Debug Overlay Module (shachi_debug.h/c)

Reusable. Drop into any KOS project.

shachi_debug_init();
shachi_debug_toggle(buttons);  // L+R toggle
shachi_debug_draw();           // Renders if enabled

Reads 10 PVR2 registers via PVR_GET(): - TA_OPB_POS (0x0134), TA_OPB_END (0x012C), TA_VERTBUF_POS (0x0138) - ISP_FEED_CFG (0x00A0), BGPLANE_Z (0x0088) - FOG_DENSITY (0x00B8), FOG_TABLE_COLOR (0x00B0) - CHEAP_SHADOW (0x0074), OBJECT_CLIP (0x0078), SYNC_STATUS (0x010C)

Menu System

SHACHI-PROBE v0.1
> [1] Near-Z Clipping    (DIV-001)
  [2] Depth Precision    (DIV-002)
  [3] Twiddle Bit Order  (DIV-003)
  [4] Transparency Sort  (DIV-004)
  [5] OPB Overflow       (DIV-005)
  [6] Performance        (DIV-007)
  [7] Mixed Submission   (DIV-008)
  [D] Debug Overlay      (Toggle)
  A=Select  B=Back  START=Exit