Do some work on the CPU, assembler still needs update

cpu/memory.c

@@ -0,0 +1,62 @@
+//
+// Created by bruno on 2.2.2025.
+//
+
+#include "memory.h"
+
+uint8_t write_mem(CPU *cpu, uint32_t addr, uint8_t value) {
+    if (addr >= MEM_SIZE) {
+        return 1;
+    }
+
+    switch (addr) {
+
+        default:
+            cpu->memory[addr] = value;
+    }
+
+    return 0;
+}
+
+uint8_t read_mem(CPU *cpu, uint32_t addr) {
+    if (addr >= MEM_SIZE) {
+        return 0;
+    }
+    switch (addr) {
+
+        default:
+            return cpu->memory[addr];
+    }
+}
+
+uint16_t read_mem16(CPU *cpu, uint32_t addr) {
+    return read_mem(cpu, addr) | (read_mem(cpu, addr + 1) << 8);
+}
+
+uint32_t read_mem32(CPU *cpu, uint32_t addr) {
+    return read_mem16(cpu, addr) | (read_mem16(cpu, addr + 2) << 16);
+}
+
+uint8_t write_mem16(CPU *cpu, uint32_t addr, uint16_t value) {
+    uint8_t status = write_mem(cpu, addr, value & 0xFF);
+    if (status) {
+        return status;
+    }
+    status = write_mem(cpu, addr + 1, (value >> 8) & 0xFF);
+    if (status) {
+        return status;
+    }
+    return 0;
+}
+
+uint8_t write_mem32(CPU *cpu, uint32_t addr, uint32_t value) {
+    uint8_t status = write_mem16(cpu, addr, value & 0xFFFF);
+    if (status) {
+        return status;
+    }
+    status = write_mem16(cpu, addr + 2, (value >> 16) & 0xFFFF);
+    if (status) {
+        return status;
+    }
+    return 0;
+}