I'll throw a knuckleball into the works at this point, this one has been on back burner for quite some time, but I just remembered a recently downloaded pic of a similar adapter.
Instead of moving just the 72 pin DRAM ICs back a form factor generation. Move the entire 72 pin SIMM back a generation by converting a 72 pin socket (or more?) to the older 30 pin SIMM form factor.
I've always wanted to do a "reversed-funnel" SIMMspender™ hack of ye 'ole SIMMsaver Hack. Three bare minimum profile RAS-CAS line address transfer SIMMs would be wired up to one larger SIMM that lays a 72 PIN SIMM flip-flopped right back across the top of them.
View attachment 16952
Maybe it's more of a Knucklehead throwing a Screwball into the works here. All the signals would need to be reversed to match the banks of the "backwards" 72 pin SIMM socket.
Installation of the adapter SIMM and the 72 pin SIMM will probably need to be done simultaneously to keep the adaptation low profile. hold the two ready to click into their slots then and push them down together like two legs of a parallelogram for near simultaneous clicks.
Removal should be fun too! }
The original concept involved a single adapter PCB and patch wiring the additional connections. This way no MoBo modding would be required. It'd be a lot more straightforward for most to do.
These are the less attractive configs available in terms of height.
The top version should be easier to install, but the overhang may not fit in the SE/30.
The middle version uses a more difficult to source flat SIMM Slot Connector and the screwball wiring setup. Probably low enough for most Macs.
The bottom version uses it as well, but could be silly looking and use the angled connectors for a straight thru, but very high config.
The lower two, with jumper settings to re-arrange the RAS/CAS line feed, might be staggered to convert adjacent banks.
Three of the four might work in tandem banks.
My first choice, the most difficult to install of course, along with the top, of the alternate choices, might work in a 4x4 bank config if right and left handed versions were to be made available.
. . . or it's a silly idea all together due to SIMM type incompatibility. :-/
Instead of moving just the 72 pin DRAM ICs back a form factor generation. Move the entire 72 pin SIMM back a generation by converting a 72 pin socket (or more?) to the older 30 pin SIMM form factor.
I've always wanted to do a "reversed-funnel" SIMMspender™ hack of ye 'ole SIMMsaver Hack. Three bare minimum profile RAS-CAS line address transfer SIMMs would be wired up to one larger SIMM that lays a 72 PIN SIMM flip-flopped right back across the top of them.
View attachment 16952
Maybe it's more of a Knucklehead throwing a Screwball into the works here. All the signals would need to be reversed to match the banks of the "backwards" 72 pin SIMM socket.
Installation of the adapter SIMM and the 72 pin SIMM will probably need to be done simultaneously to keep the adaptation low profile. hold the two ready to click into their slots then and push them down together like two legs of a parallelogram for near simultaneous clicks.
Removal should be fun too! }
The original concept involved a single adapter PCB and patch wiring the additional connections. This way no MoBo modding would be required. It'd be a lot more straightforward for most to do.
These are the less attractive configs available in terms of height.
The top version should be easier to install, but the overhang may not fit in the SE/30.
The middle version uses a more difficult to source flat SIMM Slot Connector and the screwball wiring setup. Probably low enough for most Macs.
The bottom version uses it as well, but could be silly looking and use the angled connectors for a straight thru, but very high config.
The lower two, with jumper settings to re-arrange the RAS/CAS line feed, might be staggered to convert adjacent banks.
Three of the four might work in tandem banks.
My first choice, the most difficult to install of course, along with the top, of the alternate choices, might work in a 4x4 bank config if right and left handed versions were to be made available.
. . . or it's a silly idea all together due to SIMM type incompatibility. :-/