[Coco] Superboard discussion: Serial EEPROM

[Bob]

Okay, I haven't added much to it, but just wanted to put this initial map out
there to get some feedback.

[8 bytes - VROM 1 label]
[8 bytes - VROM 2 label]
[8 bytes - VROM 3 label]
[8 bytes - VROM 4 label]
[8 bytes - VROM 5 label]
[8 bytes - VROM 6 label]
[8 bytes - VROM 7 label]
[8 bytes - VROM 8 label]
[1 byte  - VROM default select]
[1 byte  - startup preferences  stjjccmm]
   bit 7    s  = speed        0=low 1=hi
   bit 6    t  = hires type   0=Tandy 1=CoCoMax3*
   bits 4-5 jj = joystk pref  0=ask 1=L 2=R 3=hires*
   bits 2-3 dd = column pref  0=32 1=40 2=80
   bits 0-1 mm = monitor      0=ask 1=cmp 2=rgb (3=mono?)
[190 bytes free in RSDOS section]
[256 bytes reserved for NitrOS9]

* hires joystick driver up to user/software.


Bob


--- "Boisy G. Pitre" <boisy at boisypitre.com> wrote:
> 
> On Apr 24, 2004, at 1:36 AM, Bob wrote:
> 
> > I'd like to know if there are any "standards" in mind for this:
> > "Serial EEPROM: 512 bytes of serial EEPROM..."
> 
> There is a preliminary break-down of the storage contents of the Serial 
> EEPROM in the SuperBoard.  I had a preliminary sketch of how this would 
> look in my mind... essentially the first 256 bytes are devoted to Disk 
> BASIC and the second 256 bytes are devoted to NitrOS-9.
> 
> Some of the information in the first 256 bytes is taken up by the VROM 
> feature of the SuperBoard.  Specifically, there are eight 8 byte label 
> areas for a total of 64 bytes.  These are used to label the 8 banks of 
> VROM.  Another byte holds the default VROM to startup in.  Yet another 
> byte holds bits about the state of startup (hi speed mode, etc.).
> 
> The plan is to keep some of the space open for "user-defined" use.




	
		
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