mirror of
https://github.com/rkujawa/rk65c02.git
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a73ebc3024
- interrupts: IRQ vector at $FFFE, vector device at $FFFC, idle_wait + assert_irq - hello_serial: custom bus device at $DE00, guest writes host prints - stepper: rk65c02_step(1) loop with regs and disassembly - jit_bench: min3.rom interpreter vs JIT wall time - breakpoints: debug_breakpoint_add at min3 entry, inspect then continue - README: document new examples, run from examples/ or make run-<name> - Makefile: EXAMPLES and run-* targets for all five Made-with: Cursor
77 lines
1.5 KiB
C
77 lines
1.5 KiB
C
/*
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* Hello-serial example — custom bus device at $DE00, guest writes, host prints.
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*
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* Build: make hello_serial hello_serial.rom
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* Run: ./hello_serial
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*
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* Demonstrates: bus_device_add with a host-defined device (no MMU); guest
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* writes bytes to $DE00, device write_1 callback prints to stdout.
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* Expected: "Hi!" printed, then PASS and exit 0.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include "bus.h"
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#include "device.h"
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#include "rk65c02.h"
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static const uint16_t load_addr = 0xC000;
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#define SERIAL_BASE 0xDE00
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#define SERIAL_SIZE 16
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static uint8_t serial_read_1(void *config, uint16_t doff)
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{
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(void)config;
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(void)doff;
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return 0;
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}
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static void serial_write_1(void *config, uint16_t doff, uint8_t val)
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{
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(void)config;
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(void)doff;
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putchar((char)val);
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}
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static device_t serial_device = {
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.name = "serial",
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.size = SERIAL_SIZE,
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.read_1 = serial_read_1,
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.write_1 = serial_write_1,
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.finish = NULL,
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.config = NULL,
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.aux = NULL
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};
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int
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main(void)
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{
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bus_t bus;
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rk65c02emu_t e;
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bus = bus_init_with_default_devs();
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bus_device_add(&bus, &serial_device, SERIAL_BASE);
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if (!bus_load_file(&bus, load_addr, "hello_serial.rom")) {
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fprintf(stderr, "FAIL: could not load hello_serial.rom\n");
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bus_finish(&bus);
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return 1;
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}
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e = rk65c02_init(&bus);
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e.regs.SP = 0xFF;
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e.regs.PC = load_addr;
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rk65c02_start(&e);
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bus_finish(&bus);
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if (e.stopreason != STP) {
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fprintf(stderr, "FAIL: expected STP, got %s\n",
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rk65c02_stop_reason_string(e.stopreason));
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return 1;
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}
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printf("\nPASS: guest wrote to $DE00, host printed output.\n");
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return 0;
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}
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