English Amiga Board - A600 and Furia, FPU not working

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- - A600 and Furia, FPU not working (https://eab.abime.net/showthread.php?t=91118)

DerJens

06 March 2018 23:47

A600 and Furia, FPU not working

Hi all,
i just bought a new Furia EC02 Rev.2 for my Amiga 600 (Kickstart 37.300) and can't get the FPU on the card working. When i boot Workbench 2.1 from floppy, ShowConfig shows me the 68EC020 CPU and the extra memory but not the FPU.

When i use furiatune

Code:

furiatune status

shows FPU off

When i now try to activate the FPU via

Code:

furiatune FPU on

i got

Code:

FPU off

on the console. The status command still reports the FPU as off. When i use

Code:

furiatune FPU off

i got

Code:

FPU on

and status still reports the FPU as offline. I tried version 1.1 and 1.2 of furiatune, same result on both versions.

I'm now not sure if my card maybe has a hardware problem and if i should return it. Or do i need something to do to activate the FPU correctly ?

emufan

07 March 2018 00:13

hi,

did you reboot after 'fpu on' command ?
maybe like this: furiatune fpu on reboot

DerJens

07 March 2018 00:21

Yes, i also tried this with the reboot parameter in furiatune, nothing changed. I also reinserted the card several times to ensure the connection to the 68k CPU works. Before installing the card i cleaned all pins on the 68k CPU.

emufan

07 March 2018 00:29

and there is a fpu chip on the board? :)

contact the shop you bought the card from. ask them what to do.

Amiga1992

07 March 2018 00:38

Quote:

Originally Posted by emufan (Post 1224812)

and there is a fpu chip on the board? :)

Good point. Not all Fúrias have an FPU.

emufan

07 March 2018 01:29

Quote:

Originally Posted by Akira (Post 1224816)

Good point. Not all Fúrias have an FPU.

ya, maybe they sent him the wrong model.
in this case I would contact the shop.
ebay lists the chips for US$ 3.80 or $US 3.28 from china.
here is the board with fpu present. the chip in the brown socket.

DerJens

07 March 2018 15:43

Yes the board is fitted with the FPU chip. Is the FPU by default on when you install the card into the Amiga ?

emufan

07 March 2018 16:35

Quote:

Originally Posted by DerJens (Post 1224939)

Yes the board is fitted with the FPU chip.

good news.

Quote:

Is the FPU by default on when you install the card into the Amiga ?

I cannot say for sure. there is a section in the furiatune source code,

if i understand the lines properly, the default state of the fpu is off,
but it might be the other way arround and I'm wrong here - any asm coder here?

Code:

; reset the settings to the default state

default:        moveq        #0,d0

        btst.b        #FURIA_NoFPU,pri

        bne.s        .default2

        moveq        #1,d0

        bra.s        .do_it

.default2        

.do_it        move.b        #$ef,pri        ; unlock

        move.b        #$ff,sec        ; reset secondary register

        move.b        #$ff,pri        ; lock

        tst.l        d0

        beq.s        .default_end

        set_reboot                ; call reboot, when maprom and fpu setting changes

.default_end        rts

I would examine the furiatune options a bit more.
do so and start without startup-sequence, maybe rename
s:startup-sequence to s:startup-sequence-off

try those default / status / shadowrom options.
you may also try to use another kickstart with the maprom option.

maybe it does work somehow different, without any patches and stuff you might have in your startup-sequence.

DerJens

08 March 2018 09:12

When i first installed the Furia card into my Amiga, it was running with Kickstart 3.x (45.064) and an installation of classic workbench 3.1 on an SD card.

I found at work a colleague who has an A600 in his cellar, which should still work. I will try the Furia card with this machine.

emufan

08 March 2018 12:17

ok. did you try - gently without much pressure - to push the FPU in it's socket?
maybe it's some sort of contact problem?

about the maprom option: you may just try to find a rom file on the web:
"kickstart rom 3.1 Amiga 600" something like that,
and use: furiatune maprom kick31_A600.rom

perhaps this does make a diff :)

DerJens

09 March 2018 10:09

I tested the Furia now in another A600 and the FPU is there also not working, so the problem is on the card.

The card is new, so there is no problem to send it back to the seller.

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