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LC 475 Project - Upgrades - Mods
- Thread starter Kamshaft
- Start date
I think they've been out of business for a long time. I have no idea how their web site stays up.
Just the single bus
You won't get an answer - that site, despite being up, doesn't represent a business that is operating anymore.
Yeah, there's a person there. People have called them before and been able to talk to them. They don't have any stock left.Someone is getting those emails - Email didn't bounce back.
Someone leaves it up to cause suffering and misery. We wail as we look at all the stuff somebody should have bought and stockpiled. We didn't know then that all that stuff was going to be unobtanium later in life. Woe, woe to use. Hear our lamentations.
One has to wonder why they’re still there answering the phones, in that case….
So, today I ordered the full 68040 @ 33Mhz from the ebay.ca link I posted above. They were asking $70 USD for one, and I offered $60, they accepted. Maybe I should of offered lower. 
I'll be doing the resistor swap mod / overclock. Plus I ordered a 45mm x 45mm x 10 mm heat sink, along with double sided thermal tape.
Fingers crossed!
I'll be doing the resistor swap mod / overclock. Plus I ordered a 45mm x 45mm x 10 mm heat sink, along with double sided thermal tape.
Fingers crossed!
Sweet! Thanks!
I picked up another 64mb simm from here, it arrived today and works!
64MB EDO 72pin Low Profile SIMM Ram MEMORY for Amiga Blizzard 1230IV 1230 IV | eBay
Compatible with Amiga Blizzard 1230 IV.
www.ebay.com
Picture of my Q605, 52mhz with 68040RC33, 60ns VRAM and spicy o clock. I’m experimenting with the 3D printed fan duct, need to compare cpu temps with/without.
Attachments
Chips in the EBay offer are KM44V16104BK-5: 50ns, 4k Refresh 3,6V maximum Supply Voltage.
No Voltage regulator visible on front side.
The chips in your Macintosh are different but not readable from the photo (Samsung K4E6... I guess)
Do you like to tell what chips you got?
I am very interested on the experience with the fan duct. I am planning a similar one.
No Voltage regulator visible on front side.
The chips in your Macintosh are different but not readable from the photo (Samsung K4E6... I guess)
Do you like to tell what chips you got?
I am very interested on the experience with the fan duct. I am planning a similar one.
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I picked up another 64mb simm from here, it arrived today and works!
64MB EDO 72pin Low Profile SIMM Ram MEMORY for Amiga Blizzard 1230IV 1230 IV | eBay
Compatible with Amiga Blizzard 1230 IV.www.ebay.com
Picture of my Q605, 52mhz with 68040RC33, 60ns VRAM and spicy o clock. I’m experimenting with the 3D printed fan duct, need to compare cpu temps with/without.
I just order one, since mine only had 16MB.
Am I right you changed MC88920 into MC88916?
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yes, I forgot to include, it is an MC88916W80
what is the difference? I can’t spot it in the spec sheet, they’re both low skew pll clock drivers…. Is it for the higher clock ?
MC889xx need to be able to work with double CPU clock.
MC88920 is specified up to 50Mhz, MC88916W70 up to 70Mhz and MC88916W80 up to 80Mhz.
So for 40Mhz CPU clock an MC88916W80 is the appropriate choice. Others may or may not work.
Maybe Brooklyn is able to tell what is needed to change this chip.
MC88920 is specified up to 50Mhz, MC88916W70 up to 70Mhz and MC88916W80 up to 80Mhz.
So for 40Mhz CPU clock an MC88916W80 is the appropriate choice. Others may or may not work.
Maybe Brooklyn is able to tell what is needed to change this chip.
You’ll need a chip and tools/skills to do surface mount soldering. If you don’t change this IC, 33mhz is no problem. If you mod for 40 MHz, I found it actually only runs about 38 MHz with the stock MC88920. Any more likely needs the MC88916W80.
