jake/SplitBit-Emulator
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Improved debug display.

Browse Source 
Bug fixes: POPD and POPP now pull bytes from the stack in proper order.
This commit is contained in:
Anachronaut
2024-10-18 18:01:23 -04:00
committed by GitHub
parent ffac4c2c0a
commit 4deb56953d
4 changed files with 98 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files
Source/cpu.c
+2 -2
View File
@@ -206,18 +206,18 @@ uint8_t executeOperation(uint8_t Instruction, CPURegisters *cpu) {
break;
case 0x37:
// POPP - Pop Data to the Program Counter
cpu->StackPointer++;
cpu->ProgramCounter = (uint16_t)cpu->Data[cpu->StackPointer] << 8;
cpu->StackPointer++;
cpu->ProgramCounter = cpu->ProgramCounter | (uint16_t)cpu->Data[cpu->StackPointer];
cpu->ProgramCounter += 3; // Because it needs to skip over the subsequent branch instruction on return.
cpu->StackPointer++;
break;
case 0x38:
// POPD - Pop Data to the Data Pointer
cpu->StackPointer++;
cpu->DataPointer = (uint16_t)cpu->Data[cpu->StackPointer] << 8;
cpu->StackPointer++;
cpu->DataPointer |= (uint16_t)cpu->Data[cpu->StackPointer];
cpu->StackPointer++;
break;
//
// 4x - Data Operations: