chassis. One is to use a full-sized motherboard to build a PC. Another is to use industrial control modules. I've used several of those for various projects, and they're essentially just rugged and often miniaturized PC boards. You'll still need a full sized chassis because the LMS takes a full-length slot. But my point is there are other options besides traditional PC motherboards.
Please note that there is more involved than just finding a PC with an ISA slot. The LMS card is incompatible with some slots. My guess is that it needs buss speed to be the same as the old original 4.77Mhz IBM PC. Newer computers often ran the buss faster, and occasionally, some ISA cards wouldn't work with the faster buss speed. So you have to test for electrical compatibility as well as physical compatibility.
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Wayne, this is why us Computer Electronics guys slow down the PLL chip's operating frequency in a computer by various means. It is usually done to overclock the entire computer close to it's electrical tolerance instead of OC the CPU.
I've gotten a 700Mhz Celeron running at 100Mhz Bus up to 1100Mhz with a 166Mhz Bus. Slowing down is much easier than speeding up. It's a time consuming task to get something that works, but it can be done.
http://adveser.webs.com/
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