diff --git a/README.md b/README.md
index 3f38972e..f34486ac 100644
--- a/README.md
+++ b/README.md
@@ -147,6 +147,7 @@ choices because they can store multiple types of file system.
 | [`ti99`](doc/disk-ti99.md) | TI-99: 90kB 35-track SSSD | 🦖 |  |  |
 | [`tids990`](doc/disk-tids990.md) | Texas Instruments DS990: 1126kB 8" DSSD | 🦖 | 🦖 |  |
 | [`tiki`](doc/disk-tiki.md) | Tiki 100: CP/M |  |  | CPMFS  |
+| [`trs80`](doc/disk-trs80.md) | : TRS-80 88kB 5.25" 35-track 10-sector SSSD |  |  |  |
 | [`victor9k`](doc/disk-victor9k.md) | Victor 9000 / Sirius One: 1224kB 5.25" DSDD GCR | 🦖 | 🦖 |  |
 | [`zilogmcz`](doc/disk-zilogmcz.md) | Zilog MCZ: 320kB 8" 77-track SSSD hard-sectored | 🦖 |  | ZDOS  |
 {: .datatable }
diff --git a/build.py b/build.py
index bb626049..5ea498e6 100644
--- a/build.py
+++ b/build.py
@@ -72,6 +72,10 @@
         ("rx50", "", ""),
         ("tartu", "", "--390 --drivetype=40"),
         ("tartu", "", "--780"),
+        ("trs80", "", "--88 --drivetype=40"),
+        ("trs80", "", "--100 --drivetype=40"),
+        ("trs80", "", "--175 --drivetype=40"),
+        ("trs80", "", "--200 --drivetype=40"),
         ("tids990", "", ""),
         ("victor9k", "", "--612"),
         ("victor9k", "", "--1224"),
diff --git a/doc/disk-trs80.md b/doc/disk-trs80.md
new file mode 100644
index 00000000..ff26d4d6
--- /dev/null
+++ b/doc/disk-trs80.md
@@ -0,0 +1,31 @@
+trs80
+====
+## TRS-80 88kB 5.25" 35-track 10-sector SSSD
+<!-- This file is automatically generated. Do not edit. -->
+
+Insert documentation here.
+
+## Options
+
+  - Format variants:
+      - `88`: 87.5kB SSSD 35-track
+      - `100`: 100kB SSSD 40-track
+      - `175`: 175kB SSDD 35-track
+      - `200`: 200kB SSDD 40-track
+
+## Examples
+
+To read:
+
+  - `fluxengine read -c trs80 --88 -s drive:0 -o trs80.img`
+  - `fluxengine read -c trs80 --100 -s drive:0 -o trs80.img`
+  - `fluxengine read -c trs80 --175 -s drive:0 -o trs80.img`
+  - `fluxengine read -c trs80 --200 -s drive:0 -o trs80.img`
+
+To write:
+
+  - `fluxengine write -c trs80 --88 -d drive:0 -i trs80.img`
+  - `fluxengine write -c trs80 --100 -d drive:0 -i trs80.img`
+  - `fluxengine write -c trs80 --175 -d drive:0 -i trs80.img`
+  - `fluxengine write -c trs80 --200 -d drive:0 -i trs80.img`
+
diff --git a/src/formats/build.py b/src/formats/build.py
index 99f0591e..73f6862a 100644
--- a/src/formats/build.py
+++ b/src/formats/build.py
@@ -37,6 +37,7 @@
     "ti99",
     "tids990",
     "tiki",
+    "trs80",
     "victor9k",
     "zilogmcz",
 ]
diff --git a/src/formats/trs80.textpb b/src/formats/trs80.textpb
new file mode 100644
index 00000000..276e133a
--- /dev/null
+++ b/src/formats/trs80.textpb
@@ -0,0 +1,177 @@
+comment: 'TRS-80 88kB 5.25" 35-track 10-sector SSSD'
+
+documentation:
+<<<
+Insert documentation here.
+>>>
+
+image_reader {
+	filename: "trs80.img"
+	img {}
+}
+
+image_writer {
+	filename: "trs80.img"
+	img {}
+}
+
+encoder {
+	ibm {}
+}
+
+decoder {
+	ibm {}
+}
+
+layout {
+	format_type: FORMATTYPE_40TRACK
+}
+
+option_group {
+	comment: "$formats"
+
+	option {
+		name: "88"
+		comment: "87.5kB SSSD 35-track"
+
+		config {
+			layout {
+				tracks: 35
+				sides: 1
+				layoutdata {
+					sector_size: 256
+					physical {
+						start_sector: 0
+						count: 10
+					}
+				}
+			}
+
+			encoder {
+				ibm {
+					trackdata {
+						target_rotational_period_ms: 167
+						target_clock_period_us: 3.333
+						emit_iam: false
+						use_fm: true
+						gap0: 0x10
+						gap2: 0x09
+						gap3: 0x10
+						idam_byte: 0xf57e
+						dam_byte: 0xf56f
+						gap_fill_byte: 0xffff
+					}
+				}
+			}
+		}
+	}
+
+	option {
+		name: "100"
+		comment: "100kB SSSD 40-track"
+
+		config {
+			layout {
+				tracks: 40
+				sides: 1
+				layoutdata {
+					sector_size: 256
+					physical {
+						start_sector: 0
+						count: 10
+					}
+				}
+			}
+
+			encoder {
+				ibm {
+					trackdata {
+						target_rotational_period_ms: 167
+						target_clock_period_us: 3.333
+						emit_iam: false
+						use_fm: true
+						gap0: 0x10
+						gap2: 0x09
+						gap3: 0x10
+						idam_byte: 0xf57e
+						dam_byte: 0xf56f
+						gap_fill_byte: 0xffff
+					}
+				}
+			}
+		}
+	}
+
+	option {
+		name: "175"
+		comment: "175kB SSDD 35-track"
+
+		config {
+			layout {
+				tracks: 35
+				sides: 1
+				layoutdata {
+					sector_size: 512
+					physical {
+						start_sector: 0
+						count: 10
+					}
+				}
+			}
+
+			encoder {
+				ibm {
+					trackdata {
+						target_rotational_period_ms: 167
+						target_clock_period_us: 3.333
+						emit_iam: false
+						gap0: 80
+						gap2: 22
+						gap3: 34
+					}
+					trackdata {
+						track: 17
+						dam_byte: 0xf56e
+					}
+				}
+			}
+		}
+	}
+
+	option {
+		name: "200"
+		comment: "200kB SSDD 40-track"
+
+		config {
+			layout {
+				tracks: 40
+				sides: 1
+				layoutdata {
+					sector_size: 512
+					physical {
+						start_sector: 0
+						count: 10
+					}
+				}
+			}
+
+			encoder {
+				ibm {
+					trackdata {
+						target_rotational_period_ms: 167
+						target_clock_period_us: 3.333
+						emit_iam: false
+						gap0: 80
+						gap2: 22
+						gap3: 34
+					}
+					trackdata {
+						track: 17
+						dam_byte: 0xf56e
+					}
+				}
+			}
+		}
+	}
+}
+