DKB RapidFire SCSI problem
 

My A2000 has a DKB Rapidfire SCSI controller installed. As a controller, it works fine. However, when I populate it with RAM, the system won't boot. I have two 4 meg, 72 pin SIMMS in it, and the jumpers are set as follows:

J2 - OFF
J1 - OFF
J0 - ON

Other cards in the system are:
GVP Spectrum 24/28
GVP IO Extender
PP&S 2000/040 with 16 megs of RAM - RomTagMem used to configure it instead of allowing it to use its autoconfigure/fragmented memory structure.
DKB MegaMini 2MB chip RAM add on.

System is KS 3.1

Any ideas as to how to get it working?

I have no experience with this card, but I would start by trying with only one SIMM and the appropriate jumper configuration.

You are probably going over the Z-II addressing limit with the Spectrum. As Talybont said try with just 4MB.

Yeah, GVP Spectrum 24/28 takes 2M of Z2 space which leaves 6M remaining but because boards need to be aligned, there is only space for single 4M board (4M and another 2M board would also work, only if 2M board comes first)

Remove Spectrum to confirm it.

btw, could you dump the Rapidfire boot ROM? (For some reason I forgot to include it in my wanted list) Interestingly it is flash chip so update may be included with some later install disk?. Dumping can be done using software.

I believe I tried that (just one simm, jumpered for just 4 megs), but, I will try again.

What program should I use to dump it?

Same result. Grey screen, power led flashing slowly. No boot.

Perhaps there is some other conflict, include output from WB disk tools/showconfig.

Include output from this program: http://www.winuae.net/files/b/expdump.zip , thanks. (First run it without parameters to confirm it outputs something, then redirect the output to a file, for example expdump >ram:output.txt)

(This is only part 1, second part is actual dumping but it needs information from expdump output)

I have a Rapidfire too and I ran expdump, the Rapidfire shows up as address EA0000 size 00020000, but I don't know what to do next, there's no doc in the file. The later install disks for this should have had the FlashROM upgrade on it too. My ROM version/dkbscsi.device is 1.3.

It looks normal. Spectrum is located where it should be and all RAM is outside of Z2 space.

I guess next step is to try it without any other expansion, including 68040. (16-bit RAM would be really slow with accelerators anyway..)

Thanks. This program only dumps all autoconfig info (nearly same as showconfig debug)

Ok.. so initdiagvec is at the beginning of the IO space so ROM space is most likely first 64k with only even bytes in use (from ea0000 to eaffff, remaining 64k probably is IO space)

Use any monitor program to save the image, for example mon165.lha from aminet ("] ea0000 10000 <path to file>")

If you have any install disks, would you be able to create ADF files and upload them?

You can also find install disks here:

http://amiga.resource.cx/exp/rapidfire

Yep I know about those, just wondering/hoping that a later version exists (there's no flash update on the amiga.resource.cx ones).

After spending too long looking for this on old HDDs I found it. This should be the 1.3 version of dkbscsi.device with the flash updater. It's in DMS format, zipped.
Uploaded attachment again, must have run out of space at some point. dkbv31scsiup.zip

Thanks. There is no need to do the manual dump anymore if your board has same flash update installed.

Do you have any compatible SIMMs? I'd like to know board's Z2 RAM autoconfig product id. (EDIT: found, it is product 1)

(Emulation done, it is almost same as DKB accelerator board SCSI controllers)

EDIT: OP: does it work if it is jumpered to 0M but SIMM is installed? Try also lower size jumper setting than installed SIMM size and finally try single SIMM in another slot (perhaps one of them is broken).

It does work if it is jumpered to 0 megs with SIMMS in the slots. I have tried the lower size jumper settings, too, as well as a single SIMM in a socket. I think the board will only let you have a single SIMM in bank A. At least that's what the manual leads me to believe.

https://uploads.tapatalk-cdn.com/201...60ec8fc628.jpg

https://uploads.tapatalk-cdn.com/201...b62012e307.jpg

Thea are the SIMMS I have tried on it. Do they seem to be the right type? Sold as FPM, 60ns.

They seem to be EDO chips, TI calls them "enhanced page mode" in the datasheet, but the description is the same as for EDO. :-)

kirk_m and grelbfarlk: I think a dump of your board's ROM could still be useful. For preservation purposes in case the ROM version differs from the v1.31 flash update file. Since the ROM chip size is 32KB (compared to ~11KB for the flash update), maybe it contains other info like a serial number etc.?

Not compatible, then, I guess? I thought EDO was backwards compatible with FPM, but, my memory of this stuff is really shaky.