Getting maximum performance from Blizzard 1230/IV

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snoopy77

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Hi guys,

Just bought one and I’ve noticed with this card that the sys info screenshots from people often falls into two categories, MIPs between 8.8-9.0 or mips around 9.8-10.0

Just bought a card with 32mb and it is around 8.9-9.0,

I’m guessing pretty much everyone is loading KS into memory (since that is the standard setting) so I’m wondering if the other big differentiator might be the memory speed and whether people are using the the SPEEDRAM jumper or not? Mine doesn’t have the jumper so I’ll try and get a jumper and see how it goes. The code on the memory is VT-517404-6 so I’m assuming it is 60ns? In that case adding the jumper should speed it up.

Couple of questions,

-Do you think the typical jumpers sold on ebay is going to suitable? They seem to be mostly 2.5mm, putting a ruler against the board that looks about right size wise but it is pretty hard to tell when the size is that small.

-Alternatively do you know what type of old hardware might have some jumpers I could use (have a broken a500, a520 modulator and some other stuff that could be sacrificed). Before I open everything up to look for one was just wondering if anyone knows of hardware that often has them.

-Anyone have experience with the speed of ram and mips performance with this board? e.g. 70ns down to 60ns, or 70ns down to 50ns.

Apart from the ram, is there anything else that could likely account for the 1 mip speed difference that people seem to seeing?
 
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the jumper is a 2mm type.


as for ram speeds,its the other way around 50ns is faster than 60ns than 70ns etc.60ns is fine.

you just need to jumper it so its kickstart to fastram and 60ns access,job done.
I.E: no jumper on maprom, jumper on the other one for 60ns
 
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Cheers Roy, can see some of them on ebay called "micro jumpers- laptop hard disk" etc


Only Amiga makes it possible!
 
Cheers Roy, can see some of them on ebay called "micro jumpers- laptop hard disk" etc


Only Amiga makes it possible!

thats the ones i got,i got some once for scsi drives as well, the 2.54mm ones wont fit properly.
 
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Actually I forgot what reading mine is giving (i'm at work - can check later) but i'm pretty sure it is less than the average.

Since I already have KS3.1 would it make sense / possible to completely disable maprom or will this make no difference ?

Also, since I am running it with a 64MB ram simm, I guess it can set ram speed jumper to the fastest 60ns ?

Anything else to make it faster ? Force burst mode or something ?
 
it makes no real sense to run these cards slower than normal.
and it is worth having the card remap the kickstart.

as for the simm the last couple of numbers is usually the speed of the simm.

i do use a piece of software to enable all the caches in the system,i'll see what its called and post a link the aminet,although i mainly use it on 040 and 060 systems but it will work with any 68k cpu.


EDIT: i use this,read the docs first though as you will have to add a line to your startup sequence.
http://aminet.net/util/wb/SystemPrefs.lha
 
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Remapping the ROM image into Fast RAM = Faster access to the libraries within KS. :)
 
Ok. Maprom was already enabled (No jumper)

My RAM is 60ns but there was no jumper. I installed a jumper on it.

Sysinfo says Mips is 8.94 - Is that good ?

With DBurst enabled it gives me 9.02 Mips
 
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Ok. Maprom was already enabled (No jumper)

My RAM is 60ns but there was no jumper. I installed a jumper on it.

Sysinfo says Mips is 8.94 - Is that good ?

With DBurst enabled it gives me 9.02 Mips


yes thats pretty good/normal.

have you noticed its a different score in sysinfo every time the machine boots?:lol:
interesting that.
 
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it makes no real sense to run these cards slower than normal.
and it is worth having the card remap the kickstart.

as for the simm the last couple of numbers is usually the speed of the simm.

i do use a piece of software to enable all the caches in the system,i'll see what its called and post a link the aminet,although i mainly use it on 040 and 060 systems but it will work with any 68k cpu.


EDIT: i use this,read the docs first though as you will have to add a line to your startup sequence.
http://aminet.net/util/wb/SystemPrefs.lha

Oooh after installing this i'm getting 9.67 and thats with dburst off [Edit - After installing this and getting 9.67 it doesnt care in sysinfo if dburst is on or off] :p
 
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it makes no real sense to run these cards slower than normal.
and it is worth having the card remap the kickstart.

as for the simm the last couple of numbers is usually the speed of the simm.

i do use a piece of software to enable all the caches in the system,i'll see what its called and post a link the aminet,although i mainly use it on 040 and 060 systems but it will work with any 68k cpu.


EDIT: i use this,read the docs first though as you will have to add a line to your startup sequence.
http://aminet.net/util/wb/SystemPrefs.lha

Oooh after installing this i'm getting 9.67 and thats with dburst off [Edit - After installing this and getting 9.67 it doesnt care in sysinfo if dburst is on or off] :p


good isent it?:)
it sets it at startup,so you dont have to mess with it after.
 
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Hi guys,

My mini jumpers from ebay arrived the other day,

Here is the results without the jumper and with the jumper,

For each I did 5 tests (with a reboot between each one)

No SPEEDRAM jumper - 60 ns Simm -5 results

MIPS - Sysinfo

8.81
8.81
9.02
8.81
9.02

Average = 8.894 MIPS

With SPEEDRAM jumper On - 60 ns Simm - 5 results

MIPS - Sysinfo

9.9
9.9
9.67
9.67
9.9

Average = 9.808 MIPS

So the addition of a jumper added 10.2% to the MIPS score.

Next I'm going to follow Roy Bates suggestions above and I'll post back on how that changes things for me (Cheers Roy)
 
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no probs,it looks as though its performing as stated.:)

the manual says with the jumper in place its a 10% increase in speed.
 
Very interesting i nver noticed about the 10% increase :)

will look later
 
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