Tut's Tomb (Win16, Entertainment Pack 2)

Registry id wep16_tutstomb: test/binaries/wep16/WEP2/TUTSTOMB.EXE (uses WEPUTIL). Pyramid solitaire: remove pairs that sum to 13; a King goes on its own. Main window class TUTSTOMB, wndproc seg 1:0x254, created 616x440 at (10,20); a Stat child (status bar) at the bottom shows Time and the $ score. DS base in the arena is 0x110000 (DS:0x0f40 = 0x110f40).

Window procedure map (seg 1)

• Message switch at 1:0xe6e. A jump table at 1:0xe8a covers messages 1..0x14: WM_CREATE goes to 0xa4c and WM_SIZE goes to 0xb62.
• Above 0x20 the switch compares one by one: 0x111 goes to 0x388, 0x200 (mousemove) to 0xa5c, 0x201 (lbuttondown) to 0xdd6, and 0x204 to 0xdc6. WM_LBUTTONUP is not handled.
• WM_SIZE stores cx-1 at DS:0xf02 and cy-1 at DS:0xf04, and nothing else. This is the only place the game learns its client size.
• WM_LBUTTONDOWN returns at once if DS:0xee2 is nonzero. Otherwise it calls 1:0x2c0c(hwnd), which takes no coordinates: it acts on the card the WM_MOUSEMOVE handler last hovered (DS:0xc56 / 0xd74). A click with no mousemove before it does nothing.

Fixed 2026-10-10: pyramid laid out at x = -35

The board drew with its apex at x=-35 and the right pile at x=-81, i.e. as if the client were 0 px wide, and it stayed that way. Win16 ShowWindow posted the main window's first WM_SIZE; USER sends it from inside ShowWindow, and the game lays out the pyramid in the UpdateWindow that follows, before the queue runs. Win16 ShowWindow now sends that size (SIZE_RESTORED) through its synchronous show continuation. The case is in test/test-win16-windowpos-defproc.js.

Route (headless, default batch size)

node test/run.js --app=wep16_tutstomb --stuck-after=0 --no-close \
  --input=396:mousemove:530:355,398:mousemove:535:358,400:mousedown:535:358,404:mouseup:535:358,460:png:/tmp/t.png

The deal is up by batch ~390. In this deterministic deal the bottom-right card is K♠: hovering and clicking it moves it to the discard pile, and the score goes from -37 to -24. Evidence: scratch/runs/20261010T1120Z-wep16_tutstomb-wmsize-fix-w6.