Technical Analysis

Technical Analysis

The full 3,193-line technical analysis is in docs/TECHNICAL_ANALYSIS.md in the repository.

Summary

Executable

• Original: BTECH.EXE (packed)
• Unpacked: UNBTECH.EXE (MS-DOS 16-bit Real Mode, MZ executable)
• Compiler: Microsoft C 5.0
• Code segments: 23 segments covering game loop, combat, rendering, BLD interpreter

Combat System

• Turn-based, 24 unit slots (4 player + 8 infantry + 12 enemy mechs)
• 2D6 to-hit resolution with skill, terrain, heat, and story modifiers
• 8-direction ray-cast Line of Sight
• Twin 12×24 fog of war grids
• Heat system (cap 30), ammo tracking (10 bins per mech)
• AI target selection via story state property scanning

Story System

• 3-layer state machine: D30C[256] generic state + story properties + milestone flags
• Story dispatcher at 1000:0D10 with 100+ story indices
• 26 BLD script files drive all interactions

World Map

• 64×64 tile grid (93 tile types)
• 2048-byte bit-packed visibility (128×128)
• 15 local maps (MAP1-15.MTP)
• 22 location entries mapped to BLD scripts

Memory Map

• Full address reference (1035 lines) in docs/ADDRESS_REFERENCE.md
• Memory layout in docs/MEMORY_MAP.md