Skip to content

WIP restart with the internal debugger's help #31

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Draft
maximilien-noal wants to merge 1 commit into
base: main
Choose a base branch
from
Draft

WIP restart with the internal debugger's help #31

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
56 changes: 39 additions & 17 deletions src/Cryogenic/Overrides/MT32DriverCode.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -1,33 +1,55 @@
namespace Cryogenic.Overrides;

using Spice86.Shared.Emulator.Memory;

using System;

public partial class Overrides {

public void DefineMT32DriverCodeOverrides() {
DefineFunction(0xF000, 0x100, DNMID_entry_00, true, nameof(DNMID_entry_00));
DefineFunction(0xF000, 0x100 + 0x17b, DNMID_entry_01, true, nameof(DNMID_entry_01));
DefineFunction(0xF000, 0x1CB, DNMID_internal_function_00, true, nameof(DNMID_internal_function_00));
DefineFunction(0xF000, 0x100, DNMID_Driver_JumpTable, true, nameof(DNMID_Driver_JumpTable));
DefineFunction(0xF000, 0x01CB, DNMID_internal_function_0xF000_0x1CB, true, nameof(DNMID_internal_function_0xF000_0x1CB));
}

private Action DNMID_entry_01(int arg) {
var result = Alu16.Xor(AX, AX);
if (result == 0) {
return NearJump(0x04);
private Action DNMID_Driver_JumpTable(int arg) {
if(arg == 0) {
NearCall(0xF000, 0x100, DNMID_internal_function_0xF000_0x1CB);
}
Cpu.Out16(0x330, AX);
return NearJump(0x0);
//jmp near ptr 01CBh (E9C800 (3))
//jmp near ptr 0250h (E94A01 (3))
//jmp near ptr 01E1h (E9D800 (3))
//jmp near ptr 023Bh (E92F01 (3))
//jmp near ptr 01EEh (E9DF00(3))
//jmp near ptr 022Bh (E91601 (3))
//jmp near ptr 022Bh (E91601 (3))
return NearRet();
}

private Action DNMID_entry_00(int arg) {
return DNMID_entry_01(0);
//return NearJump(0x17b);
}

/// <summary>
/// Never called...?!
/// </summary>
private Action DNMID_internal_function_0xF000_0x1CB(int arg) {
//push DS
Stack.Push16(DS);
//mov AX,CS
AX = CS;
//mov DS,AX
DS = AX;
//mov AL,DS:[0x0139]
AL = UInt8[new SegmentedAddress(DS, 0x0139)];
//or AL,AL
State.ZeroFlag = (AL == 0);
//jns SHORT 0x033C
if (!State.SignFlag) {
//dec BYTE PTR DS:[0x011E]
UInt16[DS, 0x011E] = Alu16.Dec(UInt16[DS, 0x011E]);
}
//call DS:0x0349
//TODO
NearCall(0xF000, 10, DS_0x0349);
return NearRet();
}

private Action DNMID_internal_function_00(int arg) {
private Action DS_0x0349(int arg) {
return NearRet();
// Implementation of DS:0x0349
}
}