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_The Doctor__

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Everything posted by _The Doctor__

  1. an 800XL made in HK will say Hong Kong on it's lable...
  2. the bodge of capacitors on the sio port... the caps on those three pins need to go. They hamper high speed sio, You can use a buffered sio splitter to get around that as well, but simply put snip the caps and you are good to go no matter what. Tons of threads on AA to cover it.
  3. I would not do much of anything to this 130XE, it's already upgraded nicely... I'd make sure the caps are snipped off the SIO Data in Data out and CMD lines...
  4. oh theres a bunch of reasons why I am about to do the updates... lot's of fixes and such over the years.
  5. maybe update your ultimate to latest firmware fixes... I have two am about to use the altera usb blaster on.
  6. try it with a fresh power on of everthing like describes but with an XF551 as well
  7. second side possibly may be non standard on the 3.5 as well depends on the firmware
  8. you could ask the man who made it, he's here on AA
  9. where is your mind... that's an awfully tiny and very high 'bra' but now that you mention it... the power of suggestion.
  10. okay giving this some thought while quickly skimming the data sheet, the chip needs to detect a transition to low for SOB... that means it had to be high at least once during startup, the datasheet suggest that it might be prudent to hold the sob high if it is not to be used. This may be why he connected it the way he did rather than just tying it to ground... so it transitions to low, if it stays low that's fine... if it's not to be used it gets held high according to the sheet... some slight differences in the chip over the years... but that's what I have as a thought. Give the sheet a once over and you see some notes added as well for the current differences for the differing forms.
  11. okay, what is the exact chip you are currently using that isn't behaving... if it implicitly states 2-14 it might be an issue... point us to the data sheet maybe.
  12. is your chip 1 Mhz chip? the Atari needs 2 Mhz or better... might be good to check
  13. it's understood the pinout will be different so I include this for those following along. edit for plcc
  14. If you have exchanged all chips and they are good as you say, that only leave socket and pcb pad trace problems... or a flaky ram chip that borderline works... possibly a timing issue... so make sure you exchanged ALL chips... pokey normally doesn't make ram fail... PIA can have some interaction though.. maybe you should have your friend talk with folks, the game of whisper down the ally never turns out too well.
  15. That's not what I see in the last posted schematic from mytek... am I confused, is there some sort of mix up? I took the image and enlarged it as well. Can you put all of you diagram/schema with just this section into a post for comparison... did a quick skim and didn't see each.
  16. even not for profit 501 c museums can end up having their contents auctioned off with proceeds going to the owners and bills.... You have to have a document indicating what and how your donated item must be handled even in the even the museum is closed, dissolved, bankrupted, or placed into estate status or otherwise if you wish to protect that which you offer to them
  17. yes but the cost to buy said cartridge is more than getting it from just about anywhere else...
  18. do your mean MMU changes? You may need to alter both the MMU and EMMU
  19. okay but we still do all of that counting by hand (in our head and design) and then can get an idea from there between the two. It's not that it matches up in the programming exact in that but we still can count the scanlines and frame it from there to what we are going to do on our target... if it's of no use to you it's understood and we can still use pencil and paper to do so... it's a matter of convenience and speed I guess, as it can give a hint to whats left to work with.
  20. None the less, it's useful to see the count during free form programming when working in/with multiple target and sources... 2600 to NTSC or PAL 8 bit etc...
  21. I am totally confused as to what is being done or requested... Atari BASIC allows for ml routines to be used, either by character strings method or pokes... back 1980 we were doing this... it's the reality of it's universe... you have a multitude of artifacted graphics choices in conjunction with those other choices as well as players and missiles to help in coloration as well, also use-able through BASIC
  22. Those two fix ups should be provided to SIKOR and he can include them in digital emails...
  23. depends on the DOS, some device are adaptive... and give data at the same speed as requests are made, some use a forced blanket setting and then there are problems.... Each DOS has it's own limit and SpartaDOS as well as SpartaDOS X have their one groups of filters and drivers... for instance a PClink driver can go all the way to ZERO... no problems at all.... some devices won't allow you to use both without switching it manually each time (a real PITA) ... others will do so happily or will do so within certain limits.
  24. the problem isn't in the casual request over time, it's in the barrage of them from the same persons that don't relent.... others see it and do the same carpeting of requests, again nothing wrong with a request for a single port of some kind... but when it's multiples across days or a week those time frames can be a bother.
  25. Yep the ingot is crap, any epoxy filled mess has been on any platform including the Atari... the commodore had a crap ton of their shit power supply shipped out with theirs as well, people put them in high air flow areas and had fans blow on them until they could be replaced. Thankfully we all know about them and keep vigil so it won't happen to anyone else if we can warn them quick enough
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