🚀 go-pugleaf

In article <4crdvn$fhr@multimaster.buslogic.com>
           techsup@buslogic.com "Jo Kellner" writes:

> David Longley <David@longley.demon.co.uk> wrote:
> 
> >After  many  weeks  of configuring a  small  network,  everything 
> >seemed to be in place until Friday. ** DMA TEST FAIL !! ***
> >
> >System 486DX-100
> >       heatsink+Fan
> >
> >Motherboard PCI Bus Mainboard (48 and a BIG 6 on the manual)
> >
> >The IDE is disabled and I'm running two SCSI hard disks of a  BUS 
> >LOGIC  BT545S. All was working fine until we tried a new  network 
> >adapter  and  at  one stage of configuring  Windows,  the  SYSTEM 
> >directory was scrambled and we got gobbledegook on the screen.
> >
> >Next, when the system. just before the drives are identified,  we 
> >got the message  ** DMA TEST FAIL !! ***
> >
> >Pulling  the network card and trying again, the system seemed  to 
> >work fine till now. Now I can;t get rid of the message at all.
> >
> >I have tried swapping the SCSI card for another, a Future  Domain 
> >16 bit card and with that card the system just stops at the  SCSI 
> >ROM signature. The BUS LOGIC card works fine on another system.
> >
> >Question 1 - where is this message coming from?
> >
> >             a) CPU
> >             b) Motherboard
> >
> >What can I do about it?
> 
> It's a motherboard message, most likely.  Make sure the card is firmly 
> seated in the VLB slot, and that bus-mastering is enabled for that slot.
> 
> Remove the network card until you get the system up and running again, 
> and then make sure that the two cards are not trying to use the same 
> resources - IRQ, I/O address, etc.
> 
> Jo Kellner
> BusLogic Technical Support
> (408) 654-0760
> 
> 
Please note: The motherboard is a 3 PCI and 4 ISA slot board.

a. The Buslogic SCSI-2 card is in the second ISA slot (not a VLB)
b.  If  I put an IDE hard disk in the system, after the  

                     !!!  DMA TEST FAIL !!!

The drive boots (bit I see no SCSI devices of course).

c.  At  this  point  tye ONLY cards in the  system  are  the  Oak 
Technology VGA (256K) card and the BUS LOGIC BT545S card.

d. If I run PC TOOLS SI or Checkit. the motherboard passes as doe 
sthe CPU. The DMA controller passes both.


One  other oddityt is that the characters go blue sometimes,  but 
not  all  the screen. Although there is no CD ROM on  the  system 
now, this line triggers the colour change:

C:\SBPRO\SBP-SET /M:12 /VOC:12 /CD:12 /FM:12 /LINE:12

I'm  very  worried  about the DMA failure  and  no  SCSI  devices 
appearing. I have tried clearing CMOS, that makes no difference.

What should I do?
-- 
David Longley