nesdev.org

here is what i use: ; somewhere in ram resultlo: .db 0 multiplier: .db 0 multiplicand: .db 0 ; somwhere in code lda #0 sta resultlo ldx #8 Loop: lsr multiplier bcc NoAdd clc adc multiplicand NoAdd: ror A ror resultlo dex bne Loop the high byte of the result will be in the accumulator and low byte wi...

I have fond memories of ninja gaiden, but a challenging boss would be dracula in castlevania. Actually that game was just all around dificult after you got passed the first couple of levels, though it has been years. I thought the enemies in Zelda 2 were annoying, especially the iron knuckles, thoug...

you would have to draw a font in chr and set the sprite tile number equal to the tile number of the character you want to display. then position it on the screen where you want it.

1. &H56 is an Integer (2 bytes)
2. &H56& is a Long (4 bytes)

without more understanding of 6502 assembly the explanations that would be given would be very deteailed (in order to fill in what you dont know). these examples would only teach you how to do that one thing. with more understanding we could teach you an idea with some code involved and a shorter ex...

if you have the jre installed on your computer i might be able to offer you a different solution

the sources question was me, i found some on the main nesdev site so i took it off as not to have a useless post

try running it without dosbox use the command prompt

have you tried running it from the command line because i dont remember having a problem with it in win xp

here is the problem:
both must be in zero page for indirect,y addressing:
and, from my understanding inc addrHI would keep incrementing $20 to $21 if placed in rom

first look at an equilvalent decimal example: 345 (3 * 100) + (4 *10) + (5) = 345 now $400 is a hexidecimal number: (4 * $100) + (0 * $10) + ($0) = $400 convert the hex to decmials: (4 * 256) + (0 * 16) + (0) = 1024 therefore $400 = 1024 a good starting place for 6502 assembly would to read "pr...

google "65816info.txt"

Let say i wanted to use Nametable 3 (2c00-2fbf) as and example. Do i always have to start from 2c00. Let say i wanted to start from 2c10. no but remember that the tiles drawn to the screen wont start in the top left corner, but wherever on the screen the memory location you chose represents Can i d...

has any one else heard "regular nintendo" to refer to the nes as opposed to "super nintendo" to refer to the snes

Except weird ol' nesasm.

figured it was what he was using