Thread View: net.micro.atari
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Started by S.C. Pierson [Stephen]
Fri, 15 Nov 1985 12:21
256K 1200XL
Author: S.C. Pierson [Stephen]
Date: Fri, 15 Nov 1985 12:21
Date: Fri, 15 Nov 1985 12:21
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I've currently upgraded a 1200XL to 256K using the article from the september issue of Byte. Their upgrade covered the 800XL. Now, here's the problem. When we run Ramsgl or Ramdbl and format a drive, the screen turns to blue and white horizontal stripes from top to bottom. The rest of the computer works fine, it's just when we try to access the extra ram for ramdisk that it seems to fail and lock-up. We're using the source code mentioned in the Byte article, and I feel that may be the problem. Has anyone else made this upgrade to the 1200XL? Any assistance will be greatly appreciated. Once we get a working machine, I'll summarize and post. Thanks again. Steve Pierson AT&T Network Systems Atlanta Ga. 404-447-2142 c 583-2142
Re: 256K 1200XL
Author: C. David Young
Date: Mon, 18 Nov 1985 13:49
Date: Mon, 18 Nov 1985 13:49
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Steve, That 256K RAM upgrade in BYTE was a real dog. We have got a 256K upgrade (256KXL) that will make your 1200 130 compatible. You can buy it without RAM for $50 or with for $100. The reason that the BYTE upgrade is such a dog is that it ends up including the stack in the bank switch area. Worthless! David Young -------
Re: 256K 1200XL
Author: Bill Dippert
Date: Mon, 18 Nov 1985 18:18
Date: Mon, 18 Nov 1985 18:18
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> I've currently upgraded a 1200XL to 256K using the article from the > september issue of Byte. Their upgrade covered the 800XL. Now, here's > the problem. When we run Ramsgl or Ramdbl and format a drive, the > screen turns to blue and white horizontal stripes from top to bottom. > The rest of the computer works fine, it's just when we try to access > the extra ram for ramdisk that it seems to fail and lock-up. We're > using the source code mentioned in the Byte article, and I feel that > may be the problem. Has anyone else made this upgrade to the 1200XL? > Any assistance will be greatly appreciated. Once we get a working > machine, I'll summarize and post. Thanks again. > Steve Pierson > AT&T Network Systems Atlanta Ga. > 404-447-2142 c 583-2142 I am also interested in how readily converted the 1200XL is. My understanding from some of the previous posting is that the group in southern California is converting 800XL's commercially and that they are compatible with the 130XE. This is what I really want -- 256K 1200XL and 800XL that are totally compatible with the 130XE. I do not think that the source code mentioned in the Byte article does this -- am I correct in my thinking or am I wrong? Also, does not the 1200XL use a somewhat unique OS? I never saw any differences in what programs that I ran, the 800XL and the 1200XL seemed to run the same programs equally well, but the AMODEM4.2 program that would run on both the 1200XL and the 800XL will not run on my new 130XE so there is something different about the XE's. (Probably having to do with their use of joystick port B (the non-existant joystick ports 3 and 4 are used somehow for the access to the additional RAM locations.) Is there anyone doing the 256K modifications in the Portland (OR) area? If so, publicize how to get ahold of you. Thanks in advance! --Bill--
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