xref: /freebsd/contrib/file/magic/Magdir/pc98 (revision 5dae51da3da0cc94d17bd67b308fad304ebec7e0)
1#------------------------------------------------------------------------------
2# pc98:  file(1) magic for the MSX Home Computer
3# v1.0
4# Fabio R. Schmidlin <sd-snatcher@users.sourceforge.net>
5
6# Maki-chan v1 Graphic format
7# The image resolution should be X=(44.L - 40.L) and Y=(46.L - 42.L), but I couldn't find a way to do so
8# http://www.jisyo.com/viewer/faq/maki_tech.htm
90	string/b		MAKI01 	Maki-chan v1.
10>6	ubyte|0x20	x		\b%c image
11>8	ubelong		>0x40404040	\b, system ID:
12>>8	byte		x		%c
13>>9	byte		x		\b%c
14>>10	byte		x		\b%c
15>>11	byte		x		\b%c
16>44	ubeshort	x		\b, %dx
17>46	ubeshort	x		\b%d
18>38	ubeshort&2	0		\b, 16 paletted RGB colors
19>38	ubeshort&2	2		\b, 8 fixed RGB colors
20>38	ubeshort&1	1		\b, 2:1 dot aspect ratio
21
22# Maki-chan v2 Graphic format
23# http://www.jisyo.com/viewer/faq/mag_tech.htm
24# http://mooncore.eu/bunny/txt/makichan.htm
25# http://metanest.jp/mag/mag.xhtml
260	string/b		MAKI02\ \ 	Maki-chan v2 image,
27>8	byte		x		system ID: %c
28>9	byte		x		\b%c
29>10	byte		x		\b%c
30>11	byte		x		\b%c,
31>13	search/0x200	\x1A
32#Maki-chan video modes are a bit messy and seems to have been expanded over the years without too much planing:
33#1) When offset1(ubeshort) !=0x0344:
34# 1.1) And  offset3(ubyte).b7=0:
35# - b0=pixel aspect ratio: 1=2:1   (note: this ignores that the machine's 1:1 pixel aspect ratio isn't really 1:1)
36# - b1=number of colors: 0=16 colors, 1=8 colors
37# - b2=Palette or fixed colors flag (called "analog" and "digital" in the doc): 0=Paletted, 1=Fixed colors encoded directly in the pixel data
38# 1.2) And  offset3(ubyte).B7=1:
39# - b0=256 paletted colors
40# - b1=256 fixed colors using the MSX SCR8 palette
41#2) When offset1(ubeshort) =0x0344:
42# - 256x212 image with 19268 YJK colors. The usual resolution and color information fields from the file must be ignored
43>>&1	ubeshort	0x0344		256x212, 19268 fixed YJK colors
44>>&1	ubeshort	!0x0344
45>>>&5	uleshort+1	x		%dx
46>>>&7	uleshort+1	x		\b%d,
47>>>&0	ubyte&0x86	0x00		16 paletted RGB colors
48>>>&0	ubyte&0x86	0x02		8 paletted RGB colors
49>>>&0	ubyte&0x86	0x04		16 fixed RGB colors
50>>>&0	ubyte&0x86	0x06		8 fixed RGB colors
51>>>&0	ubyte&0x81	0x80		256 paletted RGB colors
52>>>&0	ubyte&0x81	0x81		256 fixed MSX-SCR8 colors
53>>>&0	ubyte&0x01	1		\b, 2:1 dot aspect ratio
54
55# XLD4 (Q4) picture
5611	string/b	MAJYO		XLD4(Q4) picture
57
58# Yanagisawa Pi picture
59#0	string		Pi\x1A\0	Yanagisawa Pi picture
60#>3	search/0x200	\x04
610	string		Pi
62>2	search/0x200	\x1A
63>>&0	ubyte		0
64>>>&3	ubyte		4		Yanagisawa Pi 16 color picture,
65>>>&4	byte		x		system ID: %c
66>>>&5	byte		x		\b%c
67>>>&6	byte		x		\b%c
68>>>&7	byte		x		\b%c,
69>>>&10	ubeshort	x		%dx
70>>>&12	ubeshort	x		\b%d
71>>>&3	ubyte		8		Yanagisawa Pi 256 color picture
72>>>&4	byte		x		system ID: %c
73>>>&5	byte		x		\b%c
74>>>&6	byte		x		\b%c
75>>>&7	byte		x		\b%c,
76>>>&10	ubeshort	x		%dx
77>>>&12	ubeshort	x		\b%d
78