mdullric@faui09.informatik.uni-erlangen.de (Meinhard Ullrich) (06/05/91)
I purchased a flicker fixer card (DeInterlace Card from MacroSystem, Germany) last week and run into some troubles. The handbook reads that in case of such troubles the user should plug in the jumper 300 in a different way. Well, I looked not only at the motherboard but in my pockets, my cupboard and on many more places, too, but I cannot find that damned jumper. The only jumper I found is called J36 and has only two pins (J300 is said to have 3 pins, so you can stick it in in two ways). The computer is an Amiga 2000 A (grr), board revision 4. Can anybody tell me the meaning of the Jumper J36. Has it an analogous meaning as the J300? What else can I do quickly. It is _very_ difficult to find the line to MacroSystems not engaged. Any help appreciated. Commodore, do you hear me? Meinhard Ullrich University of Erlangen, Germany E-Mail: mdullric@faui09.informatik.uni-erlangen.de
peterk@cbmger.UUCP (Peter Kittel GERMANY) (06/06/91)
In article <mdullric.676119142@faui09> mdullric@faui09.informatik.uni-erlangen.de (Meinhard Ullrich) writes: >I purchased a flicker fixer card (DeInterlace Card from MacroSystem, Germany) >last week and run into some troubles. The handbook reads that in case of such >troubles the user should plug in the jumper 300 in a different way. Well, I >looked not only at the motherboard but in my pockets, my cupboard and on many >more places, too, but I cannot find that damned jumper. The only jumper I found >is called J36 and has only two pins (J300 is said to have 3 pins, so you can >stick it in in two ways). The computer is an Amiga 2000 A (grr), board revision >4. On the A2000A board you change jumper J34 for the flicker fixer card. It switches the Tick signal going into pin 19 of CIA on U10 between the Tick from the power supply and the vertical sync signal VSY. It might be that this is a solder jumper on your board. The jumper J36 serves to tell the system you installed a second internal floppy (then you must shorten it). -- Best regards, Dr. Peter Kittel // E-Mail to \\ Only my personal opinions... Commodore Frankfurt, Germany \X/ {uunet|pyramid|rutgers}!cbmvax!cbmger!peterk
daveh@cbmvax.commodore.com (Dave Haynie) (06/07/91)
In article <mdullric.676119142@faui09> mdullric@faui09.informatik.uni-erlangen.de (Meinhard Ullrich) writes: >I purchased a flicker fixer card (DeInterlace Card from MacroSystem, Germany) >last week and run into some troubles. The handbook reads that in case of such >troubles the user should plug in the jumper 300 in a different way. J300 is the TICK jumper on the A2000b. It sets the timebase for one of the CIA chips to either VSYNC or the 50/60Hz tick from the power supply. Normally, you want the 50/60Hz line, as it's more accurate in most areas than the VSYNC signal. Some A2000's were made with J300 set to VSYNC. Apparently, some of these scan converters are sensitive to loading on VSYNC, and don't work well if J300 is in the VSYNC position. >Well, I looked not only at the motherboard but in my pockets, my cupboard >and on many more places, too, but I cannot find that damned jumper. If you have the German motherboard, there is no J300 equivalent. You're in the 50/60Hz position permanently. J300 was my idea. Its main use is to let you run an A2000 without the absolute need for an external 50/60Hz TICK. >The only jumper I found is called J36 and has only two pins As I recall, J36 is the "DF1: ID Enable" jumper, equivalent to J301 on the "B" motherboard. >The computer is an Amiga 2000 A (grr), board revision 4. I assume this deinterlacer is some kind of hack that lives under the Denise chip. I don't know anything about it in particular, but it's a certainty that normal scan converter cards, like flickerFixer and the C= one, which live in the video slot, won't work on the A2000a. The A2000a only has half a video slot; it's enough to support a Genlock, but it doesn't bring out the full digital video that's used by these scan converters. >It is _very_ difficult to find the line to MacroSystems not engaged. Sounds like you had better keep trying. It doesn't sound like there's anything we can do from the C= end of things. -- Dave Haynie Commodore-Amiga (Amiga 3000) "The Crew That Never Rests" {uunet|pyramid|rutgers}!cbmvax!daveh PLINK: hazy BIX: hazy "This is my mistake. Let me make it good." -R.E.M.