3 files changed, 57 insertions(+), 10 deletions(-)

M src/cart.asm
M src/head.asm
M src/init.asm

@@ 2,6 2,13 @@
 ;; Cart
 
 	INCLUDE "src/head.asm"
+
+;; include sprites
+
+	.org $8000
+
+Sprites:
+	.incbin "src/sprite.chr"
 	.org $C000
 
 ;; init


@@ 39,7 46,3 @@ __NMI:                         ;
 	.dw __NMI
 	.dw __INIT
 	.dw 0
-
-;; include sprites
-
-	.incbin "src/sprite.chr"

@@ 1,12 1,15 @@
 
 ;; iNES header
 
-	.db "NES", $1a ; identification of the iNES header
-	.db 1 ; number of 16KB PRG-ROM pages
-	.db $01 ; number of 8KB CHR-ROM pages
-	.db $00 ; NROM
-	.dsb $09,$00 ; clear the remaining bytes
-	.fillvalue $FF ; Sets all unused space in rom to value $FF
+	.db "NES",$1A
+	.db $02 ;Size of PRG ROM in 16 KB units
+	.db $00 ;Size of CHR ROM in 8 KB units (Value 0 means the board uses CHR RAM)
+	.db $21 ;Flags 6 (BNROM)
+	.db $20 ;Flags 7 (BNROM)
+	.db $00 ;Size of PRG RAM in 8 KB units (Value 0 infers 8 KB for compatibility)
+	.db $00 ;Flags 9
+	.db $00 ;Flags 10 (unofficial)
+	.db 0,0,0,0,0
 
 ;; constants
 


@@ 116,4 119,5 @@ reqdraw_splash          .dsb 1
 reqdraw_cursor          .dsb 1 
 reqdraw_dialog          .dsb 1 
 reqdraw_name            .dsb 1 
+ptr_src                 .dsb 1 
 	.ende 

@@ 33,6 33,46 @@
 
 ;; Init
 
+Clear_vram_loop:
+	STA PPUDATA
+	STA PPUDATA
+	STA PPUDATA
+	STA PPUDATA
+	STA PPUDATA
+	STA PPUDATA
+	STA PPUDATA
+	STA PPUDATA
+	DEY 
+	BNE Clear_vram_loop
+	DEX 
+	BNE Clear_vram_loop
+	;load sprite base
+
+	LDA #$00
+	STA PPUADDR
+	LDA #$00
+	STA PPUADDR
+
+Load_sprites:
+	LDA #Sprites&255
+	STA ptr_src
+	LDA #Sprites/256
+	STA ptr_src+1
+	LDY #0                       ; starting index into the first page
+	STY PPUMASK                  ; turn off rendering just in case
+	STY PPUADDR                  ; load the destination address into the PPU
+	STY PPUADDR
+	LDX #32                      ; number of 256-byte pages to copy
+
+Loop:
+	LDA (ptr_src),y              ; copy one byte
+	STA PPUDATA
+	INY 
+	BNE Loop                     ; repeat until we finish the page
+	INC ptr_src+1                ; go to the next page
+	DEX 
+	BNE Loop                     ; repeat until we've copied enough pages
+
 loadPalette:                   ; [skip]
 	BIT PPUSTATUS
 	LDA #$3F