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Initial commit: bt411 -- standalone Windows BattleTech (Tesla 4.10 port)

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Clean, self-contained extraction of the BattleTech-specific work from the
reverse-engineering workspace -- engine + game + content + build, with nothing
from Red Planet or the raw archive dumps. Builds green (Win32) and runs the
single-player drive->animate->target->fire->damage->destroy loop out of the box.

Layout:
  engine/   MUNGA + MUNGA_L4 shared 2007 engine, carrying our BT render/loader
            work (bgfload/L4D3D/L4VIDEO: BSL bit-slice decode, LOD/ground/shadow
            models) + image codec; the minimal rp/ headers the audio HAL needs
  game/     reconstructed BT logic + surviving-original BT source + fwd shims
            + WinMain launcher
  content/  full runtime tree (BTL4.RES, VIDEO/, GAUGE/, AUDIO/, eggs, BTDPL.INI)
  docs/     format specs + reconstruction ledgers
  reference/ raw Ghidra pseudocode (recon source-of-truth) + decomp exporter
  tools/    MP console emulator + map/resource scanners

One top-level CMake builds munga_engine lib + bt410_l4 game lib + btl4.exe.
All paths relativized (186 fwd shims + ~437 CMake abs paths -> repo-relative);
DXSDK is the one external, overridable via -DDXSDK. Verified: builds to a
byte-identical 2.27MB exe and runs combat (TARGET DESTROYED, 0 crashes) against
the bundled content.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
arcattack
2026-07-05 21:03:40 -05:00
co-authored by Claude Opus 4.8
commit 7b7d465e5e
4192 changed files with 604371 additions and 0 deletions
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engine/MUNGA_L4/L4TIME.cpp
+162
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#include "mungal4.h"
#pragma hdrstop
#include "l4time.h"
//#include <bios.h>
//#include <sos.h>
#include <intrin.h>
#include <windows.h>
//#############################################################################
//########################### System Clock ##############################
//#############################################################################
SystemClock SystemClock::timer;
long SystemClock::ticksPerSecond;
__int64 SystemClock::perfCounterFreq;
//RB 1/20/07
//volatile long fast_time = 0L;
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
//void outportb(short portid, unsigned char value)
//{
// __asm
// {
// MOV DX, portid
// MOV AL, value
// OUT DX, AL
// }
// __outbyte(portid, value);
//}
////~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
////
//unsigned char inportb(short portid)
//{
// unsigned char retVal;
// __asm
// {
// MOV DX, portid
// IN AL, DX
// MOV retVal, AL
// }
// return retVal;
//}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
/*TIME RB 1/20/07
void Timer_Handler()
{
++fast_time;
}*/
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
long SystemClock::GetRTC()
{
LARGE_INTEGER count;
QueryPerformanceCounter(&count);
return (long)((count.QuadPart * (__int64)1000) / SystemClock::perfCounterFreq);
}
double SystemClock::GetHiRes()
{
LARGE_INTEGER count;
QueryPerformanceCounter(&count);
return (count.QuadPart / (double)SystemClock::perfCounterFreq);
}
__int64 SystemClock::GetHiResTicks()
{
LARGE_INTEGER count;
QueryPerformanceCounter(&count);
return count.QuadPart;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
SystemClock::SystemClock()
{
//
//-------------------------------
// Initialize the timer variables
//-------------------------------
//
pauseStart = 0;
pauseTime = 0;
//
//------------------------------
// Initialize the platform timer
//------------------------------
//
// query the performance counter for its frequency
LARGE_INTEGER freq;
QueryPerformanceFrequency(&freq);
//SystemClock::ticksPerSecond = freq.QuadPart;
SystemClock::perfCounterFreq = freq.QuadPart;
SystemClock::ticksPerSecond = 1000L;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
void SystemClock::Shutdown()
{
/*STUBBED: TIME RB 1/20/07
if (timer_handler_handle != 0xFFFF)
{
#if DEBUG_LEVEL>0
WORD err = sosTIMERRemoveEvent(timer_handler_handle);
Verify(err == _ERR_NO_ERROR);
err = sosTIMERUnInitSystem(0);
Verify(err == _ERR_NO_ERROR);
#else
sosTIMERRemoveEvent(timer_handler_handle);
sosTIMERUnInitSystem(0);
#endif
}
*/
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
#define TIMER_CONTROL 0x43
#define GET_TIMER0 0xC2
#define TIMER0_PORT 0x40
#define OUTPUT_BIT 0x80
#undef inportb
#undef outportb
float Get_Frame_Percent_Used()
{
//STUBBED: SOS RB 1/14/07
///* RB 1/11/07
//outportb(TIMER_CONTROL, GET_TIMER0);
//int half = inportb(TIMER0_PORT) & OUTPUT_BIT;
//int subtick = ((int)inportb(TIMER0_PORT)) >> 1;
//subtick += (((int)inportb(TIMER0_PORT)) << 7);
//*/
//__outbyte(TIMER_CONTROL, GET_TIMER0);
//int half = __inbyte(TIMER0_PORT) & OUTPUT_BIT;
//int subtick = ((int)__inbyte(TIMER0_PORT)) >> 1;
//subtick += (((int)__inbyte(TIMER0_PORT)) << 7);
//if (timer_handler_handle == 0xFFFF)
//{
// subtick += half << 8;
// return (65535 - subtick) / 65536.0f;
//}
//else
//{
// if (half)
// {
// subtick += _wTIMERValue >> 1;
// }
// return (_wTIMERValue - 1 - subtick) / (float)_wTIMERValue;
//}
return 0.0f;
}