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Dang, edit window elapsed! :rolleyes: Intent of low profile TwinSlot risers config is to enable installation of a capable VidCard along with multifunction I/O card into low profile drawers and TAM FatBack. Implied, but not stated above.

Indeed! I wouldn't so much ascribe such to Apple's nefarious hobbling strategies, but to the necessity of cost cutting for that market niche. Clocks rose and prices fell dramatically for CPUs in that 1996-1997 time slice of the day. Support chips might differ in performance as well in that time...

Fabulous work, much impressed! Video is still pretty crappy even on the 4MB VRAM of Gazelle's 50MHz ATI chipset subsystem in my book. That's why I've developed TwinSlot Risers for my 6360, the other single slot AIOs and another For TAM. Haven't figured out how to wedge three slots into the...

Nothing was close that I've found to date.

Portable LCD and alternate Logic Board build tangent has its own topic, this one is for NuBus Dreams. ;)

Tangential maybe? Can't help but think of using such a beast in the Luggable! Driving it's LCD interface would be the major stumbling block. Redesigning the existing SE/30 reload board to fit the Portable form factor is something I've discussed in PM, possibly in a topic?

Wish list for the new year: @Melkhior you mentioned development of a whole new board based on FPGA. Reverse engineering the LCD interface is something that needs to be done for yours and all manner of Luggable upgrade projects. That said, finding a modern (HiRes Color!) replacement in Portable...

Nap. OS9 forever. ;)

Figures they'd be discontinued. Was thinking in terms of an external modem/WiFi doohickey for old world/old new world Macs with limited slots and pokey onboard networking. 2x-3x the speed of 100mbps would be (might have been) nice.

But wouldn't that be about 3x faster than 100BASE-T? Not Gigabit for sure, but a significant improvement over onboard Ethernet, no?

Been wondering about this on and off for a while now. Not sure FireWire interface could support such a critter? A faster external NIC (WiFi?) for slot limited PCI Macs seems worthwhile? Original concept was for TAM and 6x00 by extension. Dunno how much performance a GigaBit NIC(?) over FireWire...

Nice! 6x00/5x00/6360 to PicoPSU a/o ATX PSU is the one conversion I've yet to find anywhere. Could you post it please? Got PicoPSU and adapter cable, just need to find my MOLEX pin removal tool and rewire the cable. As for mounting a board, best possible solution is to start with 6x00...

It's just a notion I'd been kicking around with @Bolle for a while. It made a lot of sense when 128MB was very expensive, but such became available at fairly reasonable pricing, so that project is back-burnered to curiosity level for now. I have a new logic board to play with at some point, so...

Interesting, never thought to look at that as I've been target fixated on the main line TwinSlot Riser development threads. My board does not have passthru of the reserved lines from Slot_A1 so I'll be terminating the six signals there just as I've been thinking of for PCB design. Thanks to...

Not so silly, I like the SIPP Socket suggestion. That readies the board for a 72pin SIMM daughtercard conversion "upgrade." No increase in memory, but a cheap way to max it out.

Here we go! @Daniël do the "PCI Reserved" traces on your riser make it a the way through Slot_A1 to Slot_B1 and Slot_C1? I haven't even bothered to check. I'll be connecting all the jumpers to Slot_A1 as implemented on the successfully tested CableMonster.

Yep, saw that and also the very odd spacing of the tentacle contacts, thanks for the confirmation. Is that a generic riser or one intended for a specific mfr? The PCB layout seems more complicated than running the bottom slot traces 1:1 would be?

Interesting, every Riser I've tried had the bottom slot as a straight thru connection, taking on the ID of whatever board slot in which thet've been placed. This was true across a couple of non-tentacled risers and three or four with tentacles. The top two slots of mine have the tentacles...

@Daniël Could you post the wiring diagram for your conversion of that three slot riser, please? Getting ready to buzz mine out and comparing notes seems a good idea. Thankfully my riser has .01 headers for wire wrapping, planning to bodge Apple's reserved line connections to the adapter card...

I just ordered up one of these, it might help in your use case: It'll sit my three slot PC riser with cards vertical, the three slot riser easily clearing the fan on the CPU and the Battery. https://www.ebay.com/itm/331596048584