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|
{+ all global variables concerning CPU,Graphic and the other +
+ stuff are stored in this unit +}
unit vars;
{$MODE Delphi}
interface
type
TCPUCallback = procedure of object;
const
thr_f: integer = 1;
cart: pointer = nil; // Cartridge
isddraw: boolean = True; // DirectDraw;
var
FDCallback, FCCallback, F4Callback: TCPUCallback;
WritingVGM: Boolean = False;
bdrop, dirname, dirload: string;
romname, speicher: string[128];
buffer: array[0..1023] of char;
th: integer;
dw, dh, tid: DWORD;
// Graphics
dx_buffer: array[0..(160 * 160 * 4 * 10) - 1] of byte;
const
dx_bits: DWORD = 0;
dx_r: DWORD = 0;
dx_g: DWORD = 0;
dx_b: DWORD = 0;
dx_sr: DWORD = 0;
dx_sg: DWORD = 0;
dx_sb: DWORD = 0;
dx_pitch: longint = 0;
cmov: DWORD = 0;
vbi_latency = 44;
di_fix: integer = 0;
ei_fix: integer = 0;
n_ram: dword = 0;
mbc1_type: dword = 0;
gb_mode: byte = 0;
stop_mode: byte = 0;
halt_mode: byte = 0;
// Keyboard :
k_down: byte = 1;
k_up: byte = 1;
k_left: byte = 1;
k_right: byte = 1;
k_start: byte = 1;
k_select: byte = 1;
k_a: byte = 1;
k_b: byte = 1;
code: word = 0;
cur_c: word = 0;
mode: DWORD = 0;
vbi_count: integer = 0;
ROM = 1;
MBC1 = 2;
MBC2 = 3;
MBC3 = 4;
MBC5 = 5;
full_cycles = 70224;
CGB = 1;
DMG = 0;
f_stopped: boolean = False;
colors: array[0..3] of word = ($7fff, $4210, $2108, 0); // GBColor
// Speed functions, the timervar is increased each 60Hz
lastTime: DWord = 0;
perfFreq: DWord = 0;
type
pair = record
case boolean of
False: (l, h: byte);
True: (W: word);
end;
quadruple = record
case byte of
0: (b1, b2, b3, b4: byte);
1: (w1, w2: word);
2: (q: longint);
end;
var
gbr_ime: boolean;
sp_, pc, pc_old: pair;
af, bc, de, hl: pair;
m_iram, m_iram2: array[0..65535] of byte;
m_ram: array[0..40000 - 1] of byte;
memc: integer;
cycles: word;
machine_cycles: longint;
spriten, n_ff04: DWord;
cnumber: byte;
c_count, t_count: DWord;
addr_bank, rom_priv: DWord;
cart_type, srom, sram: word;
old_mode, nr_t, vbioff_count: Dword;
sio_count: byte;
m_cgbram: array[0..32767] of byte;
palramb, palramo: array[0..16383] of byte;
hdma: DWord;
gb_speed: byte;
hdma_count, make_line_count, make_line_ccount: integer;
adr_s, adr_p: Dword;
line_b, line_b_mask, window_b, window_b_mask: array[0..15120 * 4 - 1] of byte;
pix: array[0..65535, 0..7, 0..1] of byte;
cartsize: Dword;
const
c_tab: array[0..461, 0..1] of byte =
(
(2, 0), (3, 0), (0, 0),
(2, 1), (3, 1), (0, 1),
(2, 2), (3, 2), (0, 2),
(2, 3), (3, 3), (0, 3),
(2, 4), (3, 4), (0, 4),
(2, 5), (3, 5), (0, 5),
(2, 6), (3, 6), (0, 6),
(2, 7), (3, 7), (0, 7),
(2, 8), (3, 8), (0, 8),
(2, 9), (3, 9), (0, 9),
(2, 10), (3, 10), (0, 10),
(2, 11), (3, 11), (0, 11),
(2, 12), (3, 12), (0, 12),
(2, 13), (3, 13), (0, 13),
(2, 14), (3, 14), (0, 14),
(2, 15), (3, 15), (0, 15),
(2, 16), (3, 16), (0, 16),
(2, 17), (3, 17), (0, 17),
(2, 18), (3, 18), (0, 18),
(2, 19), (3, 19), (0, 19),
(2, 20), (3, 20), (0, 20),
(2, 21), (3, 21), (0, 21),
(2, 22), (3, 22), (0, 22),
(2, 23), (3, 23), (0, 23),
(2, 24), (3, 24), (0, 24),
(2, 25), (3, 25), (0, 25),
(2, 26), (3, 26), (0, 26),
(2, 27), (3, 27), (0, 27),
(2, 28), (3, 28), (0, 28),
(2, 29), (3, 29), (0, 29),
(2, 30), (3, 30), (0, 30),
(2, 31), (3, 31), (0, 31),
(2, 32), (3, 32), (0, 32),
(2, 33), (3, 33), (0, 33),
(2, 34), (3, 34), (0, 34),
(2, 35), (3, 35), (0, 35),
(2, 36), (3, 36), (0, 36),
(2, 37), (3, 37), (0, 37),
(2, 38), (3, 38), (0, 38),
(2, 39), (3, 39), (0, 39),
(2, 40), (3, 40), (0, 40),
(2, 41), (3, 41), (0, 41),
(2, 42), (3, 42), (0, 42),
(2, 43), (3, 43), (0, 43),
(2, 44), (3, 44), (0, 44),
(2, 45), (3, 45), (0, 45),
(2, 46), (3, 46), (0, 46),
(2, 47), (3, 47), (0, 47),
(2, 48), (3, 48), (0, 48),
(2, 49), (3, 49), (0, 49),
(2, 50), (3, 50), (0, 50),
(2, 51), (3, 51), (0, 51),
(2, 52), (3, 52), (0, 52),
(2, 53), (3, 53), (0, 53),
(2, 54), (3, 54), (0, 54),
(2, 55), (3, 55), (0, 55),
(2, 56), (3, 56), (0, 56),
(2, 57), (3, 57), (0, 57),
(2, 58), (3, 58), (0, 58),
(2, 59), (3, 59), (0, 59),
(2, 60), (3, 60), (0, 60),
(2, 61), (3, 61), (0, 61),
(2, 62), (3, 62), (0, 62),
(2, 63), (3, 63), (0, 63),
(2, 64), (3, 64), (0, 64),
(2, 65), (3, 65), (0, 65),
(2, 66), (3, 66), (0, 66),
(2, 67), (3, 67), (0, 67),
(2, 68), (3, 68), (0, 68),
(2, 69), (3, 69), (0, 69),
(2, 70), (3, 70), (0, 70),
(2, 71), (3, 71), (0, 71),
(2, 72), (3, 72), (0, 72),
(2, 73), (3, 73), (0, 73),
(2, 74), (3, 74), (0, 74),
(2, 75), (3, 75), (0, 75),
(2, 76), (3, 76), (0, 76),
(2, 77), (3, 77), (0, 77),
(2, 78), (3, 78), (0, 78),
(2, 79), (3, 79), (0, 79),
(2, 80), (3, 80), (0, 80),
(2, 81), (3, 81), (0, 81),
(2, 82), (3, 82), (0, 82),
(2, 83), (3, 83), (0, 83),
(2, 84), (3, 84), (0, 84),
(2, 85), (3, 85), (0, 85),
(2, 86), (3, 86), (0, 86),
(2, 87), (3, 87), (0, 87),
(2, 88), (3, 88), (0, 88),
(2, 89), (3, 89), (0, 89),
(2, 90), (3, 90), (0, 90),
(2, 91), (3, 91), (0, 91),
(2, 92), (3, 92), (0, 92),
(2, 93), (3, 93), (0, 93),
(2, 94), (3, 94), (0, 94),
(2, 95), (3, 95), (0, 95),
(2, 96), (3, 96), (0, 96),
(2, 97), (3, 97), (0, 97),
(2, 98), (3, 98), (0, 98),
(2, 99), (3, 99), (0, 99),
(2, 100), (3, 100), (0, 100),
(2, 101), (3, 101), (0, 101),
(2, 102), (3, 102), (0, 102),
(2, 103), (3, 103), (0, 103),
(2, 104), (3, 104), (0, 104),
(2, 105), (3, 105), (0, 105),
(2, 106), (3, 106), (0, 106),
(2, 107), (3, 107), (0, 107),
(2, 108), (3, 108), (0, 108),
(2, 109), (3, 109), (0, 109),
(2, 110), (3, 110), (0, 110),
(2, 111), (3, 111), (0, 111),
(2, 112), (3, 112), (0, 112),
(2, 113), (3, 113), (0, 113),
(2, 114), (3, 114), (0, 114),
(2, 115), (3, 115), (0, 115),
(2, 116), (3, 116), (0, 116),
(2, 117), (3, 117), (0, 117),
(2, 118), (3, 118), (0, 118),
(2, 119), (3, 119), (0, 119),
(2, 120), (3, 120), (0, 120),
(2, 121), (3, 121), (0, 121),
(2, 122), (3, 122), (0, 122),
(2, 123), (3, 123), (0, 123),
(2, 124), (3, 124), (0, 124),
(2, 125), (3, 125), (0, 125),
(2, 126), (3, 126), (0, 126),
(2, 127), (3, 127), (0, 127),
(2, 128), (3, 128), (0, 128),
(2, 129), (3, 129), (0, 129),
(2, 130), (3, 130), (0, 130),
(2, 131), (3, 131), (0, 131),
(2, 132), (3, 132), (0, 132),
(2, 133), (3, 133), (0, 133),
(2, 134), (3, 134), (0, 134),
(2, 135), (3, 135), (0, 135),
(2, 136), (3, 136), (0, 136),
(2, 137), (3, 137), (0, 137),
(2, 138), (3, 138), (0, 138),
(2, 139), (3, 139), (0, 139),
(2, 140), (3, 140), (0, 140),
(2, 141), (3, 141), (0, 141),
(2, 142), (3, 142), (0, 142),
(2, 143), (3, 143), (0, 143),
(1, 144), (1, 145), (1, 146),
(1, 147), (1, 148), (1, 149),
(1, 150), (1, 151), (1, 152),
(1, 153), (9, 9), (9, 9), (9, 9),
(0, 0), (0, 0), (0, 0), (0, 0),
(0, 0), (0, 0), (0, 0), (0, 0),
(0, 0), (0, 0), (0, 0), (0, 0),
(0, 0), (0, 0), (0, 0), (0, 0),
(0, 0));
(*
Gameboy Memory map
--------------------------- FFFF | 32kB ROMs are non-switchable and occupy
I/O ports + internal RAM | 0000-7FFF are. Bigger ROMs use one of two
--------------------------- FF00 | different bank switches. The type of a
Internal RAM | bank switch can be determined from the
--------------------------- C000 | internal info area located at 0100-014F
8kB switchable RAM bank | in each cartridge.
--------------------------- A000 |
16kB VRAM | MBC1 (Memory Bank Controller 1):
--------------------------- 8000 | Writing a value into 2000-3FFF area will
16kB switchable ROM bank | select an appropriate ROM bank at
--------------------------- 4000 | 4000-7FFF. Writing a value into 4000-5FFF
16kB ROM bank #0 | area will select an appropriate RAM bank
--------------------------- 0000 | at A000-C000.
|
| MBC2 (Memory Bank Controller 2):
| Writing a value into 2100-21FF area will
| select an appropriate ROM bank at
| 4000-7FFF. RAM switching is not provided.
*)
procedure load(Name: string);
function ReadGameState(filename: string): byte;
function SaveGameState(filename: string): boolean;
implementation
procedure load(Name: string);
var
cf: file;
m_rom: array[0..$180 - 1] of byte;
i, c1: byte;
S: string;
begin
assignfile(cf, Name);
Filemode:=0;
reset(cf, 1);
blockread(cf, {%H-}m_rom, $180);
closefile(cf);
buffer := ' ';
for i := 0 to 15 do
begin
c1 := m_rom[$134 + i];
if (c1 = $80) or (c1 = $c0) then
c1 := 0;
buffer[i] := chr(c1);
buffer[i + 1] := #0;
if buffer[i] = #0 then
break;
end;
romname := '';
i := 0;
repeat
romname := romname + buffer[i];
Inc(i);
until buffer[i] = #0;
case m_rom[$147] of
0:
begin
s := ' ROM ONLY';
memc := ROM;
end;
1:
begin
s := ' MBC1,';
memc := MBC1;
end;
2:
begin
s := ' MBC1+RAM,';
memc := MBC1;
end;
3:
begin
s := ' MBC1+RAM+BAT,';
memc := MBC1;
end;
5:
begin
s := ' MBC2,';
memc := MBC2;
end;
6:
begin
s := ' MBC2+BAT,';
memc := MBC2;
end;
8:
begin
s := ' ROM+RAM,';
memc := ROM;
end;
9:
begin
s := ' ROM+RAM+BAT,';
memc := ROM;
end;
$f:
begin
s := ' MBC3+TMR+BAT,';
memc := MBC3;
end;
$10:
begin
s := ' MBC3+RAM+TMR+BAT,';
memc := MBC3;
end;
$11:
begin
s := ' MBC3,';
memc := MBC3;
end;
$12:
begin
s := ' MBC3+RAM,';
memc := MBC3;
end;
$13:
begin
s := ' MBC3+RAM+BAT,';
memc := MBC3;
end;
$19:
begin
s := ' MBC5,';
memc := MBC5;
end;
$1a:
begin
s := ' MBC5+RAM,';
memc := MBC5;
end;
$1b:
begin
s := ' MBC5+RAM+BAT,';
memc := MBC5;
end;
$1c:
begin
s := ' MBC5+RP,';
memc := MBC5;
end;
$1d:
begin
s := ' MBC5+RP+RAM,';
memc := MBC5;
end;
$1e:
begin
s := ' MBC5+RP+RAM+BAT,';
memc := MBC5;
end;
end;
case m_rom[$148] of
0:
begin
s := s + ' 32 KB ROM,';
srom := 2;
end;
1:
begin
s := s + ' 64 KB ROM,';
srom := 4;
end;
2:
begin
s := s + ' 128 KB ROM,';
srom := 8;
end;
3:
begin
s := s + ' 256 KB ROM,';
srom := 16;
end;
4:
begin
s := s + ' 512 KB ROM,';
srom := 32;
end;
5:
begin
s := s + ' 1 MB ROM,';
srom := 64;
end;
6:
begin
s := s + ' 2 MB ROM,';
srom := 128;
end;
7:
begin
s := s + ' 4 MB EOM,';
srom := 256;
end;
$52:
begin
s := s + ' 1.1 MB ROM,';
srom := 72;
end;
$53:
begin
s := s + ' 1.2 MB ROM,';
srom := 80;
end;
$54:
begin
s := s + ' 1.5 MB ROM,';
srom := 96;
end;
end;
case m_rom[$149] of
0:
begin
s := s + ' 0 KB RAM';
sram := 0;
end;
1:
begin
s := s + ' 2 KB RAM';
sram := 1;
end;
2:
begin
s := s + ' 8 KB RAM';
sram := 1;
end;
3:
begin
s := s + ' 32 KB RAM';
sram := 4;
end;
4:
begin
s := s + ' 128 KB RAM';
sram := 16;
end;
end;
if cart <> nil then
freemem(cart, cartsize);
cartsize := srom * 16384;
assignfile(cf, Name);
reset(cf, 1);
getmem(cart, cartsize);
blockread(cf, cart^, srom * 16384);
closefile(cf);
f_stopped := False;
speicher := s;
// GetCurrentDirectory(sizeof(dirload),dirload);
end;
function SaveGameState(filename: string): boolean;
var
f: file;
numwritten, fsize: DWord;
begin
if gb_mode = cgb then
fsize := 32 * 1024
else
fsize := 8 * 1024;
{ case byte(pchar(cart)[$149]) of
0: fsize:= 0;
1: fsize:= 2*1024;
2: fsize:= 8*1024;
3: fsize:= 32*1024;
4: fsize:=128*1024;
end;}
if fsize = 0 then
begin
Result := True;
exit;
end; // NO RAM?
{$i-}
assignfile(f, filename);
rewrite(f, 1);
{$i+}
if ioresult <> 0 then
begin
Result := False;
exit;
end;
blockwrite(f, m_ram, fsize, {%H-}numwritten);
closefile(f);
Result := fsize = numwritten;
end;
function ReadGameState(filename: string): byte;
var
f: file;
fsize: DWord;
begin
if gb_mode = cgb then
fsize := 32 * 1024
else
fsize := 8 * 1024;
{case byte(pchar(cart)[$149]) of
0: fsize:= 0;
1: fsize:= 2*1024;
2: fsize:= 8*1024;
3: fsize:= 32*1024;
4: fsize:=128*1024;
end;}
if fsize = 0 then
begin
Result := 1;
exit;
end; // NO RAM?
{$i-}
assignfile(f, filename);
reset(f, 1);
{$i+}
if ioresult <> 0 then
begin
Result := 2;
exit;
end;// not found
if fsize = filesize(f) then
begin
blockread(f, m_ram, fsize);
Result := 0; // ok
end
else
Result := 3; // no valid savegame
closefile(f);
end;
end.
|
