Author Topic: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)  (Read 60387 times)

Offline max1zzz

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #75 on: September 28, 2016, 04:47:41 PM »
Everyone gets so caught up on the size of the chip, The size of the chips is really not important here

The problem is that the firmware preforms a flash id check, if the firmware detects the flash chip is not a am29lv040, mx29lv040 or pm39lv040 the firmware will refuse to load. You can cut down the firmware to fit on the 1mbit flash chips the cards ship with but they still won't work as they will still fail the flash id check.

To get the firmware to work on these cards unmodified you would need to disable this check and cut the firmware down, the latter process being (in theory) quite easy (probably just cutting out the compressed OSX kexts in the firmware that aren't needed for our uses would do). The former is the difficult one, and thus far I haven't seen any one who has accomplished it.

At this point the only option is to swap the flash chip with one of the 3 mentioned above, they are a standard standard size but for some reason are pretty hard to come by (I guess that's why seritek chose them....)

Offline geforceg4

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #76 on: September 28, 2016, 08:14:23 PM »
i remember all of those details.. so yea..
its public knowledge now.., the goal is to 1) backward engineer + remove both the brand + size checks from the firmware 2) reduce the size anyway possible, one way possibly being by removing the osx related code.. (it was also thought that there might be further code-logic where the script inside the firmware checks the size of the firmware itself to make sure it hasnt been tampered with etc)


once thats accomplished, it would make it possible for anyone to get a SIL3112 card and be able to use any mac or pc to re-flash a card without doing any physical hardware chip swap - de-soldering + re-soldering

Offline max1zzz

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #77 on: September 29, 2016, 11:56:52 AM »
Interesting, Just been re-reading the thread over at 68k and just noticed something interesting about what dougg3 said about the flash id check

Quote
The firmware extracts a couple of kexts into OS X, and one of the kexts checks for supported flash chips during the OS X boot process and fails to load if the board doesn't have a supported flash chip. (In fact, on a newer revision of the firmware that they don't have available on the website for download, it causes a kernel panic...)

So the driver checks the flash chip and not the firmware, dougg3 only ever looked at the OSX kext's - this leaves a real good chance that the OS9 driver might not.
If this is the case we may be able to just cut down the firmware after all.... Looks like I have some testing to do at the weekend :)

Offline geforceg4

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #78 on: September 29, 2016, 03:23:15 PM »
Everyone gets so caught up on the size of the chip, The size of the chips is really not important here

The problem is that the firmware preforms a flash id check, if the firmware detects the flash chip is not a am29lv040, mx29lv040 or pm39lv040 the firmware will refuse to load.


well the 040 indicates the size of the chip.. (4M-BIT [512K x 8] but you probably know that already) .. so the size of the chip is part of the check for the specific size + make that was part of the check that was thought to exist in the firmware.

Offline madalynmcworm

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #79 on: October 24, 2016, 08:20:38 AM »
Is this still something we are working on?

I'm having a heck of a time finding any SATA cards that are native. I see these si(i|L)3112 cards for $8 on ebay. I don't see any confirmation that the $8 cards work. One post was the first went well, the next two failed.

Do we know what the firmware instruction set is for REing it? Or any more real info?


Offline geforceg4

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #80 on: October 24, 2016, 08:15:08 PM »
Is this still something we are working on?

I'm having a heck of a time finding any SATA cards that are native. I see these si(i|L)3112 cards for $8 on ebay. I don't see any confirmation that the $8 cards work. One post was the first went well, the next two failed.

Do we know what the firmware instruction set is for REing it? Or any more real info?


the SIL cards themselves dont work untill they are modified by a professional whos familiar with the process in making them mac bootable..

Offline madalynmcworm

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #81 on: October 25, 2016, 08:57:46 AM »
Is this still something we are working on?

I'm having a heck of a time finding any SATA cards that are native. I see these si(i|L)3112 cards for $8 on ebay. I don't see any confirmation that the $8 cards work. One post was the first went well, the next two failed.

Do we know what the firmware instruction set is for REing it? Or any more real info?


the SIL cards themselves dont work untill they are modified by a professional whos familiar with the process in making them mac bootable..

Is there a defined process for modifying those cards that is public?

Offline MacTron

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #82 on: October 25, 2016, 10:22:29 AM »
Is there a defined process for modifying those cards that is public?

Yes, it's public but complex: You have to change the EPROM of the card and flash it with the Mac Firmware.
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Offline Knezzen

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #83 on: November 25, 2016, 10:38:43 AM »
Just wanted to share the QuickBench results from my KingSpec 120gb SATA SSD connected to the Sil3114 based card I bought from max1zzz.

QuickBench™ 1.5 Test Results File
©2000 Intech Software Corp.
Test file created on fredag 25 november 2016 at 19.37.39
Test Volume name: Copland

Xfer Size     Sequential Read   Sequential Write    Random Read      Random Write

1 KByte         3.772 MB/sec    565.163 KB/sec      2.134 MB/sec    577.968 KB/sec
2 KBytes        7.202 MB/sec      1.110 MB/sec      7.250 MB/sec      1.127 MB/sec
4 KBytes       12.749 MB/sec      2.228 MB/sec     12.346 MB/sec      2.186 MB/sec
8 KBytes       23.196 MB/sec      4.101 MB/sec     19.734 MB/sec      4.214 MB/sec
16 KBytes      20.864 MB/sec      8.297 MB/sec     28.591 MB/sec      8.505 MB/sec
32 KBytes      62.751 MB/sec     16.107 MB/sec     36.350 MB/sec     15.476 MB/sec
64 KBytes      78.340 MB/sec     28.115 MB/sec     47.863 MB/sec     27.315 MB/sec
128 KBytes     89.580 MB/sec     43.093 MB/sec     39.700 MB/sec     42.769 MB/sec
256 KBytes     96.779 MB/sec     59.297 MB/sec     59.275 MB/sec     61.216 MB/sec
512 KBytes    100.766 MB/sec     77.188 MB/sec     76.233 MB/sec     76.578 MB/sec
1 MByte       102.913 MB/sec     89.473 MB/sec     95.815 MB/sec     78.484 MB/sec

Offline Protools5LEGuy

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #84 on: November 25, 2016, 02:37:20 PM »
Just wanted to share the QuickBench results from my KingSpec 120gb SATA SSD connected to the Sil3114 based card I bought from max1zzz.

I would swear max1zzz does magic on 3112
Looking for MacOS 9.2.4

Offline Knezzen

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #85 on: December 01, 2016, 10:23:15 AM »
So the SeriTek/1v4 arrived today from Italy. I took out the Sil3112 based card I bought from Max and put the SeriTek in it's place. The first thing I did was take some new benchmarks with QuickBench.

So this is the exact same SSD with the same 9.2.2 installation I used with the Sil3112 card.

QuickBench™ 1.5 Test Results File
©2000 Intech Software Corp.
Test file created on torsdag 1 december 2016 at 18.19.38
Test Volume name: Copland

Xfer Size     Sequential Read   Sequential Write    Random Read      Random Write


1 KByte         4.498 MB/sec    688.468 KB/sec      3.342 MB/sec    723.170 KB/sec
2 KBytes        8.677 MB/sec      1.377 MB/sec      9.825 MB/sec      1.411 MB/sec
4 KBytes       15.241 MB/sec      2.712 MB/sec     16.758 MB/sec      2.782 MB/sec
8 KBytes       27.832 MB/sec      5.247 MB/sec     28.123 MB/sec      5.420 MB/sec
16 KBytes      25.469 MB/sec      2.950 MB/sec     40.406 MB/sec     10.234 MB/sec
32 KBytes      76.238 MB/sec     19.184 MB/sec     51.610 MB/sec     18.941 MB/sec
64 KBytes      94.812 MB/sec     33.307 MB/sec     67.067 MB/sec     33.499 MB/sec
128 KBytes    112.289 MB/sec     51.318 MB/sec     82.476 MB/sec     52.636 MB/sec
256 KBytes    120.314 MB/sec     72.897 MB/sec    109.185 MB/sec     73.063 MB/sec
512 KBytes    125.294 MB/sec     90.588 MB/sec    118.810 MB/sec     91.037 MB/sec
1 MByte       127.379 MB/sec    105.403 MB/sec    122.983 MB/sec    104.777 MB/sec

You can really see that the 64bit SeriTek gives an overall speed improved.
I'm very satisfied with the results  -afro-

Offline madalynmcworm

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #86 on: January 31, 2017, 12:04:18 PM »
Hmm. Been a bit busy, maybe I missed something. Has anything new been learned or has a wiki been made with a flashing process and proper chips, etc for making this work?

I'm fine with soldering / flashing it myself; It just appears to be a bit scattered as far as info goes for me. I'd like a confirmed process that seems to be the agreed upon way to do this and not "Oh this guy said this and then did this and then vanished. Some other guy used this and it worked maybe...".



Offline stephenvalente

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #87 on: February 06, 2017, 07:10:37 AM »
I'm watching the item below. Anyone use this?

https://www.ebay.co.uk/itm/142222150212

Offline MacTron

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #88 on: February 06, 2017, 08:13:51 AM »
I'm watching the item below. Anyone use this?

https://www.ebay.co.uk/itm/142222150212

It does not support Mac OS 9.
Please don't PM about things that are not private.

Offline stephenvalente

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #89 on: February 06, 2017, 01:50:28 PM »
I'm watching the item below. Anyone use this?

https://www.ebay.co.uk/itm/142222150212

It does not support Mac OS 9.

Apologies; was too focussed on looking at it working with the Power Mac G4 and not the OS!

Offline stephenvalente

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #90 on: February 20, 2017, 01:43:21 AM »
Managed to get a 2-port Sonnet SATA card here in the U.K. Will install in one of my mirror door G4's when time allows. Amazed to find one!

Offline tiousable

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #91 on: May 28, 2017, 04:20:03 AM »
Well, I finally got around to replacing the flash on the card I mentioned earlier. Have the Seritek 1S2 (v5.1.3, I seem to recall there being others, which I have yet to try) firmware on it right now. The card shows up, as well as the attached SSD, and I can start initializing the disk, but then it just... sits there, being busy... updating the screen every second or two so it's not totally stuck. Is that a known failure mode? Do I have to install to an IDE drive and clone that to a SATA one, maybe?

Offline IIO

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #92 on: July 06, 2017, 07:18:56 AM »
my sonnet recently started to do weird things in both OS9 and OSX. there is also a chance that the problems are caused by a dying quicksilver PSU, but otherwise i tracked it down to the sonnet card by a long list of tests.
"It is true that the "pre-emptive multitasking" advantage present in OS X can be illustrated by downloading CD-ROM ISOs and rendering chaos theory formulas while simultaneously instant messaging and posting on FaceBook what you ate... but in reality, what did you create?"
- DieHard, random forum troll at macos9lives.com

Offline wnlewis

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #93 on: December 19, 2017, 03:25:17 PM »
I recently bought a Firmtek/Seritek 1V4 and several Firmtek/Seritek 1SC1 adapters. I put the jumper on a Seagate Barracuda 750 Gb drive to set it for master, put the 1SC1 adapter on it, and plugged the cable into the 1V4 card. Then I selected OS 9.2.2 as the boot drive (on the Seagate) and restarted the G4 (AGP with a 1 GHZ upgrade). The G4 booted into 9.2.2 just like it was supposed to. So that was step one in a project I am working on. Neal Lewis

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #94 on: December 24, 2017, 08:16:38 AM »
the combination of a pci sata card and a healthy modern hard drive = disk performance that i would have loved to have had
back in 1999, 2000, 2001 time period, for g3s + lower end g4's i think its a must have upgrade for any serious hobbyist or vintage mac enthusiast!

Offline MacTron

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #95 on: December 26, 2017, 07:25:38 AM »
All the SATA PCI cards for Mac os 9 are 32 bits.

I was wrong here... the Seritek 1eVE2+2 and the Seritek 1V4 are both 64 bits.

It would be interesting to see some test results with those SATA cards against this adaptors.



http://macos9lives.com/smforum/index.php/topic,2023.msg27432.html#msg27432
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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #96 on: December 26, 2017, 12:22:21 PM »
it would be an amazing accomplishment to be able to find an easy modification to allow the generic SIL3112 cards to be able to be mac os9 bootable..

looking at the graph above just posted by mactron, yes the 64bit is far + away the leader .+ "BEST" but for me, the performance of the sil3112 is not far behind but the biggest difference is the PRICE! these sil3112 cards are only 10$ a pop or can be found in large quanitities + availability; wheras the 64bit ones are hard to find and about 3-4 times as costly,
small price to pay to have the BEST for those who are obsessed with achieving the best performance..

but for me, im more than happy with the performance jump simply using a sil3112 pci card over the built in disk which can be ATA33 or ATA66 or ATA100 depending on which PCI MAC you are using..
because of the PRICE! is so cheap..  the main problem is the stupid tricky firmware.. performing all these unneccessary checks..with the sole purpose of ensuring their own profit margin,

whats funny to me is that the creators of the seritek firmware + other bootable sata firmwares, this is not something that they "OWN COPYRIGHT OF" because noone can "OWN" the ability to boot the mac.... except for maybe apple.

these developers who developed this firmware must have done so with the help of apples developer support, somewhere, there must be information on how to achieve this, if only we could find someone who is a firmware programmer; i think if it were possible to remove these unneccessary steps from the firmware, or to create a new, bootable firmware, that this might shave some seconds off the startup time and also remove some other "hardware incompatibility" that has been observed as a result of the firmware "messing up" its configuration at boot time;

if only we could find someone who is a firmware programmer

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #97 on: June 03, 2019, 06:30:52 AM »
@ widter: How is this work going?

ive ordered a card on which to test with ; and ill be attempting to get this 'done' myself

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #98 on: June 03, 2019, 06:33:44 AM »
I'm watching the item below. Anyone use this?

https://www.ebay.co.uk/itm/142222150212

It does not support Mac OS 9.

the sil3114 has been confirmed to work on a powermac g4 under osx after being flashed with the sil3112 wiebetech firmware; i plan on attempting to do the same with the seritek 1s2 firmware;

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #99 on: June 03, 2019, 07:06:33 AM »
time to kick this up a notch + get this done - for the benefit of all ppc macos users worldwide
we need a new source of bootable pci cards
im not gonna sit back and watch losers sell tempo sata cards on ebay for 400$

Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #100 on: November 18, 2019, 06:32:35 AM »
Just bought a Tempo Sata X4p for experiments and modifications.
I'll change for sure the connectors (I'll add 4 internal serial ata connectors instead of the external ones) and I'll check if macos 9 can boot. Later, I'll check for the chipset and the ROM content.

Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #101 on: November 18, 2019, 06:57:36 AM »
Can someone post for me the exact codes/photos of the original seritek roms ? To be honest, instead of find a firmware programmer, I think I can simply buy a batch of 10/20 chipset compatible cards, swap the rom chips and sell them to you all.
Tell me if you are interested.

Offline IIO

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #102 on: November 18, 2019, 04:02:10 PM »
in my opinion it would even make a lot of sense if it was not bootable.

(best option to boot is a small SSD with a 3 euro adapter from ATA the 100 controller of the 2001 - mdd macs; in te case of quicksilver you easily get that SSD in the case in addition to 4 3,5" HDDs)

it just has to work properly in OS9 - including a simple to use option to update the firmware / reflash it for everyone - and people will buy it.

isnt the X4 a bit too pricey as basis? for what do you think you could offer modified cards?
"It is true that the "pre-emptive multitasking" advantage present in OS X can be illustrated by downloading CD-ROM ISOs and rendering chaos theory formulas while simultaneously instant messaging and posting on FaceBook what you ate... but in reality, what did you create?"
- DieHard, random forum troll at macos9lives.com

Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #103 on: November 19, 2019, 02:39:10 AM »
in my opinion it would even make a lot of sense if it was not bootable.

(best option to boot is a small SSD with a 3 euro adapter from ATA the 100 controller of the 2001 - mdd macs; in te case of quicksilver you easily get that SSD in the case in addition to 4 3,5" HDDs)

it just has to work properly in OS9 - including a simple to use option to update the firmware / reflash it for everyone - and people will buy it.

isnt the X4 a bit too pricey as basis? for what do you think you could offer modified cards?

I bought the X4 because I need it under mac os X on a G4 MDD; I'm curious to see if a drive or raid formatted with the os9 compatibility flag will work under os9, which is present on my G4 on another drive. The chipset on the X4 is probably a Marvell one; don't know how many cards around have the same chipset.

The idea is to buy some cards, which we know are compatible at 100% with the Firmtek chipset, unsolder the rom, put a plcc32 socket on the board and insert the rom which we know is compatible with the firmtek updater. I think we are in the range of 25-30 euro for a card. I'm doing some experiments with scrappy cards here to see if it can be done without problems.

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #104 on: November 20, 2019, 01:18:10 AM »
your best bet (highest rate of success) would be to find more sil3112 cards someplace

Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #105 on: November 20, 2019, 02:46:34 AM »
your best bet (highest rate of success) would be to find more sil3112 cards someplace

I bought from Amazon this card



The chipset is ok and I can buy them in good quantities. The only doubt I have is on the ROM chip position.
As you can see from the image, there are small components around, exactly where I wanna put a socket for the ROM. I have probably to solder the new chip directly on the board.

Offline IIO

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #106 on: November 20, 2019, 11:28:20 AM »
the final product should in all cases support JBOD
"It is true that the "pre-emptive multitasking" advantage present in OS X can be illustrated by downloading CD-ROM ISOs and rendering chaos theory formulas while simultaneously instant messaging and posting on FaceBook what you ate... but in reality, what did you create?"
- DieHard, random forum troll at macos9lives.com

Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #108 on: November 20, 2019, 05:45:09 PM »
1s2 ... "not compatible with quicksilver" :)

damn.
"It is true that the "pre-emptive multitasking" advantage present in OS X can be illustrated by downloading CD-ROM ISOs and rendering chaos theory formulas while simultaneously instant messaging and posting on FaceBook what you ate... but in reality, what did you create?"
- DieHard, random forum troll at macos9lives.com

Offline vectrex

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #109 on: November 20, 2019, 06:24:12 PM »
I recognize this is off topic but,

Also curious that the same seller listed above has a 256mb Nvidia card listed as compatible with OS 9 (No 3D accel):

https://www.ebay.com/itm/nVidia-Geforce-5200-256mb-AGP-Video-Card-For-Apple-PowerMac-G4-G4-Cube-VGA-x2/264411989688

they are also listing the radeon 9700 128mb here:

https://www.ebay.com/itm/ATi-Radeon-9700-PRO-128mb-AGP-Video-Card-For-Apple-PowerMac-G4-G5-AGP-OS-9/264514597602?hash=item3d964c72e2:g:gPMAAOSw7iZdt-cr


Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #110 on: November 21, 2019, 07:51:44 AM »
Update : I received the PCI card and, surprise, the chipset is Silicon Image 3512, not 3112.
As far as I know, the 3512 chipset is a revised version of the 3112, so....as I already wrote, I will try to solder the socket and put the new rom before try to update it with the seritek firmware. Let's see what happens....

(positive thing: the rom has no smd components around, so I can simply manage to solder the PLCC32 socket).

Offline IIO

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #111 on: November 21, 2019, 07:46:42 PM »
I recognize this is off topic but,

Also curious that the same seller listed above has a 256mb Nvidia card listed as compatible with OS 9 (No 3D accel):


he also has usb enclosures labelled as "firewire 400" ... as always, use ebay with caution :D

but it is great that someone at least cares about our retro OS and offers such cards.
"It is true that the "pre-emptive multitasking" advantage present in OS X can be illustrated by downloading CD-ROM ISOs and rendering chaos theory formulas while simultaneously instant messaging and posting on FaceBook what you ate... but in reality, what did you create?"
- DieHard, random forum troll at macos9lives.com

Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #112 on: November 22, 2019, 06:44:37 AM »
I recognize this is off topic but,

Also curious that the same seller listed above has a 256mb Nvidia card listed as compatible with OS 9 (No 3D accel):


he also has usb enclosures labelled as "firewire 400" ... as always, use ebay with caution :D

but it is great that someone at least cares about our retro OS and offers such cards.


Honestly....they don't care about retrocomputing at all. They simply stole works done by other from forums and groups and they try to gain money, that's simple. As you can see, they want 50$ from a card that, in quantity, you can pay under 10$; a compatible rom, if needed, is under 3$. Solder the new rom and put on the new firmware is something you can do in half an hour. I already seen this stuff around; a complete ripoff of a dac converter built by a guy on a public forum.....sold by chinese vendors at a price which is a 1/3 of the original one.

Offline IIO

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #113 on: November 22, 2019, 07:47:30 PM »
yes of course is it only a business for them, but as you say, it is 30 minutes work and the 45 euros would include shipping within europe - i would get one if it would support my QS machines.

no doubt i´d rather buy from you.
"It is true that the "pre-emptive multitasking" advantage present in OS X can be illustrated by downloading CD-ROM ISOs and rendering chaos theory formulas while simultaneously instant messaging and posting on FaceBook what you ate... but in reality, what did you create?"
- DieHard, random forum troll at macos9lives.com

Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #114 on: November 23, 2019, 09:24:42 AM »
Works started, first check of the pinouts of the rom chips.
They are phisically interchangeable for sure but some pins of the original memory are NC (pin 1 and 30); on the bigger rom chip are adress lines A17 and A18. Vcc is 5 volts, so no problems here (some chips run on 3.3 volts).

Offline Pushpull76

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #115 on: November 23, 2019, 09:45:02 AM »
On SiI 3512 chip, the address lines to check are pin 55-56.

Offline DieHard

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #116 on: November 24, 2019, 01:28:41 PM »
I am very curious if this end up to be an OS9 solution... Surprised Macstuff has not responded

Offline (S)ATAman

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Re: Disk Speed Upgrades (aka The Bootable PCI SATA & SSD thread)
« Reply #117 on: December 09, 2019, 06:13:46 AM »
for those who were reading the thread above.. the user named widter has informed me that he has no intention of making his firmware hack public now or in the future.. so the search continues.. hopefully i wont give up + ill eventually be able to find someone whos capable of backward engineering the firmware or downsizing it to fit a normal/common size rom chip

1) I have absolutely no need to reverse-engineer it. Guess, why... ;) 8) :P
2) You can't fit it in a smaller chip. The exceptions are the ATA cards. And that simply because hot-swap is not supported in the standard ATA. So the ATA code is much smaller than SATA.