G2F (format pliku)
From Atariki
Format pliku G2F jest przeznaczony dla programu Graph2Font. Autor z lenistwa uprościł go maksymalnie, przez co objętość plików G2F jest dosyć spora, średnio 160 kB. Duża objętość i podatność na kompresję wynika głównie z tego, że jest to zrzut pamięci zarezerwowanej na tablice używane przez G2F. W ostatnich wersjach programu umożliwiona została kompresja plików G2F.
Pliki kompresowane są przy pomocy ogólnie dostępnej biblioteki ZLIB, posiadają wówczas nagłówek G2FZLIB.
G2F file format --------------- length type desc ------ ---- ---- 1 BYTE SCRW Screen Width (32, 40, 48) 1 BYTE bit 0-2 Pixel (1,2,4) bit 3-7 Charset Compress ($80-Normal, $40-Optymizing, $20-Original, $10-JGP, $08-JGP2) 1 BYTE bit 0-6 CHRC Charset Count bit 7 (0=old raster program, 1=new raster program) SCRW*30 BYTE Screen and Invers Data (CHRC+1)*1024 BYTE Charsets Data 30 BYTE bit 0-6 Charsets Table bit 7 newFnt 256 BYTE Bitmap Colors - Background 256 BYTE Bitmap Colors - Color 0 256 BYTE Bitmap Colors - Color 1 256 BYTE Bitmap Colors - Color 2 256 BYTE Bitmap Colors - Color 3 256 BYTE PMG Colors - Player Missile 0 256 BYTE PMG Colors - Player Missile 1 256 BYTE PMG Colors - Player Missile 2 256 BYTE PMG Colors - Player Missile 3 256 WORD PMG_INFO - Player 0 bit 12-15 PMG Priority 256 WORD PMG_INFO - Missile 0 256 WORD PMG_INFO - Player 1 bit 12 - 5th Player (0=disabled, 1=enabled) bit 13 - Multicolor PMG (0=disabled, 1=enabled) 256 WORD PMG_INFO - Missile 1 256 WORD PMG_INFO - Player 2 256 WORD PMG_INFO - Missile 2 256 WORD PMG_INFO - Player 3 256 WORD PMG_INFO - Missile 3 256 BYTE Player0 DATA 256 BYTE Missile0 DATA 256 BYTE Player1 DATA 256 BYTE Missile1 DATA 256 BYTE Player2 DATA 256 BYTE Missile2 DATA 256 BYTE Player3 DATA 256 BYTE Missile3 DATA 1 BYTE unused 240*290 BYTE Sprajt bit 0 - Player0 bit 1 - Missile0 bit 2 - Player1 bit 3 - Missile1 bit 4 - Player2 bit 5 - Missile2 bit 6 - Player3 bit 7 - Missile3 240*290 BYTE SprajtX bit 0 - Player0 bit 1 - Missile0 bit 2 - Player1 bit 3 - Missile1 bit 4 - Player2 bit 5 - Missile2 bit 6 - Player3 bit 7 - Missile3 256 BYTE BUFF [0..255] BUFF [1] bit 0-2 (1=GED+, 2=DLI, 3=GED-) bit 6 (0=DLI, 1=DLI+) bit 7 (0=GED+, 1=GED+ disabled badlines) 240*12*2 WORD RASTER_PROGRAM 30 BYTE Graphics Mode (1,2,4,255) 210 BYTE unused 16 BYTE BUFF [0..15] raster_ofset = BUFF[0]-8 1 BYTE CHARSET LIMITATIONS - LAST CHAR 256 BYTE Lock Colors - Background 256 BYTE Lock Colors - Color 0 256 BYTE Lock Colors - Color 1 256 BYTE Lock Colors - Color 2 256 BYTE Lock Colors - Color 3 1 BYTE unused 1 BYTE Video Chipset [0..2] [0] = 0 - ANTIC+GTIA, 1 - ANTIC+VBXE [1] = color map cell width [2] = color map cell height 48*240 BYTE VBXE Colors Map 1 BYTE CHARSET LIMITATIONS - FIRST CHAR SCRW*30 BYTE Invers2 Data (DLI+) 30 BYTE Table2 Data (DLI+) 128 BYTE Charset limitations 240 WORD RASTER_PROGRAM (line offset) 1 BYTE unused (1) PMG_INFO -------- bit 0-6 Horizontal Position bit7 (0-enabled PMG, 1-disabled PMG) bit 8-11 PMG Size RASTER_PROGRAM -------------- bit 0-7 Code: $00-NOP (0,2,3,4..36 cycle) $01-LDA#, $02-LDX#, $03-LDY# (2 cycle) $41-LDA0, $42-LDX0, $43-LDY0 (3 cycle) $61-LDA, $62-LDX, $63-LDY (4 cycle) $81-STA, $82-STX, $83-STY) (4 cycle) bit 8-15 Value (0..255)
