diff --git a/doc/4-instrument/README.md b/doc/4-instrument/README.md
index 7ab7898ec..c14b6bd5e 100644
--- a/doc/4-instrument/README.md
+++ b/doc/4-instrument/README.md
@@ -15,7 +15,7 @@ depending on the instrument type, there are many different types of instrument e
 - [SAA1099](saa.md) - for use with Philips SAA1099 PSG sound source.
 - [TIA](tia.md) - for use with Atari 2600 chip.
 - [AY-3-8910](ay8910.md) - for use with AY-3-8910 PSG sound source and SSG portion in YM2610.
-- [Amiga / sample](amiga.md) for controlling Amiga and other sample based synthsizers like YM2612's Channel 6 PCM mode, NES channel 5, Sega PCM, X1-010 and PC Engine's sample playback mode.
+- [Generic Sample](amiga.md) for controlling Amiga and other sample based synthsizers like YM2612's Channel 6 PCM mode, NES channel 5, Sega PCM, X1-010 and PC Engine's sample playback mode.
 - [Atari Lynx](lynx.md) - for use with Atari Lynx handheld console.
 - [VERA](vera.md) - for use with Commander X16 VERA.
 - [Seta/Allumer X1-010](x1_010.md) - for use with Wavetable portion in Seta/Allumer X1-010.
@@ -24,6 +24,7 @@ depending on the instrument type, there are many different types of instrument e
 - [Konami VRC6](vrc6.md) - for use with VRC6's PSG sound source.
 - [SNES](snes.md) - for use with SNES S-APU.
 - [Casio PV-1000](pv1000.md) - for use with Casio PV-1000.
+- [C140](c140.md) for use with Namco C140.
 
 
 # macros
diff --git a/doc/4-instrument/amiga.md b/doc/4-instrument/amiga.md
index 3d7a606f9..4799d7cf3 100644
--- a/doc/4-instrument/amiga.md
+++ b/doc/4-instrument/amiga.md
@@ -1,17 +1,18 @@
 # Amiga/PCM sound source instrument editor
 
-The PCM instrument editor consists of a sample selector and several macros:
+The Generic Sample instrument editor consists of a sample selector and several macros:
 
-# Amiga/sample
+# Sample
 
 - **Initial sample**: specifies which sample should be assigned to the instrument, or the first one in the sequence
+- **Use sample map**: enables mapping different samples to notes.
 
 # Macros
 
-- **Volume**: volume sequence. _warning:_ it works only on Amiga system, as of version 0.5.5!
-- **Arpeggio**: pitch sequence
-- **Waveform**: sample sequence
-- **Panning (left)**: output level for left channel
-- **Panning (right)**: output level for right channel
-- **Pitch**: fine pitch
-- **Phase Reset**: trigger restart of waveform
\ No newline at end of file
+- **Volume**: volume sequence. does not apply to some chips.
+- **Arpeggio**: pitch sequence.
+- **Waveform**: waveform sequence.
+- **Panning (left)**: output level for left channel.
+- **Panning (right)**: output level for right channel.
+- **Pitch**: fine pitch.
+- **Phase Reset**: trigger restart of waveform.
\ No newline at end of file
diff --git a/doc/4-instrument/c140.md b/doc/4-instrument/c140.md
new file mode 100644
index 000000000..50d20d3e9
--- /dev/null
+++ b/doc/4-instrument/c140.md
@@ -0,0 +1,17 @@
+# Namco C140 instrument editor
+
+the Namco C140 instrument editor consists of a sample selector and several macros:
+
+# Sample
+
+- **Initial sample**: specifies which sample should be assigned to the instrument, or the first one in the sequence.
+- **Use sample map**: enables mapping different samples to notes.
+
+# Macros
+
+- **Volume**: volume sequence.
+- **Arpeggio**: pitch sequence.
+- **Panning (left)**: output level for left channel.
+- **Panning (right)**: output level for right channel.
+- **Pitch**: fine pitch.
+- **Phase Reset**: trigger restart of sample.
\ No newline at end of file
diff --git a/doc/7-systems/README.md b/doc/7-systems/README.md
index 53be263ea..367ca9d83 100644
--- a/doc/7-systems/README.md
+++ b/doc/7-systems/README.md
@@ -83,6 +83,7 @@ this is the full list of chips that Furnace supports.
 - [MSM6258](msm6258.md)
 - [MSM6295](msm6295.md)
 - [Namco 163](n163.md)
+- [Namco C140](c140.md)
 - [Namco WSG/C15/C30](namco.md)
 - [HuC6280](pce.md)
 - [PC Speaker](pcspkr.md)