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Posts posted by MarkO



    Oh great... okay, so what i'm currently doing is drawing a line across the screen and checking for the byte in that line... if i check for multiple instances, what are the odds of the RAM in those gaps having the same pattern... or can i just write to that space and be sure of it's contents?


    i think this goes quite a way to disproving what high voltage said about the A2 flooring the C64 for programming though!


    Your Loader Program is in AppleSoft.. This Won't run on an Apple ][ with the Language Card..


    Will it invalidate your Test to move the HELLO and SYNC Programs to a System Master Disk with the AppleSoft, or Write an Integer Basic Loader for your Disk??




    Fourteen lines of actual code since it just runs in the default text mode. i've attached a disk image which draws a line of inverted spaces a few lines up from the bottom of the screen and, if the sync routine works, the top left byte of the screen RAM should keep changing.




    It'd be nice to get a definitive answer to what this technique works on, so whatever you've got time to throw it at would be good. =-)




    Your Disk Images is now Damaged.. The Zip File is 122 Bytes, and the sync_test.do is Zero Bytes..

  3. i've been tinkering a little and, according to this page, the "value at $c054 [is] equal to the byte being displayed" - that's very useful and i have "working" test code based on it that AppleWin seems happy with, but do we know how consistent this technique is across the range of hardware?


    And if we don't have a definitive answer, is there anyone with real hardware and a way to transfer files from teh interwebs who fancies running some test code so we can answer that question? =-)


    How long is your Code?? A small Assembly Language routine can be typed into a Real Apple, also a Bootable Disk Image can be made and Downloaded and Transfered to your favorite Apple..


    I have some real Hardware.. My Apple ][ will run for a few minutes before freezing. My Apple ][+ needs some Hardware Transplants, and I have a bunch of Apple ][e, both Enhansed and Not Enhansed, and Two Apple ][+, ][e Mice..

  4. Besides the Mockingboard and the Mouse Interface, the Echo+ also has a 6522.


    Jameco still sells new 6522's, so for Apple Owners that don't have a Mockingboard or Mouse ( or Echo+ ) a simple Slot Interface Card with a 6522 installed on it could be designed to provide the Timing. A very Cool implementation would be something like the No-Slot Clock, but using a 6522.. Something in the $15.00 - $25.00 range for either.. Or maybe even better would be a Clone of the Apple Mouse Card, because IIRC, the Apple //c Mouse was electrically identical to the Apple ][e Mouse, just without the Mouse Card..

  5. I would like to add, "iWoz", By Steve Wozniak and "Adventures of an Apple Founder", by Ronald G. Wayne.


    I also placed some links to "Out of the Inner Circle: A Hacker's Guide to Computer Security" and "Bit-by-Bit:An Illustrated History of Computers [Paperback]" over on the Apple I production numbers thread..


    Also, "Out of the Inner Circle" was scanned to a PDF and can be found in a Post on the thread, "BYTE Magazine".

  6. Is there any limit on the size of the SD card that you can use with this? If there isn't then it would theoretically be possible to load up an SD card with all the Apple II software the //c is capable of running. I'm definitely interested.


    The Limit is usually the Interface Circuitry..



    SDSC (SD): 1 MB to 2 GB, some 4 GB available.

    SDHC: 4 GB to 32 GB

    SDXC: ≥32 GB to 2 TB

    ( from Wikipedia )


    I would guess that the current Atmel Chips ( this project uses the AT Mega 328 ) support SDHC as well as the older SDSC so the Limit would be 32GB.


    Here is another Atmel Project with SDHC Support, SD/SDHC Card Interfacing with ATmega8 /32 (FAT32 implementation).

  7. Thanks much.


    I also have the Steven Levy book, but it too is in storage. Hopefully my local library has a copy.



    I spent a few minutes looking in Hackers, but it's a big BOOK.. iWoz I have on Kindle, so it was Search-able.. ;)


    For classic Computer Information, I also have "Out of the Inner Circle: A Hacker's Guide to Computer Security" and "Bit-by-Bit:An Illustrated History of Computers [Paperback]"


    I highly recommend ALL Four of these books....

  8. Off the "Top of My Head", I think it was 200..


    Looking in iWoz, the Byte Shop placed an order for 100, and the beginning of Chap 13, Woz states "By Early 1976, we had sold maybe 150 computers"


    Hackers, by Steven Levy IIRC has similar Information, but I have not located it yet...


  9. I would really be interested in an Apple ][ Sub-Forum here at AtariAge.. Especially pertaining to Programming or Game Development..


    I have been a member at Applefritter for almost 18 months, and the Apple ][ focus is about Classic Hardware, and using the Apple ]['s with Classic Software, with a small focus on new Hardware ( like Flash Drives for Storage ).. There is very little Programming topics...



    I was directed to AtariAge by JamesD and his link to (Apple ][) It's on like Donkey Kong...


    I am just getting back into using the Apple ][, I started in JAN-1982 with the Apple][+ at High School..

    I have 8 Apple ][e's, 2 Apple //e Enhanced Motherboards, an Apple ][, and Apple ][+ and 2 Apple IIgs. I also have a Commodore SX-64 with a few VIC-20's, C-64 and 2 C-128 of unknown operating status, and a few ( like a dozen ) Sinclare ZX-81/Timex-Sinclare 1000's.


    Here is a picture of me, ( I'm on the left ) with my first Apple ][ purchase.





    • Like 1


    << SNIP >>


    I work from the command line almost exclusively. Tab completion is a must nowadays. Anyone using bash or zsh has it. Not sure about the older ones like csh and ksh. I just wish the Windows shell (or whatever it's called) had it. It probably needs tab completion more than any other shell!


    I live on the Command Line too.. It must have something to do with starting with the Apple ][+, then moving to PC-DOS 2.1 and a UNIX Clone called Coherent..


    I know for a fact the Korn Shell ( ksh ) does TAB Completion, because I worked exclusive on an NCR machine with UNIX System V.. Also, Windows XP, Vista, 7 and 8 do TAB Completion, and Windows 2000 can be made to do it with a Registry Hack..


    Better yet it to "ditch" Micro-Soft's Command Interpreter and get 4DOS/NT/OS2 from JP Software... <ftp://ftp.jpsoft.com/oldver>

    The 4DOS version 7.50 ( 750 ) is unrestricted and the other Two 4NT and 4OS2 are Shareware..


    Square brackets in a name I find annoying because I do use them for globbing. I think in a UNIX environment they should be used in file names sparingly to avoid confusion.


    The only problem I have with using quotes is I always forget to type in the opening quote until after I type/paste the file name. Every single time. :dunce: lol You also can't use globbing within them obviously.


    I prefer File Names without any Spaces...



    The reason the dates are first is so that a YYYYMM<tab> will almost always be all you have to type to get the complete file name to pop up. This is very handy when trying to sort out what's what and PDFs are getting moved all over the place. However, I suppose for most people just downloading and reading them that's much less of a concern.


    YYYY-MM probably would not be a bad idea. Just as easy to type and easier to read. Torrents probably should have been done like that.


    I like the Name Format of YYYY-MM or YYYY-MM-DD if you have Daily Files....

    • Like 1

  11. I found this

    UK Apple IIe It only has mono Composite out according to Seller - IT doesn't have the PAL card.


    Am I right in saying the PAL card is the only way to get colour on a UK display? Or are there other work arounds?


    I see that this Auction is now over, but...


    I only have U.S. versions of the Apple ][e, and don't know a lot about the Euro Apple ][e, but according to the Wikipedia Page on International Apple ][e's, the text states:


    "In some countries these localized IIe's also support 50 Hz PAL video instead of the standard 60 Hz NTSC video and the different 220/240 volt power of that region. An equivalent of the "PAL color card" for the earlier Apple II europlus model was integrated into the motherboard of these IIes, so that color graphics are available without the addition of a slot card."



    I would guess that since the Monitor is 230V and 50Hz, that would make the Apple ][e PAL and the Color is Built In..

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