mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-25 03:34:05 +00:00
159 lines
3.8 KiB
C
159 lines
3.8 KiB
C
|
|
typedef unsigned char byte;
|
|
typedef signed char sbyte;
|
|
typedef unsigned short word;
|
|
typedef signed short sword;
|
|
|
|
/// HARDWARE
|
|
|
|
__sfr __at(0x00) hw_col0r; // palette 0
|
|
__sfr __at(0x01) hw_col1r;
|
|
__sfr __at(0x02) hw_col2r;
|
|
__sfr __at(0x03) hw_col3r;
|
|
__sfr __at(0x04) hw_col0l;
|
|
__sfr __at(0x05) hw_col1l;
|
|
__sfr __at(0x06) hw_col2l;
|
|
__sfr __at(0x07) hw_col3l; // palette 7
|
|
|
|
__sfr __at(0x08) hw_intst; // intercept test feedback
|
|
__sfr __at(0x09) hw_horcb; // horiz color boundary
|
|
__sfr __at(0x0a) hw_verbl; // vertical blanking line * 2
|
|
__sfr __at(0x0c) hw_magic; // magic register
|
|
__sfr __at(0x0d) hw_infbk; // interrupt feedback
|
|
__sfr __at(0x0e) hw_inmod; // interrupt enable
|
|
__sfr __at(0x0f) hw_inlin; // interrupt line
|
|
__sfr __at(0x19) hw_xpand; // expander register
|
|
|
|
__sfr __at(0x10) hw_p1ctrl; // player controls
|
|
__sfr __at(0x11) hw_p2ctrl; // player controls
|
|
__sfr __at(0x12) hw_p3ctrl; // player controls
|
|
__sfr __at(0x13) hw_p4ctrl; // player controls
|
|
__sfr __at(0x14) hw_keypad0;
|
|
__sfr __at(0x15) hw_keypad1;
|
|
__sfr __at(0x16) hw_keypad2;
|
|
__sfr __at(0x17) hw_keypad3;
|
|
__sfr __at(0x1c) hw_p1pot; // player pot
|
|
__sfr __at(0x1d) hw_p2pot; // player pot
|
|
__sfr __at(0x1e) hw_p3pot; // player pot
|
|
__sfr __at(0x1f) hw_p4pot; // player pot
|
|
|
|
#define M_SHIFT0 0x00
|
|
#define M_SHIFT1 0x01
|
|
#define M_SHIFT2 0x02
|
|
#define M_SHIFT3 0x03
|
|
#define M_XPAND 0x08
|
|
#define M_MOVE 0x00
|
|
#define M_OR 0x10
|
|
#define M_XOR 0x20
|
|
#define M_FLOP 0x40
|
|
#define M_SHIFT(x) ((x)&3)
|
|
#define XPAND_COLORS(off,on) (((off)&3) | (((on)&3)<<2))
|
|
|
|
// font options
|
|
#define OPT_1x1 0x00
|
|
#define OPT_2x2 0x40
|
|
#define OPT_4x4 0x80
|
|
#define OPT_8x8 0xc0
|
|
#define OPT_XOR 0x20
|
|
#define OPT_OR 0x10
|
|
#define OPT_ON(n) ((n)<<2)
|
|
#define OPT_OFF(n) ((n))
|
|
|
|
// bcd options
|
|
#define DISBCD_SML 0x40
|
|
#define DISBCD_NOZERO 0x80
|
|
|
|
/// GRAPHICS FUNCTIONS
|
|
|
|
#define VHEIGHT 102 // number of scanlines
|
|
#define VBWIDTH 40 // number of bytes per scanline
|
|
#define PIXWIDTH 160 // 4 pixels per byte
|
|
|
|
//#define EXIT_CLIPDEST(addr) if ((((word)addr)&0xfff) >= 0xe10) return
|
|
#define EXIT_CLIPDEST(addr)
|
|
|
|
byte __at (0x0000) vmagic[VHEIGHT][VBWIDTH];
|
|
byte __at (0x4000) vidmem[VHEIGHT][VBWIDTH];
|
|
|
|
typedef enum {
|
|
SNUL,
|
|
SCT0,SCT1,SCT2,SCT3,SCT4,SCT5,SCT6,SCT7,
|
|
SF0,SF1,SF2,SF3,SF4,SF5,SF6,SF7,
|
|
SSEC,
|
|
SKYU,SKYD,
|
|
ST0,SJ0,ST1,SJ1,ST2,SJ2,ST3,SJ3,
|
|
SP0,SP1,SP2,SP3
|
|
} SENTRYCode;
|
|
|
|
typedef struct {
|
|
byte base_ch; // first char
|
|
byte frame_x; // frame width
|
|
byte frame_y; // frame height
|
|
byte pattern_x; // pattern width
|
|
byte pattern_y; // pattern height
|
|
const byte* chartab; // pointer to char data
|
|
} FontDescriptor;
|
|
|
|
typedef struct {
|
|
sbyte xofs, yofs;
|
|
byte xsize, ysize;
|
|
byte pattern[0];
|
|
} PatternBlock;
|
|
|
|
const FontDescriptor __at(0x206) FNTSYS; // = { 0x20, 8, 8, 1, 7, (byte*)BIGFONT };
|
|
const FontDescriptor __at(0x20d) FNTSML; // = { 0xa0, 4, 6, 1, 5, (byte*)SMLFONT };
|
|
|
|
///// INTERPRETER
|
|
|
|
typedef struct {
|
|
union {
|
|
struct {
|
|
word iy,ix,de,bc,af,hl;
|
|
} w;
|
|
struct {
|
|
byte iyl,iyh,ixl,ixh,e,d,c,b,f,a,l,h;
|
|
} b;
|
|
} regs;
|
|
byte* params;
|
|
} ContextBlock;
|
|
|
|
#define REG_IY 0x1
|
|
#define REG_E 0x2
|
|
#define REG_D 0x4
|
|
#define REG_C 0x8
|
|
#define REG_B 0x10
|
|
#define REG_IX 0x20
|
|
#define REG_A 0x40
|
|
#define REG_HL 0x80
|
|
#define REG_DE (REG_D|REG_E)
|
|
#define REG_BC (REG_B|REG_C)
|
|
|
|
#define _IY (ctx->regs.w.iy)
|
|
#define _IX (ctx->regs.w.ix)
|
|
#define _DE (ctx->regs.w.de)
|
|
#define _BC (ctx->regs.w.bc)
|
|
#define _AF (ctx->regs.w.af)
|
|
#define _HL (ctx->regs.w.hl)
|
|
#define _IXL (ctx->regs.b.ixl)
|
|
#define _IXH (ctx->regs.b.ixh)
|
|
#define _IYL (ctx->regs.b.iyl)
|
|
#define _IYH (ctx->regs.b.iyh)
|
|
#define _E (ctx->regs.b.e)
|
|
#define _D (ctx->regs.b.d)
|
|
#define _C (ctx->regs.b.c)
|
|
#define _B (ctx->regs.b.b)
|
|
#define _A (ctx->regs.b.a)
|
|
#define _L (ctx->regs.b.l)
|
|
#define _H (ctx->regs.b.h)
|
|
|
|
typedef void (Routine)();
|
|
typedef void (SysRoutine)(ContextBlock *ctx);
|
|
|
|
typedef struct {
|
|
SysRoutine* routine;
|
|
byte argmask;
|
|
} SysCallEntry;
|
|
|
|
void SYSCALL(ContextBlock *ctx);
|
|
|