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Do some stuff

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This commit is contained in:
Bruno Rybársky
2025-02-18 14:44:08 +01:00
parent 4d3755e2ce
commit 8f46a76fd4
21 changed files with 649 additions and 150 deletions
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42
cpu/core.c
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@@ -7,9 +7,10 @@
#include "string.h"
// Initialize CPU
void init_cpu(CPU *cpu) {
void init_cpu(CPU *cpu, SDL_Renderer *renderer) {
memset(cpu, 0, sizeof(CPU));
cpu->mode = CPU_MODE_HALTED | CPU_MODE_SECOND;
cpu->renderer = renderer;
}
// Helper function for setting flags in the CPU (here we assume bit0 is the Zero flag,
@@ -41,15 +42,15 @@ void step(CPU *cpu) {
oldPC = cpu->pc;
newPC = oldPC;
uint8_t opcode = read_mem(cpu, cpu->pc++);
const uint32_t differenceAlignment = oldPC % CPU_INSTRUCTION_SIZE;
if (differenceAlignment) {
cpu->pc += differenceAlignment;
}
uint8_t opcode = read_mem(cpu, cpu->pc++);
switch (opcode) {
case NOP:
//Don't do anything
@@ -386,7 +387,7 @@ void step(CPU *cpu) {
}
temp |= (1 << bit);
write_reg(cpu, reg1, temp);
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -402,9 +403,10 @@ void step(CPU *cpu) {
if (bit > 7) {
bit = 7;
}
temp &= ~(1 << bit);
write_reg(cpu, reg1, temp);
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -425,7 +427,8 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
cpu->pc -= 2;
break;
}
@@ -439,7 +442,7 @@ void step(CPU *cpu) {
}
temp |= (1 << bit);
write_mem(cpu, addrTemp, temp);
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -454,7 +457,7 @@ void step(CPU *cpu) {
}
temp &= ~(1 << bit);
write_mem(cpu, addrTemp, temp);
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -470,7 +473,8 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
cpu->pc -= 2;
break;
}
@@ -482,7 +486,7 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -499,7 +503,8 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
cpu->pc -= 2;
break;
}
@@ -515,7 +520,8 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
cpu->pc -= 2;
break;
}
@@ -526,7 +532,7 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -537,7 +543,7 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -548,7 +554,7 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -559,7 +565,7 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}
@@ -570,7 +576,7 @@ void step(CPU *cpu) {
cpu->pc = newPC;
break;
}
cpu->pc += CPU_INSTRUCTION_SIZE;
//cpu->pc += CPU_INSTRUCTION_SIZE;
break;
}