Absolute stores to ROM-- how do they effect emulators and the Cuttle Cart?

[+Propane13]

Hey, question.

 

Is the Cuttle Cart (and potentially Cuttle Cart 2) putting items into Battery-backed RAM?

I have an idea for something, that I Wanted to check out its feasibility.

 

Let's say I have a byte at ORG $F100.

It is $02. Let's say that it's the number of lives a player has.

On powerup, I have an idea. I have this code:

 

LDA #$03

STA $F100

 

So, the questions in my mind are what happens in these situations?

1) Real hardware-- can this hurt the hardware, or will it do nothing?

2) Emulators-- will this update the value?

3) Cuttle Cart (and cuttle cart 2)-- will this update the value?

 

Curious as to if you get different results for each environment.

 

-John

[+batari]

Hey, question.

 

Is the Cuttle Cart (and potentially Cuttle Cart 2) putting items into Battery-backed RAM?

I have an idea for something, that I Wanted to check out its feasibility.

 

Let's say I have a byte at ORG $F100.

It is $02. Let's say that it's the number of lives a player has.

On powerup, I have an idea. I have this code:

 

LDA #$03

STA $F100

 

So, the questions in my mind are what happens in these situations?

1) Real hardware-- can this hurt the hardware, or will it do nothing?

It will cause bus contention for a fraction of a cycle, but will probably not damage anything (there are a number of games that STA $FFFx to bankswitch, and they don't seem to harm anything.)

2) Emulators-- will this update the value?

Probably not.

3) Cuttle Cart (and cuttle cart 2)-- will this update the value?

No on the CC, as there is no R/W line on the console. As for the CC2, it does have a R/W line, so I'm not sure. Maybe someone wants to try?