[Coco] Drivewire 3 issues

[Roger Taylor]

At 12:04 PM 4/2/2009, you wrote:
>Hi all,
>
>I just got Drivewire 3 burnt onto an EPROM and put it in a ROM Pak. 
>It is a great product and a marvelous gift to the CoCo community. 
>Thanks Cloud-9!

You have the Auto-Start jumper set for your controller or ROM 
Pak.  Oddly enough, Disk BASIC still boots this way but it overrides 
the CoCo 3 stuff.

Also, CoCo 3 users trying to patch their Disk BASIC ROM while it's in 
RAM and saving out the image to burn to an EPROM should know that the 
ROM won't run right on a CoCo 1 or 2.  The correct way to patch the 
Disk BASIC "2.1" ROM is to run an All-RAM routine first that recopies 
the original BASIC, ECB, and Disk BASIC ROMs into RAM, perform the 
patches, then save the images.  Depending on the situation and the 
ROMs in use, this might not work sometimes....

A cure I came up with is a new feature in CCASM that lets you write 
DOS patch programs that are merged with an existing ROM image file to 
create a ready-to-burn ROM.  For example, a typical CoCo 3 DOS 
patcher is a LOADM'able file with multiple ORG statements that jump 
around the DOS ROM/RAM making changes.  CCASM assembles the LOADM 
file then overlays it with a copy of Disk BASIC 1.1.  The resulting 
ROM is naturally compatible with all CoCos that can use a disk controller.

-- 
Roger Taylor

http://www.wordofthedayonline.com