fordke@ingr.com (Keith Ford x8614) (02/28/90)
Quick question... I know you cannot have two disk controllers in a PC, but can you have one for the floppies and one for the hard disk? I see controllers which are for hard disk only which doesn't seem logical if my first sentence is strictly true. -- _____________________________________________________________________ Internet: fordke@ingr.com \ "and the Trees are all kept equal UUCP: ...!uunet!ingr!fordke \ by hatchet, axe, and saw." -Rush
mlau@hpspcoi.HP.COM (Mel Lau) (03/01/90)
???? What is the problem ?? You can have a floppy disk controller and a hard disk controller. You are probably thinking that you can not have 2 hard disk controllers. This is true, but only due to the nature of the ROM bios and/or O/S. For example, Unix for 386 machines, do not use the ROM bios and can support 2 hard disk controllers. *Mel
hchen@silver.ucs.indiana.edu (H. Chen) (03/02/90)
In article <1640065@hpspcoi.HP.COM> mlau@hpspcoi.HP.COM (Mel Lau) writes: >???? >What is the problem ?? >You can have a floppy disk controller and a hard disk controller. >You are probably thinking that you can not have 2 hard disk controllers. > >*Mel I am not the person who asked this question. But I am curious to get the answer. And I have a question related to this. My friend have a two floppy disk drivers, both for 5.25" disk. I helped to add a harddisk with a controller card. It works. Now, if he wants to replace one of his 5.25" disk driver into a 3.5" one, does he need another disk driver controller card for 3.5 driver? (Someone suggested here that simply replacing a 5.25" drive with a 3.5" one will only give 360k capacity for the 3.5" drive.) So, can we have 2 floppy disk controller cards? Thank you in advance for giving the answers. --che
bobmon@iuvax.cs.indiana.edu (RAMontante) (03/02/90)
hchen@silver.ucs.indiana.edu (H. Chen) <37589@iuvax.cs.indiana.edu> : -replace one of his 5.25" disk driver into a 3.5" one, does he need another -disk driver controller card for 3.5 driver? (Someone suggested here that I successfully replaced my 5.25" B: drive with a 3.5" drive in a 1985 vintage xt-compatible, with no controller change. I use MSDOS v3.21, and my CONFIG.SYS file includes the line: drivparm=/d:1 /f:2 /h:2 I couldn't do this to the A: drive, because the BIOS and controller can't handle the 3.5" drive on their own (so they can't ever load the o.s. and CONFIG.SYS). But it works with no problem for my B: drive. Umm... I'm talking about a 720K 3.5" drive. I believe this will _not_ work for a 1.44M 3.5" drive.
feustel@well.sf.ca.us (David Alan Feustel) (03/04/90)
PCs can support two controllers. Most controllers have a jumper which selects either the primary or secondary disk controller address. The problem is that the bios does not support having a second controller. Anna Books sells C source for IBM PC and AT compatible bios programs which can be modified to support second floppy/hard disk controllers. Anna Books advertises in many PC magazines in the classified sections.
mep@stb.uucp (???) (03/05/90)
In article <37589@iuvax.cs.indiana.edu> hchen@silver.ucs.indiana.edu (H. Chen) writes: >In article <1640065@hpspcoi.HP.COM> mlau@hpspcoi.HP.COM (Mel Lau) writes: >>???? >>What is the problem ?? >>You can have a floppy disk controller and a hard disk controller. >>You are probably thinking that you can not have 2 hard disk controllers. >> >>*Mel > >I am not the person who asked this question. But I am curious to get >the answer. And I have a question related to this. > >My friend have a two floppy disk drivers, both for 5.25" disk. I helped >to add a harddisk with a controller card. It works. Now, if he wants to >replace one of his 5.25" disk driver into a 3.5" one, does he need another >disk driver controller card for 3.5 driver? (Someone suggested here that >simply replacing a 5.25" drive with a 3.5" one will only give 360k capacity >for the 3.5" drive.) > >So, can we have 2 floppy disk controller cards? > >Thank you in advance for giving the answers. > >--che You failed to mention the type of machine... that is AT, XT or ??? I just installed a 1.4meg 3.5" drive on my AT. My system has an NCL Hard disk/Floppy disk controller with two hard disks and two floppies attached. I now have a 1.2 meg 5.25 and a 1.4meg 3.5 working flawlessly... bite my tongue... It was plug & play since my bios supports both. marty
feustel@well.sf.ca.us (David Alan Feustel) (03/08/90)
It's common practice to have one 5.25" and one 3.5" floppy drive
connected to a single controller. You need DOS 3.3 to do this. Your
3.5" drive will read/write 720/1440 k diskettes with no problem.
--
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