146 lines
3.0 KiB
C
146 lines
3.0 KiB
C
#ifndef C64_RASTERIRQ_H
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#define C64_RASTERIRQ_H
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#include "types.h"
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#ifndef NUM_IRQS
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#define NUM_IRQS 16
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#endif
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extern volatile byte rirq_count;
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enum RIRQCodeIndex
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{
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RIRQ_DATA_0 = 1,
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RIRQ_DATA_1 = 3,
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RIRQ_ADDR_0 = 10,
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RIRQ_ADDR_1 = 13,
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RIRQ_DATA_2 = 16,
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RIRQ_ADDR_2 = 18,
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RIRQ_DATA_3 = 21,
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RIRQ_ADDR_3 = 23,
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RIRQ_DATA_4 = 26,
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RIRQ_ADDR_4 = 28,
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RIRQ_SIZE = 31,
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RIRQ_DATA_5 = 31,
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RIRQ_ADDR_5 = 33,
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RIRQ_DATA_6 = 36,
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RIRQ_ADDR_6 = 38,
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RIRQ_DATA_7 = 41,
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RIRQ_ADDR_7 = 43,
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RIRQ_DATA_8 = 46,
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RIRQ_ADDR_8 = 48,
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RIRQ_DATA_9 = 51,
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RIRQ_ADDR_9 = 53,
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RIRQ_DATA_10 = 56,
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RIRQ_ADDR_10 = 58,
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RIRQ_DATA_11 = 61,
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RIRQ_ADDR_11 = 63,
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RIRQ_DATA_12 = 66,
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RIRQ_ADDR_12 = 68,
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RIRQ_DATA_13 = 71,
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RIRQ_ADDR_13 = 73,
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RIRQ_DATA_14 = 76,
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RIRQ_ADDR_14 = 78,
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RIRQ_DATA_15 = 81,
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RIRQ_ADDR_15 = 83,
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RIRQ_DATA_16 = 86,
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RIRQ_ADDR_16 = 88,
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RIRQ_DATA_17 = 91,
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RIRQ_ADDR_17 = 93,
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RIRQ_DATA_18 = 96,
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RIRQ_ADDR_18 = 98,
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RIRQ_DATA_19 = 101,
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RIRQ_ADDR_19 = 103,
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RIRQ_SIZE_20 = 106,
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};
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// One raster interrupt operation, handles up to five writes
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// to arbitrary memory location, or one wait and four writes.
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typedef struct RIRQCode
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{
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byte size;
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byte code[RIRQ_SIZE];
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} RIRQCode;
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typedef struct RQIRCode20
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{
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RIRQCode c;
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byte code[RIRQ_SIZE_20 - RIRQ_SIZE];
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} RIRQCode20;
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// Build one raster IRQ operation of the given size (wait + #ops) for up to 5 instructions
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void rirq_build(RIRQCode * ic, byte size);
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// Allocate one raster IRQ operation of the given size (wait + #ops)
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RIRQCode * rirq_alloc(byte size);
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// Add a write command to a raster IRQ
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inline void rirq_write(RIRQCode * ic, byte n, void * addr, byte data);
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// Add a call command to a raster IRQ
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inline void rirq_call(RIRQCode * ic, byte n, void * addr);
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// Change the address of a raster IRQ write command
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inline void rirq_addr(RIRQCode * ic, byte n, void * addr);
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// Change the data of a raster IRQ write command
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inline void rirq_data(RIRQCode * ic, byte n, byte data);
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// Add a delay of 5 * cycles to a raster IRQ
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inline void rirq_delay(RIRQCode * ic, byte cycles);
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// Place a raster IRQ into one of the 16 slots
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inline void rirq_set(byte n, byte row, RIRQCode * write);
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// Remove a raster IRQ from one of the 16 slots
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inline void rirq_clear(byte n)
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// Change the vertical position of the raster IRQ of one of the slots
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inline void rirq_move(byte n, byte row);
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// Initialize the raster IRQ system with either the kernal IRQ vector
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// or the hardware IRQ vector if the kernal ROM is turned off (which is
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// the less resource hungry option)
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void rirq_init(bool kernalIRQ);
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// Start raster IRQ
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void rirq_start(void);
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// Stop raster IRQ
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void rirq_stop(void);
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// Sort the raster IRQ, must be performed at the end of the frame after changing
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// the vertical position of one of the interrupt operatins.
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void rirq_sort(void);
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// Wait for the last raster IRQ op to have completed. Must be called before a
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// sort if the raster IRQ system is active
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void rirq_wait(void);
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#pragma compile("rasterirq.c")
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#endif
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