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

revious Menu (Messages Menu) [60] Command >>>