The Amiga PiStorm Chip Ram Fix Hates ScanDoublers w 31khz modes

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  • เผยแพร่เมื่อ 25 ต.ค. 2024

ความคิดเห็น • 46

  • @saganandroid4175
    @saganandroid4175 2 วันที่ผ่านมา +3

    That CE Studios opening is so, so Cosmos Studios. ;-)

  • @DarrenJCrawford
    @DarrenJCrawford วันที่ผ่านมา +2

    Good show, you've solved another one Sherlock Edwards, just in time for tea. 😄

  • @rebeccaschade3987
    @rebeccaschade3987 วันที่ผ่านมา +3

    I'm currently running 640x512 interlaced, via Indivision AGA mk3, so I guess I'm good. I've not benchmarked recently, but I'll do tomorrow. Need to connect up my Amiga again, as I've been using the space to test out my Sun Ultra 5. But this seems like a really odd issue, but fortunately one that appears to have workarounds. Great working figuring this one out :)

  • @cullmaster7361
    @cullmaster7361 วันที่ผ่านมา +3

    Interesting vid Dr Chris. Watched “Q” on his channel (Hold and Modify) go about this also. I too have one of those new port holders from centurion tech 😉 Cheers 🍻

  • @HoldandModify
    @HoldandModify วันที่ผ่านมา +4

    And then I do the same test using my NTSC 1200 with MKIII in and out and I don’t see anywhere near the same numbers. (yes i was running at a different screenmode) Which is why my scores are lower. What’s important is looking at the PiStorm with and without MKIII. There’s not much difference.
    BUSTEST CHIP RAM RESULTS with MKIII INSTALLED
    High Resolution Laced, 64 color.
    PiStorm with MKIII:
    readw 1452.6ns 1.4*10^6 bytes
    readl 1496.2ns 1.2.7*10^6 bytes
    readm 1459.2ns 2.7*10^6 bytes
    writew 701.5 ns 2.9*10^6 bytes
    writel 698.5ns 5.7*10^6 bytes
    writem 698.6ns 5.7*10^6 bytes
    TF1260 with MKIII:
    readw 1180.6ns 1.7*10^6 bytes
    readl 1161.8ns 1.3.4*10^6 bytes
    readm 1154.6ns 3.5*10^6 bytes
    writew 1109.9ns 1.8*10^6 bytes
    writel 1083.9ns 3.7*10^6 bytes
    writem 1084.4ns 3.7*10^6 bytes
    GVP1230 with MKIII:
    readw 1033.5ns 1.9*10^6 bytes
    readl 1086.4ns 1.3.7*10^6 bytes
    readm 1079.2ns 3.7*10^6 bytes
    writew 1095.4ns 1.8*10^6 bytes
    writel 1094.9ns 3.7*10^6 bytes
    writem 1071.2ns 3.7*10^6 bytes
    NO MKIII INSTALLED
    PiStorm:
    readw 1452.1ns 1.4*10^6 bytes
    readl 1496.7ns 1.2.7*10^6 bytes
    readm 1453.8ns 2.8*10^6 bytes
    writew 690.5 ns 2.9*10^6 bytes
    writel 697.5ns 5.7*10^6 bytes
    writem 699.6ns 5.7*10^6 bytes
    TF1260:
    readw 1181.5ns 1.7*10^6 bytes
    readl 1168.8ns 1.3.4*10^6 bytes
    readm 1171.6ns 3.4*10^6 bytes
    writew 1085.7ns 1.8*10^6 bytes
    writel 1091.9ns 3.7*10^6 bytes
    writem 1089.4ns 3.7*10^6 bytes
    GVP1230:
    readw 1079.8ns 1.9*10^6 bytes
    readl 1105.9ns 1.3.8*10^6 bytes
    readm 1179.2ns 3.5*10^6 bytes
    writew 1101.1ns 1.8*10^6 bytes
    writel 1094.9ns 3.7*10^6 bytes
    writem 1071.5ns 3.8*10^6 bytes

  • @cwa107
    @cwa107 วันที่ผ่านมา +2

    I use the Indivision Mk2 and can confirm, no issue with an Amiga Technologies NTSC Rev 1-D-4 MB with an AmigaKit sourced PiStorm32-Lite with Pi4b No modifications to the original hardware at all.

  • @ChuckyGang
    @ChuckyGang 2 วันที่ผ่านมา +5

    the most important chipmem speed to demos and games (C2P etc) is WriteL.
    however 31KHz mode etc,. I think that steals chitton of chipmem access killling speedcheck..
    my guess: as chipset is designed?
    Let the scandouble double 15Khz to 31 and it will be fine. independent on scandoubler

    • @ChrisEdwardsRestoration
      @ChrisEdwardsRestoration  2 วันที่ผ่านมา +2

      any doubled modes rob it, tried it on the MK3 also, if its 15, shes good, 31=toilet. but they will get her fixed

    • @ChuckyGang
      @ChuckyGang วันที่ผ่านมา +4

      @@ChrisEdwardsRestoration think it will be hard to fix. as the chipset steals the cycles.. it is by chipset design
      this is independent on cpucard. will not blame pistorm anyway

    • @ChrisEdwardsRestoration
      @ChrisEdwardsRestoration  วันที่ผ่านมา +2

      @@ChuckyGang welp crap. at least i know what it is and how to get around it.

  • @keyboard_g
    @keyboard_g วันที่ผ่านมา +2

    Its like its picking up timings from the monitor and using that to set things at boot. Maybe an NTSC monitor is providing timings out of sync with the PAL crystal and its stalling out causing the lag waiting to sync up?
    On the old wikipedia I found something called Coordinated Video Timings.

    • @ChrisEdwardsRestoration
      @ChrisEdwardsRestoration  วันที่ผ่านมา +1

      i tried it w both crystals and in the end the ntsc clocks fixed w the resolution 15khz modes

  • @vertigoz
    @vertigoz วันที่ผ่านมา +2

    Can it be that it is the screen mode itself be far more demanding? I mean you could test double and check the values?

  • @bradhansen2065
    @bradhansen2065 22 ชั่วโมงที่ผ่านมา +1

    Chris, Are you saying if I just change the Crystal I can change my machine from NTSC to PAL?

  • @GenerationAI2024
    @GenerationAI2024 23 ชั่วโมงที่ผ่านมา +1

    Is that also the reason why the Chip Speed vs A600 is so bad on a PiStorm under sysinfo? Thanks for sharing.

    • @ChrisEdwardsRestoration
      @ChrisEdwardsRestoration  22 ชั่วโมงที่ผ่านมา +1

      yup

    • @GenerationAI2024
      @GenerationAI2024 21 ชั่วโมงที่ผ่านมา

      @@ChrisEdwardsRestoration Thank you for the answer, now im sold on that PiStorm. Do you know if they are able to fix this with a patch? Or is it fully hardware related? I'm on a PAL Amiga 1200 and only using RGB so that should not be a problem or am I missing anything? Again thanks for the answer, had reservations on the PiStorm but not anymore.

    • @GenerationAI2024
      @GenerationAI2024 14 ชั่วโมงที่ผ่านมา

      @@ChrisEdwardsRestoration Found a video where he is trying sysinfo 4.4 and 4.0. They show Chip Speed 2.28 and 7.20 respectively. He mentoins a new Beta version too.

  • @AndrewErwin73
    @AndrewErwin73 วันที่ผ่านมา +2

    18,278 years ago... someone told me the world is only 10,000 years old. Are you god?

  • @winstonsmith478
    @winstonsmith478 19 ชั่วโมงที่ผ่านมา

    Is there a version of PiStorm with no potential copyright violations so I can get a pre-configured Amiga system and desktop not including Amiga ROMs? Or am I misunderstanding the reasons for the huge download size which supposedly include a huge number of games?

  • @mathiasheyer3079
    @mathiasheyer3079 วันที่ผ่านมา +1

    What if plugging in the scanmagic does not change the access speed, but affects the timer (or calibration thereof), that is used by bustest, somehow?

  • @ffsireallydontcare
    @ffsireallydontcare วันที่ผ่านมา +2

    How current are the github repos for PiStorm, PiStorm32 and Emu68 compared to what's on Discord?

    • @LemaruX
      @LemaruX วันที่ผ่านมา +2

      They are always up to date with the latest version of the emulator and stuff if thats what you mean.

    • @ffsireallydontcare
      @ffsireallydontcare วันที่ผ่านมา +1

      @@LemaruX That's good and thanks for confirming. I've often heard people talking about getting releases via Discord, whereas the GitHub repos all seem to be unchanged. So long as GitHub isn't being ignored in favor of Discord.

    • @LemaruX
      @LemaruX วันที่ผ่านมา +3

      @@ffsireallydontcare The only releases people would get from discord are test builds for people to test to see if an issue is resolved. Any fixes or anything that are implemented are always pushed to github as this is where the projects are hosted.

  • @Really........
    @Really........ วันที่ผ่านมา +2

    The Dell SE2722H does PAL and 15KHz. Micro Center has them for $99.

    • @MrQuuze
      @MrQuuze วันที่ผ่านมา +1

      my DELL as well expect interlace even and odd scanlines wrong order. and interlace is important to me.

    • @Really........
      @Really........ 10 ชั่วโมงที่ผ่านมา

      @@MrQuuze Which model Dell do you have?

    • @MrQuuze
      @MrQuuze 42 นาทีที่ผ่านมา

      @@Really........ i not fully sure but memory says and quickseach found similar looking one. with code u2410

  • @RBRetroBunker
    @RBRetroBunker 19 นาทีที่ผ่านมา

    Hello love you channel. A question is recap on A3000 and 4000 as bad as A600 A1200? Do i need to fix A3000 4000 same bad caps?

  • @runeingebretsen8378
    @runeingebretsen8378 วันที่ผ่านมา +1

    chris you do know about pal 60hz right?

    • @ChrisEdwardsRestoration
      @ChrisEdwardsRestoration  วันที่ผ่านมา +3

      PAL 50 is based on the cycles of the power grid over there at 50 cycles , NTSC where jesus lives was always 60. so no dont know about pal 60.

    • @ffsireallydontcare
      @ffsireallydontcare วันที่ผ่านมา +1

      Wasn't Pal 60 a hack to allow playback of NTSC VHS and Laserdiscs in Pal countries on TVs with relaxed vertical timings?

    • @runeingebretsen8378
      @runeingebretsen8378 วันที่ผ่านมา

      @@ffsireallydontcare i am using it right now on my lcd tv 1920X1080 60p.

    • @runeingebretsen8378
      @runeingebretsen8378 วันที่ผ่านมา +1

      @@ffsireallydontcare back when vhs and dvd was a thing i played ntsc on my pal tv just fine with colors,it seems pal can go up but ntsc can't go down.

  • @ffsireallydontcare
    @ffsireallydontcare วันที่ผ่านมา +2

    ffs I wish PiStorm was somewhere other than Discord. Discord is utterly utterly broken and I CANNOT join, it's also run by disk heads..

    • @LemaruX
      @LemaruX วันที่ผ่านมา +2

      Discord works fine for everyone else. Where else should it be? Certainly not Facebook, though we have the PiStorm Facebook group which I share any new info and developments, but you wont find any development chat or the developers there. Guess we are just "disk heads" though

    • @ffsireallydontcare
      @ffsireallydontcare วันที่ผ่านมา +1

      @@LemaruX Forums used to work a treat before big tech stole everyone's brains (and personal information).
      It's Discord that's run by disk heads. Their signup process is broken, I mean how else do you get banned before the landing page finishes loading immediately after completing the signup process? Congratulations for being fortunate in getting Discord's blessing to be part of the world.
      Any open source project that puts its forums on Discord is immediately alienating and excluding a significant portion of their potential community base. I *cannot* interact with the Emu68 or PiStorm communities because of their choice, believe me I've tried.

    • @LemaruX
      @LemaruX วันที่ผ่านมา +1

      @@ffsireallydontcare i totally get that discord isn't everyones cup of tea, but it works well for development chat and the like. Forums today are almost as bad as facebook for trolls and general toxicity about anything that people dont like or agree with. Luckily all the discord folks are on the server for a reason so it avoids all that. Its a much friendlier and nicer place to be

    • @ffsireallydontcare
      @ffsireallydontcare วันที่ผ่านมา +1

      @@LemaruX If you can get on it in the first place. If Discord goes under so does all that history as the Internet Archive can't record it, not to mention the exclusion of all the people Discord incorrectly deems unworthy. It's not that its not my cup of tea, the door key to the tea shop has snapped off in the lock and and I'm stuck outside. It makes me wonder why I bother being interested at all.

    • @mja65
      @mja65 วันที่ผ่านมา +1

      ​@@ffsireallydontcare A "significant portion"? Just because YOU choose not to access Discord doesn't make it the case a significant portion of people cannot.....