diff --git a/docs/OUTPUT-INTEGRATION.md b/docs/OUTPUT-INTEGRATION.md
index bac610f..af02e9e 100644
--- a/docs/OUTPUT-INTEGRATION.md
+++ b/docs/OUTPUT-INTEGRATION.md
@@ -80,32 +80,66 @@ lamp per 25 ms** (~40/s). Practical consequences:
 
 ## The plasma display model
 
-The plasma/VFD is a **112 × 32 pixel** text display on its own serial port
-(so text updates never contend with the input link). Two glyph sizes exist:
+The plasma is a **128 × 32 dot-matrix panel** on its own serial port at 9600
+8N1 (so display updates never contend with the input link). It is fully
+dot-addressable: it has a text mode (cursor + fonts + attributes) **and a raw
+bitmap mode** (`ESC P` graphics write — see
+[Bitmap graphics](#bitmap-graphics-esc-p)). The command set is documented in
+vRIO's `VPlasma.Core/Protocol/PlasmaProtocol.cs`, recovered from the Tesla
+4.10 sources and the display firmware dump.
+
+Text mode has two glyph sizes:
 
 | Font | Cell | Fits per line | Auto-selected when |
 |---|---|---|---|
-| large (font 5) | 10×14 px | ~11 chars | text ≤ 9 chars |
-| small (font 2) | 5×7 px | ~22 chars | text 10–20 chars (longer is truncated to 20) |
+| large (font 5) | 10×14 px | ~12 chars | text ≤ 9 chars |
+| small (font 2) | 5×7 px | ~25 chars | text 10–20 chars (longer is truncated to 20) |
 
 What the endpoint exposes (v1):
 
 - **`plasma text <text>`** — auto-fit: short text renders large, longer text
   small, centered on the display (the `PlasmaPosText` behavior the original
-  games used). This is the right default for callsigns, scores, and status
-  words.
-- **`plasma text <x> <y> <text>`** — explicit cursor position in **pixels**
-  (top-left origin). You choose the position; the font still auto-fits by
-  length. Use this to keep two fields on screen at once (e.g. callsign top
-  line, score bottom line: `plasma text 2 2 "VIPER 1-1"` +
-  `plasma text 2 18 "SCORE 4200"`).
+  games used; its pivot is x=56, faithfully a touch left of the true 128-px
+  center). This is the right default for callsigns, scores, and status words.
+- **`plasma text <x> <y> <text>`** — explicit cursor position in **pixels**,
+  top-left origin; the firmware accepts x 0–127, y 0–31. You choose the
+  position; the font still auto-fits by length. Use this to keep two fields on
+  screen at once (e.g. callsign top line, score bottom line:
+  `plasma text 2 2 "VIPER 1-1"` + `plasma text 2 18 "SCORE 4200"`).
 - **`plasma clear`** — blank the display.
 
 Text is **Latin-1** (one byte per char) — don't send UTF-8.
 
-Not exposed through the endpoint yet (the underlying `PlasmaCommands` port has
-them, so they're a small extension when needed): explicit font/attribute
-selection and box draw/fill.
+Not exposed through the endpoint yet (small extensions when needed): explicit
+font/attribute selection, box draw/fill, and the bitmap mode below.
+
+### Bitmap graphics (`ESC P`)
+
+The display accepts **raw bitmap rows** — this is how the native Red Planet
+game draws everything (it renders into a local 1-bpp buffer and streams the
+*changed* rows). The wire command:
+
+```
+ESC P s y x w h data…
+```
+
+`s` = screen (single-screen hardware, ignored), `y` = top row (0–31),
+`x` = left **byte column** (0–15), `w` = bytes per row, `h` = rows, followed
+by `w×h` data bytes, **MSB = leftmost pixel**. The native game always sends
+whole rows: `x=0, w=16, h=1` — 16 bytes covering one full 128-px row.
+
+Budget the bandwidth: a full-frame repaint is 32 rows × (7-byte header +
+16 data bytes) ≈ 740 bytes ≈ **0.77 s** at 9600 baud. That's why the native
+game diffs and streams only changed rows — an animation that touches a few
+rows per tick is smooth; full-frame repaints are ~1 fps. Text mode is far
+cheaper for text; reserve bitmaps for logos, custom gauges, and icons.
+
+Status: the hardware and the vPlasma emulator fully support `ESC P`, but
+RIOJoy's `PlasmaCommands` port and the feedback endpoint don't expose it yet.
+The natural extension is a line command (e.g.
+`plasma row <y> <32-hex-digit row>` or a base64 block form) — if an
+integration needs it, that plus a `PlasmaCommands.GraphicsWrite` builder is a
+small, self-contained addition.
 
 ### Update semantics