[Coco] Coco 2b problem: reboots when accessing the disk

[Luis Antoniosi (CoCoDemus)]

Jameco has 68B09E and not 68B09EP. Is this a fit ?

https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_320590_-1



On Tue, Feb 26, 2013 at 8:45 AM, Mark Marlette <mmarlette at frontiernet.net>wrote:

> Luis,
>
> Yes, replace 68b09ep, add machine(augat) style socket. CC2 no benefit to a
> 63x09ep.
>
> Regards,
>
> Mark
> http://www.cloud9tech.com
>
>
> From: Luis Antoniosi (CoCoDemus) <retrocanada76 at gmail.com>
> To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> Sent: Tuesday, February 26, 2013 6:15 AM
> Subject: Re: [Coco] Coco 2b problem: reboots when accessing the disk
>
> both tests fail. computer clicks and after some time the screen is gone.
>
> so, do i need to replace the 6809 ? for a coco2b is pointless going for a
> 6309 right ?
>
> On Tue, Feb 26, 2013 at 1:13 AM, Darren A <mechacoco at gmail.com> wrote:
>
> > On Mon, Feb 25, 2013 at 10:15 PM, Luis Antoniosi (CoCoDemus) wrote:
> > > Hi,
> > >
> > > I have this coco2b and when doing a DIR  with a FD500 it reboots with
> > > garbled screen. If the drive is not connected it returns I/O Error.
> > >
> >
> > That sounds like either the CPU's HALT or NMI lines are blown.  With
> > the floppy controller connected, you can enter this one-liner to test
> > HALT:
> >
> > POKE &HFF48,3:POKE &HFF40,128
> >
> > If HALT is working correctly, the computer should freeze for about 8
> > seconds and then the OK prompt will return.
> >
> > To test both HALT and NMI together, you can use the following program:
> >
> > 10 POKE &H600,&H7C
> > 20 POKE &H601,4
> > 30 POKE &H602,0
> > 40 POKE &H603,&H3B
> > 50 POKE &H109,&H7E
> > 60 POKE &H10A,6
> > 70 POKE &H10B,0
> > 80 POKE &HFF48,0
> > 90 POKE &HFF40,&HA0
> > 100 GOTO 80
> >
> > When you run this program the character in the top-left corner of the
> > screen (standard 32 column mode) should increment once every 1.5
> > seconds.  Again, a floppy controller is required for this test.
> >
> > Darren
> >
> > --
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> >
>
>
>
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