From be2414f5b11b182998fca7e87712ff0502c8ee93 Mon Sep 17 00:00:00 2001 From: Miquel Sabaté Solà Date: Wed, 27 Sep 2023 09:49:50 +0200 Subject: Add a sprite example MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This is way better documented. Moreover, the `input.s` example has been further simplified. Signed-off-by: Miquel Sabaté Solà --- examples/wrapper.s | 90 ------------------------------------------------------ 1 file changed, 90 deletions(-) delete mode 100644 examples/wrapper.s (limited to 'examples/wrapper.s') diff --git a/examples/wrapper.s b/examples/wrapper.s deleted file mode 100644 index 673c697..0000000 --- a/examples/wrapper.s +++ /dev/null @@ -1,90 +0,0 @@ -;;; -;; This is an empty wrapper for the NES. It does some basic hardware -;; initialization and finally calls a `Main` subroutine that is to be provided -;; by another file. After that, it loops indefinitely. -;; -;; There are some variations of this file already, I just took it from -;; NESHacker: https://github.com/NesHacker (definitely check his Youtube -;; channel, it's extra-dope!); originally licensed under the MIT License. -;;; - -.import Main - -.segment "HEADER" - .byte $4E, $45, $53, $1A ; iNES header identifier - .byte 2 ; 2x 16KB PRG-ROM Banks - .byte 1 ; 1x 8KB CHR-ROM - .byte $01, $00 ; mapper 0, vertical mirroring - -.segment "VECTORS" - .addr nmi - .addr reset - .addr 0 - -.segment "STARTUP" - -.segment "CHARS" - -.segment "CODE" - -.proc nmi - bit $2002 - lda #0 - sta $2006 - sta $2006 - rti -.endproc - -.proc ResetPalettes - bit $2002 - lda #$3f - sta $2006 - lda #$00 - sta $2006 - lda #$0F - ldx #$20 -@paletteLoadLoop: - sta $2007 - dex - bne @paletteLoadLoop - rts -.endproc - -.proc reset - sei - cld - ldx #%01000000 - stx $4017 - ldx #$ff - txs - ldx #0 - stx $2000 - stx $2001 - stx $4010 - bit $2002 -@vblankWait1: - bit $2002 - bpl @vblankWait1 -@clearMemory: - lda #$00 - sta $0000, x - sta $0100, x - sta $0200, x - sta $0300, x - sta $0400, x - sta $0500, x - sta $0600, x - sta $0700, x - inx - bne @clearMemory -@vblankWait2: - bit $2002 - bpl @vblankWait2 - jsr ResetPalettes -main: - jsr Main - lda #%00001000 - sta $2001 -endlessLoop: - jmp endlessLoop -.endproc -- cgit v1.2.3