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vdp1: improve point access

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This adds a new union to the vdp1 command list.
This commit is contained in:
Zack Buhman 2023-07-01 04:13:16 +00:00
parent 9ef2884cbc
commit 912c67e2e6
2 changed files with 39 additions and 23 deletions
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12
scsp.h
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@ -297,10 +297,10 @@ enum dma_bits {
// timer bits
//enum tima_bits {
#define TIMA__TACTL(n) ((n & 0b111) << 8)
#define TIMB__TBCTL(n) ((n & 0b111) << 8)
#define TIMC__TCCTL(n) ((n & 0b111) << 8)
#define TIMA__TIMA(n) ((n & 0xff) << 0)
#define TIMB__TIMB(n) ((n & 0xff) << 0)
#define TIMC__TIMC(n) ((n & 0xff) << 0)
#define TIMA__TACTL(n) (((n) & 0b111) << 8)
#define TIMB__TBCTL(n) (((n) & 0b111) << 8)
#define TIMC__TCCTL(n) (((n) & 0b111) << 8)
#define TIMA__TIMA(n) (((n) & 0xff) << 0)
#define TIMB__TIMB(n) (((n) & 0xff) << 0)
#define TIMC__TIMC(n) (((n) & 0xff) << 0)
//};

50
vdp1.h
View File

@ -4,6 +4,11 @@
/* command table */
typedef struct cmd_point {
s16 X;
s16 Y;
} cmd_point;
typedef struct vdp1_cmd {
u16 CTRL;
u16 LINK;
@ -11,14 +16,25 @@ typedef struct vdp1_cmd {
u16 COLR;
u16 SRCA;
u16 SIZE;
s16 XA;
s16 YA;
s16 XB;
s16 YB;
s16 XC;
s16 YC;
s16 XD;
s16 YD;
union {
struct {
s16 XA;
s16 YA;
s16 XB;
s16 YB;
s16 XC;
s16 YC;
s16 XD;
s16 YD;
};
struct {
cmd_point A;
cmd_point B;
cmd_point C;
cmd_point D;
};
cmd_point point[4];
};
u16 GDRA;
u16 _dummy;
} vdp1_cmd;
@ -87,7 +103,7 @@ enum pmod_bit {
enum colr_bit {
COLR__RGB = (1 << 15)
#define COLR__ADDRESS(n) (n >> 3)
#define COLR__ADDRESS(n) ((n) >> 3)
};
//enum srca_bit {
@ -102,23 +118,23 @@ enum colr_bit {
/* memory offsets */
typedef union vdp1_vram {
unsigned char u8[0x080000 / 1];
unsigned short u16[0x080000 / 2];
unsigned long u32[0x080000 / 4];
vdp1_cmd cmd[0x080000 / 0x20];
uint8_t u8[0x080000 / 1];
uint16_t u16[0x080000 / 2];
uint32_t u32[0x080000 / 4];
vdp1_cmd cmd[0x080000 / 0x20];
} vdp1_vram;
static_assert((sizeof (union vdp1_vram)) == 0x080000);
typedef union vdp1_framebuffer {
unsigned char u8[0x040000 / 1];
unsigned short u16[0x040000 / 2];
unsigned long u32[0x040000 / 4];
uint8_t u8[0x040000 / 1];
uint16_t u16[0x040000 / 2];
uint32_t u32[0x040000 / 4];
} vdp1_framebuffer;
static_assert((sizeof (union vdp1_framebuffer)) == 0x040000);
typedef unsigned char vdp1_res0[0x040000];
typedef u8 vdp1_res0[0x040000];
typedef struct vdp1_reg {
reg16 TVMR; /* TV MODE SELECTION */