[Coco] Resurrecting a CoCo (26-3001) with a 26-3029 FDC.

[Arthur Flexser]

Your problem is that Disk Basic requires Extended Basic and will not boot up
without it.  Perhaps someone here could burn you an EPROM of the Extended Basic
chip, though the compatible 68766 EPROM is hard to come by nowadays.  Or perhaps
someone has a dead or surplus CoCo that the Ext. Basic chip could be scavenged
from.

Art

On Sun, 24 Aug 2008, Ryan Pritchard wrote:

> Hello out there,
> 
> Newby to CoCoList and to running a CoCo, but not OS-9 which I am  
> looking forward to running the NitrOS-9 flavour.
> 
> Fourth attempt to post but this time it should work thanks to Dennis  
> telling me some information about the mailing list server.
> 
> 
> I have recently got the bug to play with a CoCo I had acquired years  
> ago.  The good news for me, is the 26-3001 model I have is the  
> Revision E mother board which has all the jumpers on it to go all the  
> way up to 32K (and likely 64K since I know the 64K x 1 chips I have  
> are all good as they are coming from an Apple 80 Column card.
> 
> Currently the CoCo has 16K in it, and boots up to Color Basic 1.1.  It  
> has an empty ROM socket where if I have understood correctly I could  
> install and Extended Basic ROM if I had one.
> 
> I am having a problem getting the Disk Basic on the 26-3029 FDC to  
> boot, and thus cannot format or other wise do anything disk related.   
> Is there any common issues with the FDC that I should look at to  
> determine why the CoCo is not detecting the cartridge and booting from  
> the FDC ROM?  The PCB for the FDC has the markings LEIA MV-1 38 84,  
> and has the WD-1773-PH controller chip.  The markings on the ROM are  
> TMS4764-30NL, B8428L, ZA64342, 804-5364A.
> 
> It does not appear visually to have any burnt caps, resistors, or  
> chips, though I have not tested any of them.  Also I have tried the  
> time tested eraser on the contacts to see if that would resolve the  
> problem, though I have not fully inspected the slot on the CoCo.
> 
> Like many people before me, playing with a CoCo for the first time in  
> their lives, help would sure be appreciated.
> 
> Regards,
> 
> Ryan Pritchard
> Fun Extends All Basic Life Expectancies
> 
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
>