From b9fced46cd2b5f07ce7be586055a5accc6fca6e4 Mon Sep 17 00:00:00 2001
From: Lucas Scharenbroich <lscharen@prowestgis.com>
Date: Tue, 10 Aug 2021 07:58:09 -0500
Subject: [PATCH] Debugging overlay to show variables on screen

---
 src/Overlay.s | 101 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 src/Overlay.s

diff --git a/src/Overlay.s b/src/Overlay.s
new file mode 100644
index 0000000..462fbbe
--- /dev/null
+++ b/src/Overlay.s
@@ -0,0 +1,101 @@
+; Put a single-line overlay to display status information
+Overlay
+:top         equ   16
+             ldy   #$2222
+
+             lda   #TopLabel
+             ldx   #{160*:top+4}
+             jsr   DrawString
+             ldx   #{160*:top+12}
+             lda   LastTop
+             jsr   DrawWord
+
+             lda   #BottomLabel
+             ldx   #{160*:top+32}
+             jsr   DrawString
+             ldx   #{160*:top+40}
+             lda   LastBottom
+             jsr   DrawWord
+
+             lda   #LeftLabel
+             ldx   #{160*:top+60}
+             jsr   DrawString
+             ldx   #{160*:top+68}
+             lda   LastLeft
+             jsr   DrawWord
+
+             lda   #RightLabel
+             ldx   #{160*:top+88}
+             jsr   DrawString
+             ldx   #{160*:top+96}
+             lda   LastRight
+             jsr   DrawWord
+
+
+             lda   #XLabel
+             ldx   #{160*{:top+8}+4}
+             jsr   DrawString
+             ldx   #{160*{:top+8}+12}
+             lda   StartX
+             jsr   DrawWord
+
+             lda   #XModLabel
+             ldx   #{160*{:top+8}+32}
+             jsr   DrawString
+             ldx   #{160*{:top+8}+40}
+             lda   StartXMod164
+             jsr   DrawWord
+
+             lda   #YLabel
+             ldx   #{160*{:top+8}+60}
+             jsr   DrawString
+             ldx   #{160*{:top+8}+68}
+             lda   StartY
+             jsr   DrawWord
+
+             lda   #YModLabel
+             ldx   #{160*{:top+8}+88}
+             jsr   DrawString
+             ldx   #{160*{:top+8}+96}
+             lda   StartYMod208
+             jsr   DrawWord
+
+
+             lda   #DirtyLabel
+             ldx   #{160*{:top+16}+4}
+             jsr   DrawString
+             ldx   #{160*{:top+16}+12}
+             lda   DirtyBits
+             jsr   DrawWord
+
+             lda   #STWLabel
+             ldx   #{160*{:top+16}+32}
+             jsr   DrawString
+             ldx   #{160*{:top+16}+48}
+             lda   ScreenTileWidth
+             jsr   DrawWord
+
+             lda   #STHLabel
+             ldx   #{160*{:top+16}+68}
+             jsr   DrawString
+             ldx   #{160*{:top+16}+84}
+             lda   ScreenTileHeight
+             jsr   DrawWord
+
+             rts
+
+TopLabel     str   'T:'
+BottomLabel  str   'B:'
+RightLabel   str   'R:'
+LeftLabel    str   'L:'
+
+XLabel       str   'X:'
+YLabel       str   'Y:'
+XModLabel    str   'X*'
+YModLabel    str   'Y*'
+
+DirtyLabel   str   'D:'
+STWLabel     str   'STW:'
+STHLabel     str   'STH:'
+
+