Blizzard 1230 board - Jumpers and libs

[Hodgkinson]

Hi there,
Does anyone know what the jumper positions on a Blizzard 1230 MK-IV correspond to? For some odd reason the previous owner of the Blizzard 1230 board that I now have (68030+68882+64MB RAM) has somehow disabled the MMU, and I’m wondering whether closing the pair of jumper pins furthest away from the edge of the CPU (As they currently are) might cause this?
Should the card normally have no jumper links closed for normal operation with a 64MB RAM and 68882?

Also, I’m thinking of transferring this card to a different A1200. Are there any special libraries that are required for the 68030/68882/the 64MB of RAM to function at their best?

EDIT - Its a Phase 5 board, btw.

One last question – Any idea what the  "8MB RAM" jumper on a Blizzard 1200/4 RAM board supposed to do? I thought this board only had 4MB of RAM? Would it be for an add-on RAM card?

Thanks,
Hodgkinson.

[Donar]

I don't know the answers, but the manual should know them.

Unnoffical Phase5 support page

Go to manuals section and take a peek there  :-)

Oh one i know, you don't need special librarys for the Blizzard 1230.

[Hodgkinson]

Hmmm. Thanks for the site!

Sysinfo reports the MMU as "not in use" or somthing like that. Hence im wondering wether it could of been one of the jumper links - But the jumper pair I have just mentioned relates to the RAMSPEED according to the manual.

I think i'll just go and try removing it and see what happens.

Hodgkinson.

[Hodgkinson]

No difference. Sigh.
Sysinfo does report the MMU as "NOT IN USE".

Any idea wether a 6860 Zorro bus board might have a function for disabling the MMU by some means, or if OS3.0 might happen to not support MMUs? (Now im guessing...)

Thanks,
Hodgkinson.

[Doobrey]

Hodgkinson wrote:
Sysinfo reports the MMU as "not in use" or somthing like that

That just means Sysinfo found the MMU, but there's no software currently using it for anything.

[amiga92570]

The jumpers are for ram 60 or 70ns and bios cache.

[amigagr]

no you don't need any kind of ''special 030 libs''
bliz1230 info

[A4000_Mad]

Doobrey wrote:

Hodgkinson wrote:
Sysinfo reports the MMU as "not in use" or somthing like that

That just means Sysinfo found the MMU, but there's no software currently using it for anything.

 8-) thanks. I have always *wrongly* thought this to mean that it was missing or faulty.

@ Hodgkinson

Is this exactly what you are getting for your Blizzard 1230 MK IV?



I have also used a program called SysSpeed on mine:-



It gives a report FPU: 68882 (177Mhz) Is that an error?

A4000 Mad

[Damion]

Is that an error?

Yes. :-)

[A4000_Mad]

Doh! :bigcry:

A4000 Mad

[rkauer]

amiga92570 wrote:
The jumpers are for ram 60 or 70ns and bios cache.

Where is the BIOS of an Amiga? Amiga have ROMs, not BIOS!!!

If you want your Amiga a bit faster, put this line very early in your startup-sequence:

"CPU fastROM" (no quotes)

This line means "grab a image from the kickstart and remap it to fastRAM", that's what MMU are intended for, in Amigas.

[Piru]

Don't use SysInfo.

[Piru]

if OS3.0 might happen to not support MMUs?

AmigaOS does not use MMU for anything. That's why it's always unused.

If you want to use it, check mmu.library

[meega]

@rkauer,

1230-IV does that by default, iirc. You set the jumper to stop it happening, which frees up 0.5MB of fast RAM.

See A4000_Mad's second image above, Total Fast: 7.5MB.

[Piru]

@rkauer

If you want your Amiga a bit faster, put this line very early in your startup-sequence:

"CPU fastROM" (no quotes)

No. This is for the lame non-phase5 accelerators. Phase5 users should use MAPROM feature. Phase5 MAPROM does not use MMU at all, and thus leaves MMU free for other uses (+ it also works with CPUs without MMU, such as EC030).