Amiga.org

Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: mingle on October 27, 2005, 02:56:25 PM

Title: A4091 RAM chips - will these work?
Post by: mingle on October 27, 2005, 02:56:25 PM

Hi All,

I've just picked up an A2000HD (rev 6 MB, WB2.0) which has an A4091 HD/SCSI card in it, but it has no RAM fitting, only lots of empty sockets.

What I'd like to know is what type of memory chips do I need to put in and will these chips I already have fit the bill (labelled as follows):

"OKI Japan 989Z
M511000A-80R
90385507"

Cheers,

Mike.

Title: Re: A4091 RAM chips - will these work?
Post by: Zac67 on October 27, 2005, 09:51:10 PM

An A4091 in a 2k??  :-o
Thought it's Z III only...

Title: Re: A4091 RAM chips - will these work?
Post by: adolescent on October 28, 2005, 12:46:23 AM

Yes, A4091 is Zorro3 only (and has no RAM slots).  Probably meant 2091.

Title: Re: A4091 RAM chips - will these work?
Post by: melott on October 28, 2005, 03:12:53 AM

Quote

mingle wrote:
Hi All,

I've just picked up an A2000HD (rev 6 MB, WB2.0) which has an A4091 HD/SCSI card in it, but it has no RAM fitting, only lots of empty sockets.

What I'd like to know is what type of memory chips do I need to put in and will these chips I already have fit the bill (labelled as follows):

"OKI Japan 989Z
M511000A-80R
90385507"

Cheers,

Mike.

I didn't Google your chip numbers to see what exactly
they are....(if they were cheap, then they're probably
not the right chips ;-) )
But the A2091 takes 256x4  44256 Dip chips.
I did some searching for these chips awhile back and
found them to be quite expensive.
Not worth the price for me anyway.
You can find a ram card with several megs of ram install
for less than you would pay for the couple megs of chips
for the A2091 card.

Title: Re: A4091 RAM chips - will these work?
Post by: Jeff on October 28, 2005, 03:24:21 AM

Not to mention that the 2091/Ram expansion isn't the most reliable combination in my opinion:-).

Title: Re: A4091 RAM chips - will these work?
Post by: Zac67 on October 28, 2005, 07:21:43 AM

2091? OK, the 4x256 (514256 and similar) can be found on many old ISA VGA cards to salvage from. ;-) You need sets of four to add 512 KB.

Title: Re: A4091 RAM chips - will these work?
Post by: orange on October 28, 2005, 07:27:42 AM

Vesalia has them and they are a bit pricey. OTOH, I have heard that they speed up HDD transfers.

Title: Re: A4091 RAM chips - will these work?
Post by: mingle on October 29, 2005, 03:11:40 PM

Dear All,

Thanks for your suggestions and comments...

I know what I'm looking for now!

Cheers,

Mike.