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

[Luis Antoniosi (CoCoDemus)]

guess so, P means plastic right ?

On Tue, Feb 26, 2013 at 9:51 AM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

> 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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>
>
>
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>



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