RacoonRider wrote:What are the empty sockets near the CPU socket? Perhaps the board is missing something. A VRM?
The component markings are : SMTB000 G . It seems it is some sort of signal terminator or something? It is currently set to RP11:S-Series and RP14:DX/P24C/S/M7 .
Here are some pictures:
I have tried setting it to AMD-SL with AMD DX2 66MHz, but no POST.
Also, I am confused as to what J15 is. It has markings SM0, SM1, SM2 and SM3.
shamino wrote:If you have (or can find) a pinout for this CPU socket, maybe you can measure the Vcore that it's getting to the CPU. That woul […]
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If you have (or can find) a pinout for this CPU socket, maybe you can measure the Vcore that it's getting to the CPU. That would be a good thing to check in case it's the reason it won't POST.
If you have a capable meter, maybe you can also measure the FSB speed that it's getting.
I'm pretty much a noob with 486s. I was a noob in those days, and I haven't thought much about them since.
But I think a wait state of 1 would be more likely to POST and wouldn't hurt anything. If 0 works, I think 1 will also work, but not the other way around. So I'd try 1 for now. I'd also try to put the bus speed on 20MHz.
I'm confused why there are 2 clock settings.
On the jumpers, I would guess that the pins closest to the keyboard port are pin 1, because that's how they're labeled at J9, J10, and J11. On the vertical jumpers, pin1 is pointing towards the direction of the memory slots (it's marked this way at J32 and J33).
Usually they keep it consistent across the board.
It has a jumper selector for either 5V or 3.3V (no 3V or 3.45V). There are two clock settings in case a different chip was used. Chip used on this board is KDN-1402C (That's why one table references to KDN-1401/2C). The board was configured for 33MHz KDN-1402C.
And yeah I noticed later by looking at J33 and J32 how to orient.
I have tried an 66MHz 3.3V processor but still no POST. As well as some 9 chip SIMM memory. Maybe my memory is 4x9 and not 1x36? I read in the chipset manual that it has to be 1x36.
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Here is all the jumper information text from the board:
J3 | M1 | M2
1.2 | BANK0 | BANK1 | S.S
2.3 | BANK0,1 | BANK2,3 | D.S
J4:SIM1-4 BANK SELECT
1,2:BANK0 | 2,3:BANK2
CACHE | J10 | J11
128K | 1,2 | 1.2
256K | 1,2 | 2,3
512K | 2,3 | 2,3
CPU | J13 | J14
P24D | 1,2 | 1,2
M7 | 2,3 | 1,2
AMD- SL | 2,3 | 1,2
OTHER | 1,2 | 2,3
Clock Controller KDN-1402C or KDN-1401
MHZ | 20 | 25 | 33 | 40 | 50 (S = Sh = Short , O = Op = Open)
-J18 | Sh | Sh | Op | Sh | Op
-J19 | Sh | Op | Sh | Op | Sh
-J20 | Op | Sh | Sh | Sh | Op
J21:DX4 Install
1-2:DX4
2-3:Normal
J22:CPU CLK ADJ
1-2:DEFAULT
2-3:ADJUST
J23
S:>33MHz
O:<=33MHz
J24
S:1 WAIT
O:0 WAIT
J25:CPU SEL
O: P24C/DX4
S: AMD-SL
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