Pegasos 2 HDD/SSD SATA options
  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Andreas_Wolf wrote:
    > Pegasos 2 today is nearly 15years old.

    Release was in December 2003, so it's 15½ years :-)

    > I overclocked Peg2 to 1.33MHz

    ;-)


    ;-) maybe I buyed him in 2004? I have to look to archive.

    sorry, of course 1.33 GHz ;-)
    1.33GHz not bad, it outperforms SAM460 in Tower57 "benchmark" and have 3003 MIPS/core compares to 3960 on X1000 and 4750 on G5Quad

    Last things what I can do for speedup is SATA (this topic), and overclock Radeon9800pro. I cannot reach the 9800XT frequencies, but yesteday I tested succesfully overclocking core 378->394.88, and memory 337.5->351 frequencies. Now I need change BIOS and try it on Pegasos ;-)
    Maybe later, If I find some cheap HD4xxx I will also test it on PCI slot.
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »30.05.19 - 06:31
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Jim wrote:
    In some ways the X1000 was superior to the X5000. For one, it has more PCIe lanes. And I believe the PA6T supports AltiVec.


    I completely agree.
    and MorphOS was opimised for AltiVec from beginning.
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »30.05.19 - 06:34
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  • Acolyte of the Butterfly
    Acolyte of the Butterfly
    Jeckel
    Posts: 133 from 2007/3/11
    Quote:

    sailor wrote:
    > I overclocked Peg2 to 1.33GHz



    How do you overclock a Peg2?
  • »30.05.19 - 08:32
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Jeckel wrote:
    How do you overclock a Peg2?


    on G4 CPU card you have to remove SMD resistor and sold here dip-switch. And then test maximal frequency without errors. Good cooler is a must.

    I made it thanks to Prober and tlosmx. Deatiled manual is here:
    Probers.cz

    and here are links to my articles:
    Amiga Klub Forever + Czech PowerPC User Group
    Hyperion - Pegasos II

    in case of interest I can try translate some parts to English. (Pidgin English, of course)

    I did it according Probers manual, but later I changed cooler to ARCTIC Alpine M1-Passive Socket AM1 - because Thermalright HR-05 SLI blocked way to IDE connectors.
    I made modifications on Arctic cooler (to fit in place) and supply with fan.
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »30.05.19 - 08:57
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  • Jim
  • Yokemate of Keyboards
    Yokemate of Keyboards
    Jim
    Posts: 4977 from 2009/1/28
    From: Delaware, USA
    Quote:

    sailor wrote:
    Quote:

    Jeckel wrote:
    How do you overclock a Peg2?


    on G4 CPU card you have to remove SMD resistor and sold here dip-switch. And then test maximal frequency without errors. Good cooler is a must.

    I made it thanks to Prober and tlosmx. Deatiled manual is here:
    Probers.cz

    and here are links to my articles:
    Amiga Klub Forever + Czech PowerPC User Group
    Hyperion - Pegasos II

    in case of interest I can try translate some parts to English. (Pidgin English, of course)

    I did it according Probers manual, but later I changed cooler to ARCTIC Alpine M1-Passive Socket AM1 - because Thermalright HR-05 SLI blocked way to IDE connectors.
    I made modifications on Arctic cooler (to fit in place) and supply with fan.


    Interesting. Do you think you could remove the MPC7447 CPU from a Peg2 G4 board and refit it with an MPC7447A?

    That would guarantee 1.4 GHz operation (or higher).
    I believe they are pin and voltage compatible.
    "Never attribute to malice what can more readily explained by incompetence"
  • »30.05.19 - 15:07
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  • Priest of the Order of the Butterfly
    Priest of the Order of the Butterfly
    KennyR
    Posts: 882 from 2003/3/4
    From: #AmigaZeux, Gu...
    The Peg2's big bottleneck is the MV64361 northbridge. Overclocking the CPU would result in rather poor gains for the effort, I would think.
  • »30.05.19 - 15:53
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Jim wrote:
    Interesting. Do you think you could remove the MPC7447 CPU from a Peg2 G4 board and refit it with an MPC7447A?

    That would guarantee 1.4 GHz operation (or higher).
    I believe they are pin and voltage compatible.




    I don't think so.
    With higher frequencies ( 1.4 GHz and above ) I had memory read errors. From my opinion is northbridge MV64361 responsible for this, not CPU.
    And also remove SMD and sold dip-switch is easy task, if I replace CPUs - there can be much bigger chance to disrupt something.

    Even if I will succeed replace CPUs and northbridge have no errors with MPC7447A - the max frequency is 1.464 GHz - about 10% more than I have today. It is only small surplus with great risk.
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »31.05.19 - 08:15
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    KennyR wrote:
    The Peg2's big bottleneck is the MV64361 northbridge. Overclocking the CPU would result in rather poor gains for the effort, I would think.


    I overclocked from 1.0 to 1.33GHz
    and speed increase is markant:

    memory: +3.5% (stream) +13% (RAMSpeed)

    HDD, onboard IDE +24%
    HDD, SiI SATA +69%
    (Promise SATA2 is even much better cca +200% - but it is extrapolation from different comparisons)

    Linux Hardinfo +27%

    SDLbench +80% (including 9200->9800PRO replacement)

    the most important is, that my subjective feeling of speed increase is great, and I can again play youtube videos and most of movies.

    [ Edited by sailor 31.05.2019 - 10:53 ]
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »31.05.19 - 08:30
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  • Priest of the Order of the Butterfly
    Priest of the Order of the Butterfly
    ernsteiswuerfel
    Posts: 560 from 2015/6/18
    From: Funeralopolis
    Quote:

    sailor schrieb:
    I overclocked from 1.0 to 1.33GHz
    and speed increase is markant:

    memory: +3.5% (stream) +13% (RAMSpeed)


    Kudos to your overclocking efforts! Did you perhaps measure the power increase under load? I also wonder if or how much overclocking of hardware of that period reduces the lifespan of the hardware?

    Does not matter much if you still run an e.g. Athlon 64 as you can easily replace it with some other cheap bog standard PC - but it does matter if your want to keep your 'legacy' G4 7455 hardware around. ;-)

    [ Editiert durch ernsteiswuerfel 31.05.2019 - 15:19 ]
    Talos II. [Gentoo Linux] | PMac G5 11,2. PMac G4 3,6. PBook G4 5,8. [MorphOS 3.18 / Gentoo Linux] | A600GS
  • »31.05.19 - 11:33
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    ernsteiswuerfel wrote:
    Quote:

    sailor schrieb:
    I overclocked from 1.0 to 1.33GHz
    and speed increase is markant:

    memory: +3.5% (stream) +13% (RAMSpeed)


    Kudos to your overclocking efforts! Did you perhaps measure the power increase under load? I also wonder if or how much overclocking of hardware of that period reduces the lifespan of the hardware?

    Does not matter much if you still run an e.g. Athlon 64 as you can easily replace it with some other cheap bog standard PC - but it does matter if your want to keep your 'legacy' G4 7455 hardware around. ;-)


    Thanks.
    No, I don't measure the power. Maybe I have to build some testbed next time.
    Completely agree in this isuue.
    Overclocking may lead to reduced lifespan, and it is very unlikely with Pegasos.

    Only things what I did against this is new power supply and proper cooling:
    I used oversized passive cooler with fan, passive cooler on RAM, passive coolers on Northbridge and Southbridge.
    Rear side of CPUcard now have much lower temperature than with original frequency and standard cooler. ( measured by finger - another thing for which is testbed good for)
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »31.05.19 - 11:55
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  • Yokemate of Keyboards
    Yokemate of Keyboards
    Andreas_Wolf
    Posts: 12245 from 2003/5/22
    From: Germany
    > With higher frequencies ( 1.4 GHz and above ) I had memory read errors.
    > From my opinion is northbridge MV64361 responsible for this, not CPU.

    The northbridge being responsible for this doesn't seem plausible to me. The northbridge does not care for the CPU clock rate at all. It runs at the same clock rate no matter the CPU clock rate.

    > the max frequency is 1.464 GHz

    Is it a given that 11x is the highest possible multiplier? After all, the 5 binary digits of the PLL config can theoretically represent 32 different numbers, and with 0.5 steps this could amount to a 2.07 GHz range.
  • »31.05.19 - 12:04
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  • Yokemate of Keyboards
    Yokemate of Keyboards
    Andreas_Wolf
    Posts: 12245 from 2003/5/22
    From: Germany
    > I also wonder if [...] overclocking of hardware of that period
    > reduces the lifespan of the hardware?

    It does, always.

    > it does matter if your want to keep your 'legacy' G4 7455 hardware around. ;-)

    Agreed, apart from the fact that the Pegasos II uses newer generation 7447 ;-)
  • »31.05.19 - 12:16
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  • Yokemate of Keyboards
    Yokemate of Keyboards
    Andreas_Wolf
    Posts: 12245 from 2003/5/22
    From: Germany
    > Overclocking may lead to reduced lifespan, and it is very unlikely with Pegasos.

    Why is it "very unlikely with Pegasos"? Or do you mean your Pegasos in particular, due to your extra cooling measures?
  • »31.05.19 - 12:23
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Andreas_Wolf wrote:
    > Overclocking may lead to reduced lifespan, and it is very unlikely with Pegasos.

    Why is it "very unlikely with Pegasos"? Or do you mean your Pegasos in particular, due to your extra cooling measures?


    no, I simply mean this my Pegasos, because it is my best MorpOS machine. If I burn it, I have to wait for Talos port ;-)
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »31.05.19 - 14:34
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Andreas_Wolf wrote:
    > With higher frequencies ( 1.4 GHz and above ) I had memory read errors.
    > From my opinion is northbridge MV64361 responsible for this, not CPU.

    The northbridge being responsible for this doesn't seem plausible to me. The northbridge does not care for the CPU clock rate at all. It runs at the same clock rate no matter the CPU clock rate.

    > the max frequency is 1.464 GHz

    Is it a given that 11x is the highest possible multiplier? After all, the 5 binary digits of the PLL config can theoretically represent 32 different numbers, and with 0.5 steps this could amount to a 2.07 GHz range.


    maybe, I don't know and have no way how to test it. Higher frequencies then 1.333 makes memory error.
    Of course, It can be done on processor side. But also some synchro issues on northbridge.

    yes, in theory 5 pin = 32 possibilites.
    But if I see the table obr-3.jpg I have no idea how exact set higher frequencies.
    And for sure, I will try such things only with spare Pegasos or at least spare CPU card.
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »31.05.19 - 14:54
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  • Yokemate of Keyboards
    Yokemate of Keyboards
    Andreas_Wolf
    Posts: 12245 from 2003/5/22
    From: Germany
    >>> Overclocking may lead to reduced lifespan, and it is very unlikely with Pegasos.

    >> Why is it "very unlikely with Pegasos"?

    > I simply mean this my Pegasos, because it is my best MorpOS machine.

    Okay, so not "unlikely" (which means "improbable") then, but "unwanted" :-)

    > If I burn it, I have to wait for Talos port ;-)

    I'd prefer Blackbird :-)
  • »31.05.19 - 16:05
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Andreas_Wolf wrote:
    >>> Overclocking may lead to reduced lifespan, and it is very unlikely with Pegasos.

    >> Why is it "very unlikely with Pegasos"?

    > I simply mean this my Pegasos, because it is my best MorpOS machine.

    Okay, so not "unlikely" (which means "improbable") then, but "unwanted" :-)

    > If I burn it, I have to wait for Talos port ;-)

    I'd prefer Blackbird :-)


    yes - unwanted! I said that my English is Pidgin ;-)
    I am looking forward to decision: Blackbird with MOS or Talos with MOS ;-)
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »31.05.19 - 18:57
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    sailor wrote:
    MOS 3.11:
    PCI card SII 3x1x - SATA I sata.device UDMA5=100MB/s S.M.A.R.T no

    AOS 4.1FE:
    PCI card SII 3x1x - SATA I sii3114ide.device UDMA6=133MB/s S.M.A.R.T yes

    I return to this topics:
    Please, do somebody use sata.device on Morphos machine other than Pegasos2 ?
    And if, please can you check the morphos-debug.log, if your drives recognized like UDMA5=100MB/s or UDMA6=133MB/s.
    Many thanks.

    [ Edited by sailor 03.06.2019 - 10:10 ]
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »03.06.19 - 08:09
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  • Jim
  • Yokemate of Keyboards
    Yokemate of Keyboards
    Jim
    Posts: 4977 from 2009/1/28
    From: Delaware, USA
    Quote:

    sailor wrote:
    Quote:

    Andreas_Wolf wrote:
    > Pegasos 2 today is nearly 15years old.

    Release was in December 2003, so it's 15½ years :-)

    > I overclocked Peg2 to 1.33MHz

    ;-)


    ;-) maybe I buyed him in 2004? I have to look to archive.

    sorry, of course 1.33 GHz ;-)
    1.33GHz not bad, it outperforms SAM460 in Tower57 "benchmark" and have 3003 MIPS/core compares to 3960 on X1000 and 4750 on G5Quad

    Last things what I can do for speedup is SATA (this topic), and overclock Radeon9800pro. I cannot reach the 9800XT frequencies, but yesteday I tested succesfully overclocking core 378->394.88, and memory 337.5->351 frequencies. Now I need change BIOS and try it on Pegasos ;-)
    Maybe later, If I find some cheap HD4xxx I will also test it on PCI slot.


    There are some cards being sold as 9800Pro cards that has universally keyed AGP card edge connectors and have R360 gpu's (like the 9800XT), but again I've only kept one flashed 9800 with a 128K rom that actually works correctly in my G4.
    And many R300/R360 cards use lousy memory that is clocked below ATI's own cards, or won't handle being clicked to 9800XT speeds which limits what you can do even if you have an R360 gpu.
    Also, speed changes really require editing the rom as I don't know of a MorphOS utility that allows the adjustment of ATI gpu and vram speeds on the fly.

    What would be nice is a vmod for the Peg2 that would lower the voltage supplied to the AGP slot.
    BUT, that would probably entail replacing the AGP slot connector with a 4x/8x part as well (the cards would have to physically fit.

    There is a point where all this gets to be too much effort.

    If you could find a PCI HD 5450 (or was it 5470) that would be an option. Good luck with that though. I have never seen one actually offered for sale. Specs on cards that were supposedly produced, but no cards.

    If we had good docs for the Peg2, not just schematics, but full board layouts, we could build new boards with higher clock speeds, adjustability, and a lower voltage, more modern AGP slot, etc.
    And I don't know where you'd get the critical Marvell part.

    A T10XX or T2080 based board would make more sense.

    Or, as you and Andreas have concluded a Blackbird port (or the release of a late 2005 G5 port), would be more practical.

    Looks like you've about maxed it out.

    Why not enjoy what you have, and if you really want a G4, buy an FW800 (or just go for the G5)?
    Who said you can't have more than one MorphOS system?
    "Never attribute to malice what can more readily explained by incompetence"
  • »04.06.19 - 02:29
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Jim wrote:
    There are some cards being sold as 9800Pro cards that has universally keyed AGP card edge connectors and have R360 gpu's (like the 9800XT), but again I've only kept one flashed 9800 with a 128K rom that actually works correctly in my G4.
    And many R300/R360 cards use lousy memory that is clocked below ATI's own cards, or won't handle being clicked to 9800XT speeds which limits what you can do even if you have an R360 gpu.
    Also, speed changes really require editing the rom as I don't know of a MorphOS utility that allows the adjustment of ATI gpu and vram speeds on the fly.

    What would be nice is a vmod for the Peg2 that would lower the voltage supplied to the AGP slot.
    BUT, that would probably entail replacing the AGP slot connector with a 4x/8x part as well (the cards would have to physically fit.

    There is a point where all this gets to be too much effort.

    If you could find a PCI HD 5450 (or was it 5470) that would be an option. Good luck with that though. I have never seen one actually offered for sale. Specs on cards that were supposedly produced, but no cards.

    If we had good docs for the Peg2, not just schematics, but full board layouts, we could build new boards with higher clock speeds, adjustability, and a lower voltage, more modern AGP slot, etc.
    And I don't know where you'd get the critical Marvell part.

    A T10XX or T2080 based board would make more sense.

    Or, as you and Andreas have concluded a Blackbird port (or the release of a late 2005 G5 port), would be more practical.

    Looks like you've about maxed it out.

    Why not enjoy what you have, and if you really want a G4, buy an FW800 (or just go for the G5)?
    Who said you can't have more than one MorphOS system?


    9800Pro I found only in two main alternatives: universal-keyed R350 and R360 1.5V-keyed. R360 can be reflashed and overclocked to 9800XT, and R350 cannot.
    I edited flash rom of R350 to 351MHz memory and 392MHz core. window01.png and equip card with modified cooler Thermalright V-1 Ultra.

    PCI+HDxxxx card I will test in future, only if I have some suitable HDxx card nearby. I wonder if HD card will be faster - because AGP have double PCI speed in Pegasos 2.
    And regarding Marwell - I am only suspicious, that it is critical part. The main reason is, that I cannot find pair of RAMs which have no errors even on non-modified 1.0GHz machine.

    I think that vmod will be fine, but I agree, it is too much effort, and is not so important.
    I probably also can try some AGP3.3V -> PCI3.3V,66MHz,32bit reduction - it can be useful for SATA2 card. Promise TX4 is designed for 3.3V,32b,66MHz. If it can be suitable for graphic cards, I don't know. But all this is theory only.

    From practical point of view I agree - Blackbird/Talos, G5-2005, T10XX or T2080 have more sense. ( I had in my computer room G5 quad and iMac G5 waiting for morphos several years ;-))

    Yes, I have already maxed out my Pegasos HW speed. The reason why I posted this thread is, that MorphOS sata.device have lack of speed (and features) even for SATAI drives.

    And definitely - I can have have more then one MorphOs system. With pleasure.

    [ Edited by sailor 04.06.2019 - 09:56 ]
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »04.06.19 - 07:49
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  • Yokemate of Keyboards
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    Andreas_Wolf
    Posts: 12245 from 2003/5/22
    From: Germany
    > a vmod for the Peg2 that would lower the voltage supplied to the AGP slot
    > [...] would probably entail replacing the AGP slot connector with a 4x/8x part

    Yes, absolutely.

    > If you could find a PCI HD 5450 (or was it 5470)

    It's 5450.

    > that would be an option.

    Although currently no overlay with MorphOS.

    > I have never seen one actually offered for sale.

    https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=12232&forum=9&start=37
    (Additionally, eBay Germany has a used one (CGA-5452PLI) for 130 EUR (146 USD).)

    > if you really want a G4

    He does have a Pegasos II G4. It's what this thread is about ;-)
  • »04.06.19 - 13:38
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  • Yokemate of Keyboards
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    Andreas_Wolf
    Posts: 12245 from 2003/5/22
    From: Germany
    > I cannot find pair of RAMs which have no errors

    2× 1 GiB can only work error-free on revision 2B5 boards.
  • »04.06.19 - 20:13
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  • Order of the Butterfly
    Order of the Butterfly
    sailor
    Posts: 402 from 2019/5/9
    From: Central Bohemi...
    Quote:

    Andreas_Wolf wrote:
    > I cannot find pair of RAMs which have no errors

    2× 1 GiB can only work error-free on revision 2B5 boards.

    yes, 2B5 is best for 2GB.

    But theoretically from rev.2B2 is Pegasos2 2GB capable. In past I spoke about this with Thomas Knäbel from bplan and he confirmed that 2B2 motherboard is 2G capable, but there was a very limited amount modules which works.
    Somewhere (forgot where) I also read, that from rev. 2B3 is much better chance to 2GB work.

    And as I tried many pairs of RAM and none of them works, it is nearly the same as 2B2 is not 2GB capable ;-)
    Btw. I found only one 2x RAM combination which worked for me - 512+256 MB.
    AmigaOS3: Amiga 1200
    AmigaOS4: Micro A1-C, AmigaOne XE, Pegasos II, Sam440ep, Sam440ep-flex, Sam460LE, AmigaOneX1000
    MorphOS: Efika 5200b, Pegasos I, Sam460LE, Pegasos II, Powerbook G4, Mac Mini, iMac G5, Powermac G5 Quad
  • »05.06.19 - 06:11
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  • Yokemate of Keyboards
    Yokemate of Keyboards
    Andreas_Wolf
    Posts: 12245 from 2003/5/22
    From: Germany
    >> 2× 1 GiB can only work error-free on revision 2B5 boards.

    > yes, 2B5 is best for 2GB. But theoretically from rev.2B2 is Pegasos2
    > 2GB capable. In past I spoke about this with Thomas Knäbel from bplan
    > and he confirmed that 2B2 motherboard is 2G capable, but there was a
    > very limited amount modules which works. Somewhere (forgot where)
    > I also read, that from rev. 2B3 is much better chance to 2GB work.

    I've yet to read about any pre-2B5 board that works reliably (i.e. also tested successfully with Linux, because that works harder on the memory than MorphOS) with 2× 1 GiB, and even with 2B5 it's hit or miss. Theoretically, all boards from 2B1 on should work with 2× 1 GiB, because that's what the official mainboard specs claim ;-)
  • »05.06.19 - 08:15
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