[Coco] GIME behavior

[Mark Marlette]

Darren,

Working tons of hours at work and then C-9. I'm buried in  hardware right now.

Lucky, no way.....Luck and magic, not here, designed, engineered. Boisy is the software guy. There is a method to this as I recall but has at least been a year if not more since I looked at this. I will have to go look at my notes from my test code. Not going to happen for at least another ~20hrs when playtime comes around again.....

This a REALLY important address for the games we play at C-9 with the hardware.

So if you can't mode change then you might want to explain a bit more on your project as I don't quite follow the design. If this is going to be a product and you don't want to be detailed. I understand as I hope you will as well.

Need to run, late for my pick up right now.....

Mark
Cloud-9


----- Original Message -----
From: "Darren A" <mechacoco at gmail.com>
To: "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Sent: Wednesday, April 13, 2011 7:18:42 PM
Subject: Re: [Coco] GIME behavior

On 4/13/11, Mark Marlette  wrote:
>
> I am going to disagree with you and clearly change my original position..
>
> Here is a snipet of code from one of our products, not released and this
> works.....
>
>          lda   $FF90	   ; get CoCo 3 INT0 register
>          ldb   MMUReg      ; and MMU bank register
>          pshs  d           ; save for later
>
> To read these registers, I believe you have to be in the correct mode.
>

---

What mode would that be?  And if I have to change $FF90 to get into
that mode, then it would be useless.

I know the MMU bank registers are readable, but I've not been able to
read $FF90.  Under normal ECB operation $FF90 contains $CC but no
method I've tried will return that.

Are you sure you haven't just been lucky with your code thus far?

Darren

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