furrtek

Konami 4bpp sprite tile format

16-bit graphics ROMs go in pairs
One 32-bit word describes a row of eight 4bpp pixels
Each byte is a bitplane

ROM      UUUUUUUUUUUUUUUULLLLLLLLLLLLLLLL
Bit      3322222222221111111111
         10987654321098765432109876543210
Pixel    01234567012345670123456701234567 (0=left)

furrtek

# NGP Horoscope simulator v1.1
# furrtek 2021
# Based on algorithm found in ngp_bios.bin

import sys
from datetime import datetime

if len(sys.argv) == 1:
	print(sys.argv[0] + " DD/MM/YYYY")
	exit()

furrtek

; YUVDUMP - furrtek 2020
; With help from David Shadoff and Chris Covell

; Reads the RGB to YUV lookup ROM in the HuC6260
; Ugly code is ulgy, I was a Z80 kid :(

; How to use:
; -Wire HuC6260 pin 58 to ground
; -Run this program from a flash cart
; -Press UP, wait for the screen to fill up