75 lines
2.4 KiB
Plaintext
75 lines
2.4 KiB
Plaintext
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Public Message
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Message # 2712 *MM1 TECH Echo*
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To : Warren Hrach
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From : George Hine
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Subject : HARDDRIVES
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Date : 94/03/09 05:54:00
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Dear Warren:
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I have a used Quantum 40 meg Hard Drive with a SCSI 50 pin cable
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connection and just next to this is another connector with 16 pins.
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This drive has been tried in an MM-1 and powers up ok and tries to
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seek, but will not format. The only information I have is from the
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drive itself. There is an apple decal with a 40 in the middle, a
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quantum barcode strip with Q250 and 74-45004, a decal on a chip
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with a 1987 date. I was wondering if anyone had any information on
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this drive.
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Thanks George
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--- FLAME v1.0
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* Origin: The King's Market BBS (1:104/115)
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Public Message
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Message # 2728 *MM1 TECH Echo*
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To : All
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From : James Jones
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Subject : voltage on serial ports
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Date : 94/03/12 18:01:17
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Today I went out and bought a Mouse Systems trackball--it can do both
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Mouse Systems packets (which is what Logitech at least used to use, so I
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figured it would work for me) and Microsoft (two-button) flavor at the
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throw of a switch, so it sounded like just the thing.
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It wasn't. It almost worked, but it had a great aversion to moving up
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and down. I took it back, but decided to ask them to try it on one of
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their PClones...and for them it worked.
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What I eventually found out, after some manual reading, a voltmeter
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purchase, and some measuring, is that the trackball wanted +12VDC
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+/- 10%, and it was getting 9.56 or 9.95 VDC (one of the lines held high
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measured one, the other the other). Measurements were made between the
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pins and the outer shell (protective ground).
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So...it sounds like my paddle board isn't putting out the volts that the
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trackball wants. (It's enough for my Logitech mouse, which probably
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wants +5VDC...) Am I correct in my inference? Did I measure relative
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to the right thing? If I'm right, what can I do about it? Advice is
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welcome.
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--- RiBBS v2.10
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* Origin: Ocean Beach BBS 619-224-4878 MM1 TECH moderator (1:202/343)
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=*= FIDO ECHO MESSAGES MENU =*=
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<1> Scan \
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<2> Read > OS9 Echo mail
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<3> Leave /
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<4> Scan \
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<5> Read > CoCo Echo mail
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<6> Leave /
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<7> Scan \
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<8> Read > CoCo_Club Echo mail
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<9> Leave /
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<A> Scan \
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<B> Read > MM1_TECH Echo Mail
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<C> Leave /
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<G>o back to Main Menu
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<P>revious Menu (Messages Menu)
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[60] Command >>>
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