It worked. I replaced a 300MHz CPU for a 400MHz CPU. I only had to
change the clock multiplier from 4.5 to 6 by removing jumpers 3-4 and 5-6
(see table below)
SunPCi booted up saying it had a 400. No problems yet.
==================================================
| Frank Velazquez |
| Siemens Information and Communication Networks |
| frank@hwdev.icn.siemens.com |
==================================================
On Tue, 10 Oct 2000, Frank Velazquez wrote:
>
>
> Original question:
> I have some "old" SunPCi cards with the 300Mhz processors. Is there any
> way to upgrade the processor on this card?
> -----------------------------------------------------------------------
>
> I finally received a response from Wieland Stübinger that has all the
> info I need. It's in German, but still readable.
>
> After talking to him on the phone, I have a pretty good understanding of
> the tables below.
>
> He tried various jumper settings and came up with the following tables.
> JP4 is the set of jumpers located next to the CPU. It specifies the clock
> multiplier.
>
> JP1-3 is located next to the DIMM slots. These jumpers set the clock
> frequency. If you look at the table below, you can see that the frequency
> seems to depend on the multiplier.
>
> Anyway, it looks like you should be able to change out the 300Mhz CPU for
> a 400Mhz CPU by just changing the multiplier from 4.5 to 6. I'll give it
> a try and post results.
>
>
>
> Thanks Wieland and good luck in Singapore.
>
> Frank
> ==================================================
> | Frank Velazquez |
> | Siemens Information and Communication Networks |
> | frank@hwdev.icn.siemens.com |
> ==================================================
>
>
>
> Wieland's post here:
> -------------------------------------------------------------------------
>
> JP4 = Clock-Multiplier
> ----------------------
>
>
> 65
> 43
> 21 die 3Jumper direkt nebe der CPU
> -----
> |CPU|
> -----
>
>
> | | bei 66.8 |
> | 2 4 6 | MHZ Bustakt |
> | 1 3 5 | ergibt dies |
> -----|-------|-------------|
> 6 | x | 400 |
> 5.5 | x | 366 |
> 5 | x x | 333 |
> -----|-------|-------------|
> 4.5 | x x x | 300 | ---> Default bei meinem Board
> 4 | x x | 266 |
> 3.5 | | 233 |
> -----|-------|-------------|
> 3 | x | 200 |
> 2.5 | x x | 166 |
>
>
> bei 6*75Mhz --> sollte (nach Chipsatz) 450 Mhz möglich sein
>
>
>
> JK1-3 = Frequenz
> ----------------
>
> 1 2 3 Default= 66,8 Mhz
> JK3 - - . |
> JK2 - - . | Boardaußenseite
> JK1 - - . |
>
> x x
> x x
> x x
> x x
>
> DIMMS
>
>
>
> Ich habe einjach male "rumgejumpert" und die Karte gebootet.
> Die Mhz-Werte sind die, die das BIOS gezeigt hat und die
> angegebene MHZ-Zahl ist die umgerechnete Zahl Freq/Teiler.
>
> Die wirkliche Freq. konnte ich nicht ermitteln, da der 350er
> nicht immer stabil gebootet hat ... ist ja auch was viel verlangt ...
>
>
> Es scheint nicht direkt der Bustakt eingestellt zu werden !!!!
>
> | 6.0 | 5.5 | 5.0 | 4.5 | 4.0 | 3.5 | 3.0 | 2.5 |
> ----------------------------------------------------------------------
> --. | 400 | 366 | 333 D 300 D | 233 | | |
> --. | | | D D | | | |
> --. | 66.68 | 66.55 | 66.60 D 66.68 D | 66.57 | | |
> ----------------------------------------------------------------------
> .-- | 400 | 266 | 333 | 300 | | 240 | | |
> --. | | | | | | | | |
> --. | 66.68 | 48.36 | 66.60 | 66.68 | | 68.57 | | |
> ----------------------------------------------------------------------
> .-- | 400 | 400 | 366 | 366 | | 266 | | |
> .-- | | | | | | | | |
> --. | 66.68 | 72.73 | 73.20 | 81.33 | | 76.00 | | |
> ----------------------------------------------------------------------
> .-- | 400 | 400 | 400 | 366 | | 266 | | |
> .-- | | | | | | | | |
> .-- | 66.68 | 72.73 | 80.00 | 81.33 | | 76.00 | | |
> ----------------------------------------------------------------------
> --. | 300 | 300 | 266 | 240 | | 193 | | |
> .-- | | | | | | | | |
> .-- | 50.00 | 54.55 | 53.20 | 53.33 | | 55.14 | | |
> ----------------------------------------------------------------------
> --. | 333 | 300 | 300 | 266 | | 210 | | |
> --. | | | | | | | | |
> .-- | 55.00 | 54.55 | 60.00 | 59.11 | | 60.00 | | |
> ----------------------------------------------------------------------
> .-- | 366 | 333 | 300 | 266 | | 210 | | |
> --. | | | | | | | | |
> .-- | 61.00 | 60.54 | 60.00 | 59.11 | | 60.00 | | |
> ----------------------------------------------------------------------
> --. | 400 | 400 | 366 | 333 | | 266 | | |
> .-- | | | | | | | | |
> --. | 66.68 | 72.72 | 73.20 | 74.00 | | 76.00 | | |
> ----------------------------------------------------------------------
>
>
> - bei 5.0 schein mit 400Mhz und 80Mhz Bustakt das Maximum erreicht zu
> sein ...
>
> - ich fahre die 300er (=350er) mit 366 bei 5.0 (73,20) und es geht ...
> ---> 366 bei 4.5 und 81,33 war mir was viel, angeblich kann
> der Chipsatz ja nur 75 Mhz
> --
> ---
> *Wieland Stübinger Tel.:Office 49-89-722-36108 *
> *82031 Grünwald e-mail: stuebi@stuebi.de *
> *Germany nic-hdl: WS6-RIPE *
> * Real programmers don`t comment. *
> * Something hard to write should be hard to read. *
>
>
>
> S
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