Nes Template - Dasm help.

[Happy_Dude]

O.k I'm hoping this is a simple little DASM problem and not a great big NES problem

I need to include a binary file in a new bank.

The source code I have isn't any help because it's written in NESASM

 

It has to go at $0000 but the rom starts at $bff0.

So how do I do this ? Do I need to use RORG ? If so how ?

 

This is how it's done in NESASM

.bank2

org $0000

.incbin "test.chr"

 

any help

[EricBall]

Although it should be possible to accomplish what you want to do with DASM, you will probably be better off using the same 6502 assembler that other NES homebrewers use.

 

The .bank etc commands are used by the assembler to handle the NES mapper (bankswitching) and iNES file format.

[Wrathchild]

Also have a look at CC65, its assembler and linker have been used to make NES images.

nes101.zip

[Paul Slocum]

org $0000

rorg $bff0

 

There is an include binary directive, can't remember the syntax. Read the manual.

 

-paul

[Happy_Dude]

I figured it out

I just have to put the CHR at org $10000 just after the vectors.

Nothing tricky at all.

 

Heres why I couldn't figure it out.

The macro I was using to setup the PPU was broken so the screen never got turned on

;This is broken :(

   MAC SetPPUCtrl

   ldx #>{1}          ;High byte of address 

   sta PPUCtrl0 

   ldx #<{1}          ;Low byte of address           

   sta PPUCtrl1

   ENDM

For some reason this Macro breaks the code whereas SetPPUAddr

works fine and its essentialy the same thing

[Happy_Dude]

It only took me a week to figure out I'm loading X and storing A

And I want to code a game? Could take a few years at that rate