Register or have you forgotten your password?
|
|
Register or have you forgotten your password?
|
All times are GMT -6. The time now is 07:58 PM.
| Welcome to Forum, please register to access all of our features.
|
|
| Amiga Hardware Issues and discussion This forum is dedicated to the discussion and resolution of issues related to Classic and Next Generation Amiga hardware. Got a problem with a piece of hardware? Click to speak. |
 |
|
|
Thread Tools | Display Modes |
10-07-2011, 09:18 AM
|
#1 | ||||||||
|
Merely Curious
Join Date: Oct 2011
Posts: 6
|
A500 external and internal floppy conflict
Hey ALL
I'm having a strange issue with my Amiga 500. When I boot with both floppies attached booting goes to first screen both drives go insynch and start reading together like they are both fd0. Of cuz this cuz a error message appears. I took external floppy part. It's the same fb-354 but with different control board. When I disconnect external floppy drive my 500 boots up no problem. HELP! Thanks. |
||||||||
|
|
|
10-07-2011, 11:36 AM
|
#2 | |||||||||
|
Technoid
Join Date: Mar 2007
Posts: 280
|
Re: A500 external and internal floppy conflict
Quote:
|
|||||||||
|
|
|
|
10-07-2011, 11:56 AM
|
#3 | ||||||||
|
Kindred of Babble-on
|
Re: A500 external and internal floppy conflict
Either that (ie. the floppy interface board) or a 8520 (U8). Check pin 22 of the floppy port (_SEL1). While the internal drive is operating it must not be low. You can also try swapping both 8520 to see if that changes anything. (If this is the problem your printer port will get non-functional.)
Last edited by Zac67; 10-07-2011 at 12:03 PM.. |
||||||||
|
|
|
|
10-07-2011, 12:26 PM
|
#4 | ||||||||
|
Too much caffeine
Join Date: Mar 2004
Posts: 110
|
Re: A500 external and internal floppy conflict
Ah, I remember back when I had the A500 in use. Broken CIA chips could do strange things to floppy drives. I had one that was defective, and did not know about this at first. The symphtom was that every time a new disk was inserted, the internal drive started to "chew" on the disk until it was unreadable. We thought there was somethink wrong with the disk and inserted a new one, and then that was gone as well.
Replaced the CIA 8520 chip and it was ok again. |
||||||||
|
|
|
|
10-07-2011, 03:11 PM
|
#5 | ||||||||
|
Technoid
Join Date: May 2010
Location: THE PEG CANADA
Posts: 159
|
Re: A500 external and internal floppy conflict
A quick test would be swap the cia chips and see if it works. if the drive works then it could be that but on the other hand it could knock out a mouse or something.
lost
__________________
A3000D 2 meg chip, 4 meg fast,128 meg zorram! 36 gig hd, A3640, Indivision ECS. A500 1 meg chip, 2 meg fast, 1.3/2.04, a500 x 5. Samsung lappy Win98 machine for Miggy network applications (mapped drives with server) http://www.youtube.com/user/lost666loven?feature=mhum |
||||||||
|
|
|
|
10-07-2011, 05:07 PM
|
#6 | ||||||||
|
Merely Curious
Join Date: Oct 2011
Posts: 6
|
Re: A500 external and internal floppy conflict
Thanks a lot guys. I swapped 8520 chips....and it works. I'm formating floppy right now. Will need to get replacement chip. Thanks again!!
|
||||||||
|
|
|
|
| Bookmarks |
| Tags |
| 500 , a500 , conflict , external , floppy , internal , problem |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
