Picked up a Mini-Micro-4 FDC, PII-158B. Here is the layout for the board:
https://th99.bl4ckb0x.de/i/C-D/50273.htm
I'll be connecting two known working floppy drives for my 5160 PC/XT, a 1.44 3.5" and a 5.25" 1.2M. The 1.2M floppy is a Teac FD-55GFR ( http://maben.homeip.net/static/S100/teac/diskette/Teac FD-55GFR 1.2MB floppy.pdf ). When I look at the setting for jumper block JP5, I'm not entirely clear on how to set the jumpers for mixing these two high density drives on the same twisted floppy drive cable. I'll make the 3.5" 1.44 my a bootable A: drive, and the 5.25: 1.2M drive B:
Based on the diagram, I'd assume the following jumper configuration to support what I want to achieve:
JP5A: Open
JP5B: Open
JP5C: Open (?) (would think this would be a no op)
JP5D: Open (?) (would think this would be a no op since they are the same for both HD drives)
JP5E: Open (?) (this one seems to be in conflict with having both a 1.44 and 1.2M drive)
JP5F: Open
JP5G: Open
JP5H: Open (?) (this one seems to be in conflict with having both a 1.44 and 1.2M drive)
Advise? I've had a mini-micro 2 drive FDC that I just could never get working after having tried many variations - I just kept getting an Error 2h when trying to boot from it an a read failure after booting up from my HDD, but the FDC BIOS appeared to initialize. I currently use a FTG FA-100, and both drives work fine with it, except it corrupts my XT-IDE attached CF boot drive when the 5.25" floppy is attached (so I just disconnected the 5.25" drive, which prevents that CF drive corruption - really odd, but after months of trying many variations I just gave up. I am hoping a third FDC will do the trick (hence, me trying the Mini-Micro-4 FDC, PII-158B as my last resort before giving up and just keeping the FTG FA-100 and only attaching the 5.25 drive in the rare instances I need one (and boot off the 3.5" drive without the CF card). If this attempt fails I thought maybe putting the drives on different cables since the board supports four drives on two different cables. I read somewhere that there is a terminator on 5.25 drives that can cause issues with two different HD floppies on the same cable.
I know, I'm being a bit stubborn trying to get both HD drives working well and working without the CF corruption; the fight with the machine has become personal!
Regards,
Mike
https://th99.bl4ckb0x.de/i/C-D/50273.htm
I'll be connecting two known working floppy drives for my 5160 PC/XT, a 1.44 3.5" and a 5.25" 1.2M. The 1.2M floppy is a Teac FD-55GFR ( http://maben.homeip.net/static/S100/teac/diskette/Teac FD-55GFR 1.2MB floppy.pdf ). When I look at the setting for jumper block JP5, I'm not entirely clear on how to set the jumpers for mixing these two high density drives on the same twisted floppy drive cable. I'll make the 3.5" 1.44 my a bootable A: drive, and the 5.25: 1.2M drive B:
Based on the diagram, I'd assume the following jumper configuration to support what I want to achieve:
JP5A: Open
JP5B: Open
JP5C: Open (?) (would think this would be a no op)
JP5D: Open (?) (would think this would be a no op since they are the same for both HD drives)
JP5E: Open (?) (this one seems to be in conflict with having both a 1.44 and 1.2M drive)
JP5F: Open
JP5G: Open
JP5H: Open (?) (this one seems to be in conflict with having both a 1.44 and 1.2M drive)
Advise? I've had a mini-micro 2 drive FDC that I just could never get working after having tried many variations - I just kept getting an Error 2h when trying to boot from it an a read failure after booting up from my HDD, but the FDC BIOS appeared to initialize. I currently use a FTG FA-100, and both drives work fine with it, except it corrupts my XT-IDE attached CF boot drive when the 5.25" floppy is attached (so I just disconnected the 5.25" drive, which prevents that CF drive corruption - really odd, but after months of trying many variations I just gave up. I am hoping a third FDC will do the trick (hence, me trying the Mini-Micro-4 FDC, PII-158B as my last resort before giving up and just keeping the FTG FA-100 and only attaching the 5.25 drive in the rare instances I need one (and boot off the 3.5" drive without the CF card). If this attempt fails I thought maybe putting the drives on different cables since the board supports four drives on two different cables. I read somewhere that there is a terminator on 5.25 drives that can cause issues with two different HD floppies on the same cable.
I know, I'm being a bit stubborn trying to get both HD drives working well and working without the CF corruption; the fight with the machine has become personal!
Regards,
Mike