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#1Mb Agnus Compatability

10 messages in this thread

#115192From: PAUL OLSONJul 31, 1990 9:17 PM

Does anyone know of any incompatabilities between pre-rev 6.x A2000 motherboards with the 1Mb Agnus? Based on the date that I bought my machine, I suspect that it has a 4.x motherboard. The local dealer said that if I had a pre 6.x board, that my board would have to be upgraded. Is anyone familiar with this, or has anyone heard of anything to this affect? I'll know later this week what rev my mother board is when I install the 2Mb memory expansion. If there aren't any incompatabilities, I'll probably install the chip myself. The software I'm running is DPaint III, Photon Paint 2.0, DigiView Gold 4.0, Pixmate 1.?, DigiPaint 3, and Transfer 24 (a DigiView subset). Are there any problems with any of these packages with the 1Mb Agnus and a 4.x A2000 motherboard? Let me know. Thanks, Paul

#115244From: John Sobernheim(TCR)Aug 1, 1990 12:28 AM

Paul, Some early revision motherboards have had problems with the 1MB Agnus modification, some have not. I've got a 4.1 motherboard with the 1MB agnus installed, works like a champ. Try it… see if it works or not and go from there. -John

#115433From: PAUL OLSONAug 2, 1990 8:48 PM

John, Thanks. I'll take a look at my motherboard. Hopefully I can get away with doing the installation for about $100 instead of going to the shop. Paul

#115492From: John Sobernheim(TCR)Aug 3, 1990 1:51 AM

Paul, I don't think looking at the motherboard will solve your problem. Talk to your dealer, have him install the chip and then test out the system. If it works he'll be happy with the sale and you with your 1MB CHIP. If it doesn't, have him work with you on a fix and pay the 1/2 labor for his time. -John

#115252From: MicroSearch/Greg WhiteAug 1, 1990 12:45 AM

Paul, Some 4.x boards needed to be upgraded, some don't. I have had a 4.2 board work fine with a 1 meg Agnus, but had to upgrade a 4.3 to get it to work. The upgrade is relatively simple and takes 30-45 minutes. Greg Greg White / MicroSearch 72230,1617 We listen to our customers..carefully

#115434From: PAUL OLSONAug 2, 1990 8:50 PM

Greg, What do you mean, the 1Mb worked with a 4.2 motherboard but you had to upgrade to a 4.3? Did you find some incompatabilities even though the 4.2 board appeared to work properly? Paul

#115480From: MicroSearch/Greg WhiteAug 3, 1990 12:54 AM

No, it was a 4.2 motherboard that worked fine before the 1 meg upgrade but had strange problems after. Doing the few small changes that comprise the upgrade procedure fixed the problem. I am not talking about changing out the motherboard, just doing the mods. Greg Greg White / MicroSearch 72230,1617 We listen to our customers..carefully

#115362From: dan harrisAug 2, 1990 1:22 AM

I installed the 1meg agnus on my rev 4.2 A2000 with no apparent ill effects. I installed it myself and made no alterations to the motherboard except to cut one jumper trace. I was able to run dpaint iii and photon paint.

#115435From: PAUL OLSONAug 2, 1990 8:53 PM

Dan, Thanks for the info. In my t-shirt business, I depend on those two packages A LOT!! Knowing that they work properly with the 4.2 board and a 1Mb Agnus takes some worry off my mind if I have a 4.2 board. The shop said that there were some questionable incompatabilities, but they didn't go into it. From the sounds of all the replies I'm getting, it sounds like they may be either forcing the upgrade issue, or trying to cover themselves in case the 4.x board doesn't work with the new Agnus. I suspect the latter. Paul

#115483From: MicroSearch/Greg WhiteAug 3, 1990 12:55 AM

Dan, Didn't you also have to move a jumper, in addition to cutting the trace. Greg Greg White / MicroSearch 72230,1617 We listen to our customers..carefully