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voy

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    Sally CPU C014806-35

    in Atari 8-Bit Computers

    Posted

    This version of Sally is very stable and the only downside is the high temperature. I use it with Rapidus, Ultimate 1MB (first version from Candle), VBXE v2.1 and Evie (prototype sound card by Pasiu). IDE Plus rev.F, SIDE1, Ultimate Cart, AVG Cart (the first version with a black and white sticker) also work without any problems. Motherboard is C103579-001 Rev.1.

    • Like 1

    Sally CPU C014806-35

    in Atari 8-Bit Computers

    Posted

    4 hours ago, Dinadan67 said:

    I want to replace a mexican made CPU with a more reliable type. I found a vendor on Ebay which sells CPUs which are labeled "C014806-35 (C) Atari 1980" without any additional vendor or logo. Does anybody knows if this is a good batch?

    I use it in my 800XE with a Rapidus card. It works very well, although it overheats a lot. So I bought a Fischer Elektronik ICK40B radiator and Thermalright Extreme II 85x45x1mm 14.8W thermal pad. :)

     

    IMG_20230428_131332.jpg

    • Like 2

    gravity snake

    in Atari 8-Bit Computers

    Posted

    On 1/30/2020 at 4:36 PM, voy said:

    Yesterday I finally managed how to fix this game. ?

    You need the unLZ4ed version from Baktra (46030 bytes long). Change 6 bytes in the offsets listed below to $01.

    - $0611 (there is an address $D3FD)
    - $0628 ($D3F9)
    - $361C ($D3F5)
    - $3624 ($D3F1)
    - $676F ($D3ED)
    - $6798 ($D3E9).

    There is a certain regularity. As you can see, the address is decreased by 4 bytes with each subsequent occurrence. :)

    Do you want this version to be different from the basic one? Then edit the data in the locations below:

     

    - $6252 - $FF $FF $FF to $D5 $D5 $C5
    - $625A - $FF $FF $FF to $13 $11 $53.

     

    :)

    gravity snake

    in Atari 8-Bit Computers

    Posted · Edited by voy
    typo

    Yesterday I finally managed how to fix this game. ?

    You need the unLZ4ed version from Baktra (46030 bytes long). Change 6 bytes in the offsets listed below to $01.

    - $0611 (there is an address $D3FD)
    - $0628 ($D3F9)
    - $361C ($D3F5)
    - $3624 ($D3F1)
    - $676F ($D3ED)
    - $6798 ($D3E9).

    There is a certain regularity. As you can see, the address is decreased by 4 bytes with each subsequent occurrence. :)

    • Like 5

    Gravity Escape

    in Atari 8-Bit Computers

    Posted

    Here is quotation of Candle (still unanswered)...

     

    Quote

    U1MB makes use of addresses from D380 to D3FF, even if only few registers are defined in current specification, rest is RESERVED FOR FUTURE USE, and should be treated as such

    PORTB and PIA chip is not mapped into this address space at all

    xxl deliberatly makes use of that reserved address space excluding group of 3000+ atari computers (as i was told) to run his software - bravo

    just keep in mind this is also the case with Incognito equipped machines

    there is limited address space inside atari, and having to waste 256 bytes of space just to map hardware that has 4 locations is wastefull, but understandable from the point of original designers - full address decoder costs, per unit, and every penny counts

    U1MB reuses that wasted space - in current implementation only partially, but i rather have some space to grow, than squeeze it in the beggining and worry later how to add something new like DMA or whatever i would come with

     

    the game uses compressed executable? really? what for? to load slower?

     

    AVGCART

    in Atari 8-Bit Computers

    Posted

    Is it possible to add support for more than one FAT partition on the SD card? There are three partitions on my card: APT 2 GB, FAT16 2 GB and FAT32 ~3,2 GB. AVGCart sees only first FAT16 partition.

     

    Awesome work! :)

    • Like 1
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