Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!cbmehq!cbmdeo!adspdk!hclausen
From: hclausen@adspdk.UUCP (Henrik Clausen)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: 68000 Multitasking
Message-ID: <18634495.ARN12e7@adspdk.UUCP>
Date: 19 Dec 90 14:13:25 GMT
References: <44872@cci632.UUCP>
Reply-To: hclausen@adspdk.UUCP
Followup-To: comp.sys.amiga.hardware
Organization: Graffiti Data
Lines: 38

In article <44872@cci632.UUCP>, David Greenberg writes:

> Hi,
> 	I am using JRCOMM to download to ram: and everything works fine 
> unless I try to multi-task...It seems like the 68000 isn't fast enough to keep 
> up with the download (2400 baud).

   The 68000 is plenty fast enough for that - read on. Properly installed,
a 14.400 HST modem driven at 19.200 bps runs just fine.

> could be a drive problem ....even though I d/l to RAM, When I dir, 
> it accesses my HD (Kronos - seagate st296N)........any ideas???

   You probably have the Kronos turn off interrupts (Disable()) while doing
it's transfers. This is a dead nasty trick to squeeze marginally better
performance out of a non-DMA controller, and I've been figthing how to set
the Kronos to do things right. The installation SW is the most tricky I've
ever seen.

   It defaults to Disable interrupts, thus killing the interrupt driven
serial.device!!!

   In your configuration files, there will be two places where you specify
the interrupt status with a DisableIRQ keyword or similar. Modify BOTH of
these to NoDisableIRQ, and run the SetAutoBoot program. This should do it,
but I'm speaking out of memory, and it's been a year since I worked with
these controllers.

   Apart from this, the Kronos is a nice controller and will do you good
service for a long time to come.

>                                                      Dave

                                                           -Henrik
______________________________________________________________________________
| Henrik Clausen, Graffiti Data | If the Doors of Perception where cleansed, |
| ...{pyramid|rutgers}!cbmvax!  | Man would see Reality as it is - Infinite. |
\______cbmehq!adspdk!hclausen___|_________________________________W. Blake___/