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About Martin72

  • Rank
    Space Invader
  • Birthday 03/16/1970

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  • Gender
  • Location
    Leersum, the Netherlands
  • Interests
    Programming with Atari 8 bit, Arduino and Raspberry PI.
  1. Hi Andre, I am also from the Netherlands and since last year I started again with Atari 8 bit. I also found a XF551 diskdrive and it doesn't work well, so I will follow this topic and maybe it also can help me to get it in a working state. I have the SIO2SD and I am very satisfied with it, the device is easy to use.
  2. Thank you all for the answers, also Philsan for the link where I can find the XEX files with the games I am searching for.
  3. I've download some ROM files (for example the romfile of the Activision game HERO) from Atariamania.com. With the RespeQT software I add these ROM files to an DOS 2.5 ATR file. I put this file to a SD card and put this card in my SD2SIO module. At the (at startup OPTION-key) DOS menu at the Atari 800XL I select option L and then I get the message: BAD FILE. Can someone explain what I'm doing wrong or can someone tell me how to use these Game ROM files with my Atari 800XL?
  4. A standard Atari 600XL has 16k RAM memory. I you only want to play the 800 and XL game cartridges the 16k memory is sufficient. But If you want to play a lot of 800XE cartridges or you want to play games from disk then it is recommended that you have 64k memory. It' s just more memory, it doesn't speed up your Atari! You can increase the standard memory of the 600XL to 64 k with the Atari 1064 memory expansion module or with a modification of 2 memory chips and some wires inside the 600XL. Hereby a link for more information about the 1064 module: http://www.atarimuseum.com/computers/8BITS/XL/xlperipherals/1064.html The last option you need some technical background and a soldering station, also a link for a description: http://atrey.karlin.mff.cuni.cz/~pavel/atari/600xl64Ka.html.
  5. Thank you for your answer. It's in fact very simple: single space + END is just a label! It is used in examples of the book "The Atari Assembler", and I have read in the Atari Assembler Editor about the .END directive and that is used to tell the assembler that is end of program. Your explanation of RTS is clear for me, the debugger of the cartridge doesn't properly process RTS and when I use the cartridge I use the .END directive. The coming week I hope that I will receive the Mac/65 cartridge that I bought at Ebay, so after I finished the book "The Atari Assembler" I will continue with the Mac/65 cartridge.
  6. I started a few months with learning (again) machine language with the book The Atari Assembler. I use the Atari Assembler Editor cartridge for do the exercises and examples. I have a question about the Atari Assembler Editor. I saw that there are two different END directives in the Atari Assembler Editor: END and .END When I use END I use one space after the linenumber and with .END I use 2 spaces. Can anyone tell me what the difference is between these two? Another question: when I use RTS as end of my program, and I start this program from the debugger then after the program ends, the next time I start the same program the program crashes. With the END directive I don't have this problem.
  7. I tried also normal rf but this also doesn't work.
  8. So what i understand is that it is a known problem. Is it possible to make a modification to the Atari computer that it works fine with a lcd tv?
  9. I have a new LCD tv and i like to use it with my Atari system and use the scart input. But i have no display. I tried it with an Atari 600XL and an Atari 65XE (PAL). The same problem occurs with my Super Nintendo, but my old Xbox works well with this lcd tv. I know the computers are good working because with my old crt screen it works properly. I've heard that some old systems outputs a signal that is not in 100% sync regarding what the TV expects from a composite video signal. Older TV's and monitors were not so picky, but a new LCD may not sync properly on a such signal. Does anyone know a solution for this problem so i can use my great Atari with a modern lcd tv.
  10. I play this game often and have never problems with this original Atari XL game cartridge.
  11. James, thank you for your clear explanation of the additional pcb in this drive. It was not clear for me what the purpose is of this pcb. Indeed, the head is banging against a stop, but this happens also when there's no diskette in the drive after power on. So there's something wrong, and i will check this out after my holiday. Regards, Martin
  12. I used a single density disk with DOS 2.0. But even without a disk is the head always in the end position and tries the step-motor to move the head beyond the end position. Martin
  13. When i turn off the 810 and manually move the head to another position and then turn on again, the head moves to the same old (maximum or minimum) position again. Thanks for the link to the diagrams. I see there are 2 possibilities: FD1771 in A105 or FD1771 on PCB CO17227. Do you know what the meaning is of this auxiliary pcb?
  14. I have bought recently a 810 diskdrive. The diskdrive is complete and the case is in good condition. When i connected the drive to my computer the following happens: - the Atari computer recognize there's a drive - the led on the drive illuminates - the diskette spins continuous - the head don't move but once in the let say 10 seconds there's a strange sound audible at the stepmotor (it seems that the drive tries to move the head beyond the maximum (or minimum) position). I dowloaded the Service manual and i see a difference with this drive. In the socket of A105 of the Side 810 pcb there's another pcb with Atari code CO177227. Do someone know what the meaning is of this pcb? At this PCB there's the FD1771B disk controller at socket A203. Can someone help me with a circuit diagram of this pcb? I have attached a picture of the 2 pcb's.
  15. Today, i found the solution for my problem: In my Atari 600XL there was placed a processor with text: UM6502I from UMC. I have replaced this by a processor of an old 600XL board: CO14806-12. The problem is gone and the grey XE cartridges works also in my 600XL! So i think there's a difference in the processors. The UM6502I is a type used in a XE computer and seems to work in a 600XL but not for 100%. Thank you all for the responses!
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