Il my collection i found a 370 to slot1 adapter with 2 row of five jumper each one plus another single jumper in top, someboby know if this kind of adapter isfor mounting a cpu with lower vcore (less than 2.0v) in a mainboard made before the coppermine/tualatin come out? i have no manual and no tabels of jumper printed on the adapter
Could you upload some front & back pictures of it?
Here's the manual
Thanks... for what i can see is useless... thare is a model that work on a maninboard (IBM 300GL) that not support correct coppermine and tualatin voltage and no 133mhz?
That looks like a typical PPGA slotket, it probably supports only mendocino celerons. I have a similar looking slotket on which the dip switch is used to set CPU core voltage, it works only when all of the jumpers are at the bottom (closer to DIP switch) and when all of the jumpers are at the top, CPU core voltage is set "automatically" via CPU "VID" pins. You can find compatible "VID" table in any slot1/s370 CPU datasheet. JP6 connects to "BSEL_0" CPU pin, it selects between 66MHz and 100MHz (overclocK) FSB.
I've modded such slotket recently to be compatible with FC-PGA CPUs (coppermine), it's doable.
how to mod this adapter????
http://krick.3feetunder.com/370mod/
Did it probably between 50 and 100 times back in the day, except with masking the pin instead of ripping it off the socket, faster and less prone to failures (like oops just pulled wrong pin out). Saved about $10 buying PGA vs FCPGA slotkets.
I was quite prolific when it came to selling budget gaming rigs in 1999-2010.
Slot1 taped B21(still remember pin designation to this day 😮), 3 more taped pins for 2.2-2.4V Vcore and bam 450-550 MHz CPU at a fraction of P2/P3 price on budget BX/ZX Zida boards.
Mendocino Celerons tapped out around 550 MHz, so overclocking PGA variants was most optimal with C366 model, anything higher and you maxed out at lower FSB (466@83, 466@75 etc).
FCPGA was good to 1GHz, with late steppings overclocking all the way to 1150 MHz! Selling overclocked Coppermine Celeron vs Duron was a tossup. Pretty much same performance, with Intel being slightly cheaper while AMD more modern/upgradeable.
Good times. Things got boring after Slot1 era for me, avoided Intel P4 altogether and went selling AMD full time until Core 2 came out.
https://github.com/raszpl/FIC-486-GAC-2-Cache-Module for AT&T Globalyst
https://github.com/raszpl/386RC-16 memory board
https://github.com/raszpl/440BX Reference Design adapted to Kicad
https://github.com/raszpl/Zenith_ZBIOS MFM-300 Monitor
I know this is a pretty big necro, but I just wanted to say thank you to rasz_pl for suggesting the tape method. I just successfully modded a 370SP Rev 1.0 slotket using one wire and a small section of adhesive backed label in front of the grounded pin to block the connection.
Much faster and easier than removing the pin and completely reversible if necessary.
NeoG_ wrote on 2025-02-11, 11:49:I know this is a pretty big necro, but I just wanted to say thank you to rasz_pl for suggesting the tape method. I just successfully modded a 370SP Rev 1.0 slotket using one wire and a small section of adhesive backed label in front of the grounded pin to block the connection.
Can you please post a nice close up photo of that slotket ?
PARKE wrote on 2025-02-11, 14:06:Can you please post a nice close up photo of that slotket ?
Apologies I didn't see the notification, here are the pictures. I had to take it out of a working system so don't mind the thermal paste.
Thanks. Have fun with the mod.
