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Establish display processing

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This commit is contained in:
GuyPerfect
2024-10-16 16:15:39 -05:00
parent c91eb0785f
commit 448658430c
4 changed files with 305 additions and 96 deletions
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core/vb.c
+55 -25
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@@ -96,21 +96,34 @@ struct VB {
uint8_t cta_r; /* Right column table index */
} cta;
/* Display control */
/* Display processor */
struct {
uint8_t disp; /* Display enabled */
uint8_t fclk; /* Frame clock signal high */
uint8_t l0bsy; /* Displaying left frame buffer 0 */
uint8_t l1bsy; /* Displaying left frame buffer 1 */
uint8_t lock; /* Lock CTA */
uint8_t r0bsy; /* Displaying right frame buffer 0 */
uint8_t r1bsy; /* Displaying right frame buffer 1*/
uint8_t re; /* Memory refresh enabled */
uint8_t scanrdy; /* Mirrors are stable */
uint8_t synce; /* Servo enabled */
} dpctrl;
/* Drawing control */
/* Hardware state */
uint8_t disp; /* Display enabled */
uint8_t fclk; /* Frame clock signal high */
uint8_t l0bsy; /* Displaying left frame buffer 0 */
uint8_t l1bsy; /* Displaying left frame buffer 1 */
uint8_t lock; /* Lock CTA */
uint8_t r0bsy; /* Displaying right frame buffer 0 */
uint8_t r1bsy; /* Displaying right frame buffer 1*/
uint8_t re; /* Memory refresh enabled */
uint8_t scanrdy; /* Mirrors are stable */
uint8_t synce; /* Servo enabled */
/* Simulation state */
uint8_t brt[4]; /* Precomputed brightness */
int buffer; /* Index of frame buffer to display */
uint32_t clocks; /* Master clocks to wait */
int column; /* Index of column to display */
uint32_t cta; /* Column table pointer in memory */
uint32_t fbDest; /* Output frame pixel address */
uint32_t fbSrc; /* Source frame buffer address */
int32_t repeat; /* Current column table repeat value */
int step; /* Processing phase */
} dp;
/* Pixel processor */
struct {
uint8_t f0bsy; /* Drawing into frame buffer 0 */
uint8_t f1bsy; /* Drawing into frame buffer 1 */
@@ -119,7 +132,7 @@ struct VB {
uint8_t sbcount; /* Current vertical output position */
uint8_t sbout; /* Drawing specified vertical output position */
uint8_t xpen; /* Drawing enabled */
} xpctrl;
} xp;
/* Control state */
uint8_t bkcol; /* Backdrop color */
@@ -131,8 +144,11 @@ struct VB {
uint8_t jplt[4][4]; /* Object palettes */
uint16_t spt[4]; /* Object control */
/* Output frame buffers [buffer index][0=left, 1=right][pixel index] */
uint8_t frames[2][2][384 * 224];
/* Other state */
uint8_t vram[0x40000]; /* Video memory */
uint8_t ram[0x40000]; /* Video memory */
} vip;
/* Other state */
@@ -142,6 +158,7 @@ struct VB {
vbOnException onException; /* CPU exception */
vbOnExecute onExecute; /* CPU instruction execute */
vbOnFetch onFetch; /* CPU instruction fetch */
vbOnFrame onFrame; /* VIP frame ready */
vbOnRead onRead; /* CPU instruction read */
vbOnWrite onWrite; /* CPU instruction write */
void *tag; /* User data */
@@ -242,21 +259,26 @@ VBAPI void* vbGetCartROM(VB *sim, uint32_t *size) {
return sim->cart.rom;
}
/* Retrieve the exception callback handle */
/* Retrieve the exception callback handler */
VBAPI vbOnException vbGetExceptionCallback(VB *sim) {
return sim->onException;
}
/* Retrieve the execute callback handle */
/* Retrieve the execute callback handler */
VBAPI vbOnExecute vbGetExecuteCallback(VB *sim) {
return sim->onExecute;
}
/* Retrieve the fetch callback handle */
/* Retrieve the fetch callback handler */
VBAPI vbOnFetch vbGetFetchCallback(VB *sim) {
return sim->onFetch;
}
/* Retrieve the frame callback handler */
VBAPI vbOnFrame vbGetFrameCallback(VB *sim) {
return sim->onFrame;
}
/* Retrieve the value of the program counter */
VBAPI uint32_t vbGetProgramCounter(VB *sim) {
return sim->cpu.pc;
@@ -267,7 +289,7 @@ VBAPI int32_t vbGetProgramRegister(VB *sim, int index) {
return index < 1 || index > 31 ? 0 : sim->cpu.program[index];
}
/* Retrieve the read callback handle */
/* Retrieve the read callback handler */
VBAPI vbOnRead vbGetReadCallback(VB *sim) {
return sim->onRead;
}
@@ -282,7 +304,7 @@ VBAPI void* vbGetUserData(VB *sim) {
return sim->tag;
}
/* Retrieve the write callback handle */
/* Retrieve the write callback handler */
VBAPI vbOnWrite vbGetWriteCallback(VB *sim) {
return sim->onWrite;
}
@@ -293,6 +315,7 @@ VBAPI VB* vbInit(VB *sim) {
sim->cart.rom = NULL;
sim->onExecute = NULL;
sim->onFetch = NULL;
sim->onFrame = NULL;
sim->onRead = NULL;
sim->onWrite = NULL;
vbReset(sim);
@@ -344,27 +367,34 @@ VBAPI int vbSetCartROM(VB *sim, void *rom, uint32_t size) {
return 0;
}
/* Specify a new exception callback handle */
/* Specify a new exception callback handler */
VBAPI vbOnException vbSetExceptionCallback(VB *sim, vbOnException callback) {
vbOnException prev = sim->onException;
sim->onException = callback;
return prev;
}
/* Specify a new execute callback handle */
/* Specify a new execute callback handler */
VBAPI vbOnExecute vbSetExecuteCallback(VB *sim, vbOnExecute callback) {
vbOnExecute prev = sim->onExecute;
sim->onExecute = callback;
return prev;
}
/* Specify a new fetch callback handle */
/* Specify a new fetch callback handler */
VBAPI vbOnFetch vbSetFetchCallback(VB *sim, vbOnFetch callback) {
vbOnFetch prev = sim->onFetch;
sim->onFetch = callback;
return prev;
}
/* Specify a new frame callback handler */
VBAPI vbOnFrame vbSetFrameCallback(VB *sim, vbOnFrame callback) {
vbOnFrame prev = sim->onFrame;
sim->onFrame = callback;
return prev;
}
/* Specify a new value for the program counter */
VBAPI uint32_t vbSetProgramCounter(VB *sim, uint32_t value) {
sim->cpu.operation = CPU_FETCH;
@@ -378,7 +408,7 @@ VBAPI int32_t vbSetProgramRegister(VB *sim, int index, int32_t value) {
return index < 1 || index > 31 ? 0 : (sim->cpu.program[index] = value);
}
/* Specify a new read callback handle */
/* Specify a new read callback handler */
VBAPI vbOnRead vbSetReadCallback(VB *sim, vbOnRead callback) {
vbOnRead prev = sim->onRead;
sim->onRead = callback;
@@ -391,7 +421,7 @@ VBAPI uint32_t vbSetSystemRegister(VB *sim, int index, uint32_t value) {
cpuSetSystemRegister(sim, index, value, 1);
}
/* Specify a new write callback handle */
/* Specify a new write callback handler */
VBAPI vbOnWrite vbSetWriteCallback(VB *sim, vbOnWrite callback) {
vbOnWrite prev = sim->onWrite;
sim->onWrite = callback;