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On 7/22/2020 at 4:52 AM, MacNiels said:

Nice find! Curious what speed the accelerator will be. 

The IIsi arrived super well packed, thick bubble wrap cocoon, but something was rattling inside... and yep it was the Turbo 040 card! Ugh. Must have shook loose during shipping. (Note to self, remember this for future shipping instructions to sellers...)

 

I put it in my known good IIsi, crossed my fingers and yep it booted right up, noticeably faster... The Happy Mac boot icon has a little “Turbo 040” marking now!  I installed the DayStar QuadControl Control Panel and it’s a 33Mhz model with 128KB cache, firmware 4.01. :lc::lc::lc:

 

 

Edited by Fizzbinn
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DA205F49-0B99-4500-8747-555271806351.jpeg.8ad2c99ca8c41fe08698169ffc4165c6.jpeg

 

So I tested my new Turbo 040 using my known good IIsi with its known good DayStar PDS to Cache slot and PDS pass through adapter card. The similar adapter card that came in the “new” IIsi had a problem, a missing capacitor on the back of the card that I found under the floppy drive...

 

Top - my good adapter, bottom the new one:

CDBA045F-C8D2-4D3E-8B94-00FFE7CE6064.jpeg.fa9761afc293f14569d22f84e357f8c3.jpeg
 

The broken off capacitor next to the damaged pad:

FB8FE5BB-F118-42DD-AB2E-C6FAB7160CEE.jpeg.3859f8831e674c71964233f95af601a6.jpeg

 

Zoomed in:

3B368512-32DD-4617-9BD3-440C39AB61E0.jpeg.7ca3fc9402cf2a137644f148ab9c62ae.jpeg

 

And my repair:

47A49B7F-5C94-485A-A333-8AD5088C395D.jpeg.3dd9d4a90df5bde8e89b2c389d1cd5cb.jpeg


I used a smaller package size 10uf capacitor since it’s what I had but since one of the pads was lifted/snapped off with the wrecked capacitor and I had to use a wire from the via to the pad it didn’t really mater. Swapped it in and everything seems to be working/good! :lc:
 

One thing I’m excited about with the new adapter is it’s Cache connector is offset/set back which means I can use an Asante Ethernet PDS card and it’s rear external port board (which is blocked when using the other adapter board with aligned Cache and PDS pass through connectors.
 

Unobtainium obtained! (...after a year of scouring eBay)

Edited by Fizzbinn
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On 7/30/2020 at 12:42 PM, Fizzbinn said:

Unobtainium obtained! (...after a year of scouring eBay)

Goes to show that with enough persistence, even unobtanium can occasionally be obtained by common people at common prices :)

 

Good job!!

 

c

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  • 4 months later...

I found a Centris 610 on eBay that looked to have something interesting inside, a Sonnet QuadDoubler. I jumped on it just for the QuadDoubler, thinking it might be a great upgrade for my 605 or 700. :)
 

B79AAFDF-A618-4771-94DF-EB3F1AE821B0.jpeg.b63a3c1d915f33f8f7a963e1e9f147d3.jpeg

27CB3B75-7915-49B5-9F2F-E44B60F13975.jpeg.fec1c4e260845b45129b52ec55fcd4bb.jpeg

 

I hadn’t looked at/thought about these case style Macs much but they are actually somewhat interesting on their own. I just wish they had soft power, I guess I give the 605 a pass due to its smaller size?

 

True to the description it wouldn’t boot, start up chimes followed by death chimes. I spent the a bunch of the weekend cleaning up the motherboard, re-soldering some chips with loose pin legs, and recapping. As I have to remind myself happens sometimes this all turned out to be for naught, startup behavior unchanged. :(
 

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With the Centris 610 down for the count I gave the QuadDoubler a try in my 605.

 

A815AF57-B60F-4600-9D88-D3CCA9A1E8D3.jpeg.81fda4c032fbf1b678a1df228f82a2ce.jpeg
 

...and it booted just fine, 50MHz!  Things seemed good and then after 15 min or so, crash. Overheating likely since it’s probably only meant to run at 40Mhz (2x20Mhz speed of the C610).  As a test I moved the case fan on top of the heat sync and it seems stable now.

 

BD19FF53-8E55-4514-8A27-9EA8841BCFD6.jpeg.ffa8cfc190dc6fc743011e37910ce43b.jpeg

 

I’d need to figure out a better solution make this work longer term (be able to close the case). But oh so snappy! Benchmarks:

 

7515661A-F8B6-4539-9F67-FC7CBD2BC510.jpeg.6553ad34b90de50e03807ae0aec21fb9.jpeg

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Bummer about the 610. Seems this form factor us reaching its halflife of sorts, what with the problems posted so specifically about this board.

 

Any luck testing the QuadDoubler in another machine?

 

Edit :Ha! Simulpost :lol: Or so I thought.

 

Oh well. Nice numbers!

Edited by jessenator
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1 minute ago, jessenator said:

Bummer about the 610. Seems this form factor us reaching its halflife of sorts, what with the problems posted so specifically about this board.

 

Any luck testing the QuadDoubler in another machine?

Just posted on that, silver lining on the weekend!

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  • 4 weeks later...

So picked this 68040 upgrade card up on eBay BIN (with an Dayna PDS Ethernet card) for $61 shipped:

C6E96EE5-A13E-4D53-86E6-4BD505E2A6ED.jpeg.ab47f86cbcc99e2882ac72b8e1c4e715.jpeg
 

Anyone know anything about these? Applied Engineering Transwarp/TW 6400 from 1993. Looks like it’s 33MHz, didn’t have a pic of the other side, wonder if there is an optional cache module? Googling doesn’t really turn up much, info or driver wise....

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3 hours ago, Fizzbinn said:

Anyone know anything about these? Applied Engineering Transwarp/TW 6400 from 1993. Looks like it’s 33MHz


Not much turning up I'm afraid.

From here: https://archive.org/details/macworld00unse_88/page/40/mode/2up?q="Transwarp+6400"
 

Quote

TransWarp 6400
This line of 68040 accelerators fits the Macintosh llsi, llci, llvi, llvx and Performa 600 and has models that run at 25MHz, 33MHz, and 40MHz. The card plugs into the PDS and comes with a 128K cache. The llsi version requires an adapter. 25MHz with FPU $999; 33MHz with FPU $1199; 40MHz with FPU $1499; llsi adapter $49. Applied Engineering, 214/241-6060, 800/554- 6227; fax 214/484-1365


 

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