Mathy Posted December 2, 2018 Share Posted December 2, 2018 Hello Nezgar You could optionally install a switch to restore bit 5 to ANTIC access, at the expense of reducing a 320K XE to 192KB. I'm guessing this is what your switch does. 800XL without a Freddie MMU can't run Omniview 80 Column AtariWriter+ because the MMU does not have the separate ANTIC capability. Instead of installing the switch, you could just as well use a different pin on the PIA. Separate ANTIC and CPU access has nothing to do with Freddy. Freddy replaces the 74xx158/258s, the delay line and IIRC some refresh/cas/ras stuff. Separate ANTIC and CPU access is handled by the CO25953 (which should not be called (E)MMU, because that only leads to confusion). Sincerely Mathy Quote Link to comment Share on other sites More sharing options...
+Nezgar Posted December 2, 2018 Share Posted December 2, 2018 Instead of installing the switch, you could just as well use a different pin on the PIA. Separate ANTIC and CPU access has nothing to do with Freddy. Freddy replaces the 74xx158/258s, the delay line and IIRC some refresh/cas/ras stuff. Separate ANTIC and CPU access is handled by the CO25953 (which should not be called (E)MMU, because that only leads to confusion). I guess you could use a different pin for ANTIC banking, but it wouldn't be compatible with existing software.. Thanks for the correction about Freddy. Right - it's that XL's don't have a CO25953. Quote Link to comment Share on other sites More sharing options...
1050 Posted December 2, 2018 Share Posted December 2, 2018 The switch likely just shuts the upgrade off and on, this was a 'feature' on the AXLON so a nod to that system is sometimes included in whodunit upgrades. But the switch placement isn't in the standard lineup of Newell schematics. I would like to know where it is placed since this just makes them more flexible. It does something different with the bank switching that works exactly like the 130XE. Newell was full of it, it's not ANTIC compatible, and it's not like the 130XE because of that. It's just different from RAMBO scheme is the point to which he was speaking in the first place when the 'exactly' word got misused like a street walker. No FUCS given to clarity which is the typical Newell way to roll. It does misuse bit 5 and you can't make it ANTIC compatible or hueyjones70 looses his 80 column AtariWriter which was hard coded to misuse the street walker all day long. Again typically Newell code. I'm not surprised by the confusion, caused directly by Newell's sloppy thought process and total lack of communications skill set. Remember first with Newell always - no FUCS. Is this part the issue with confusion? Or is it the back side of the motherboard diagram with the confusing trace cuts and jumper connections A-A, B-B, C-C? Because some diagrams were cut off and didn't include that last sentence where A-A, B-B and C-C were made into jumper connections. IIRC the part where it says 1200XL only is a diagram of the 800XL and if you actually have a 1200XL, because of the no FUCS rule, you'll have to figure out how it was done on the 800XL first and then apply that insight to the 1200XL instead. Give that some thought first, then investigate if you can and get back to me if you think I can remember this same tiger trap I fell into back in 94. I might could help, but I'm not going to bother you if you don't bother me first. Best of luck in any case. NewellMemory.zip Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted December 2, 2018 Share Posted December 2, 2018 You can't get the 80 column OS with the ultimate 1MB. Sure you can. I have the 80 column version of AtariWriter running with the 80 column OS right here in an U1MB slot. Just select 576K memory and it works (separate ANTIC banking is required). 1 Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted December 2, 2018 Share Posted December 2, 2018 how about antic following? I have my 320XE set up that way... 192k sep antic 320k following antic... Can the specific newell 80 modified atariwriter be uploaded .atr be uploaded this would confirm my thoughts on the matter... the memory upgrade switch mod I had posted can be tested on it at least. Quote Link to comment Share on other sites More sharing options...
Mathy Posted December 2, 2018 Share Posted December 2, 2018 (edited) Hello Nezgar I guess you could use a different pin for ANTIC banking, but it wouldn't be compatible with existing software. It would be incompatible with software that is set to use specific pins on the PIA. Smart people don't code that way... But to be serious, using a different pin would mean you have all the RAM with software that's not fixed to specific pins and part of the RAM in software that is. Sincerely Mathy Edited December 2, 2018 by Mathy Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted December 2, 2018 Share Posted December 2, 2018 This is what I've tested and found to work with U1MB (using 576K mode): AtariWriter80 and Omniview80 OS.zip No fuss, no muss. 5 Quote Link to comment Share on other sites More sharing options...
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