1 files changed, 68 insertions, 0 deletions
diff --git a/toolbox/toolbox.go b/toolbox/toolbox.go
new file mode 100644
index 0000000..535fe9f
--- /dev/null
+++ b/toolbox/toolbox.go
@@ -0,0 +1,68 @@
+// SPDX-FileCopyrightText: 2026 Terin Stock <terinjokes@gmail.com>
+// SPDX-License-Identifier: EUPL-1.2
+
+package toolbox
+
+import (
+	"strings"
+)
+
+const (
+	TOOLBOX_COUNT_CDS    = 0xDA
+	TOOLBOX_LIST_CDS     = 0xD7
+	TOOLBOX_SET_NEXT_CD  = 0xD8
+	TOOLBOX_LIST_DEVICES = 0xD9
+)
+
+// FileType represents the type of file in a [FileEntry].
+type FileType uint8
+
+const (
+	File FileType = iota
+	Directory
+)
+
+// DeviceType represents the type of emulated device.
+type DeviceType uint8
+
+const (
+	Fixed DeviceType = iota
+	Removeable
+	Optical
+	Floppy14MB
+	MO
+	Sequential
+	Network
+	Zip100
+
+	None DeviceType = 0xFF
+)
+
+// FileEntry describes each file recognized by the ODE as
+// emulatable media.
+type FileEntry [40]byte
+
+// Index is the file's index, to be used with [Device.SetCDByIndex].
+func (e *FileEntry) Index() int {
+	return int(e[0])
+}
+
+// FileType returns the entry's file type.
+func (e *FileEntry) FileType() FileType {
+	return FileType(e[1])
+}
+
+// Name is the entry's name, truncated to 32 characters.
+func (e *FileEntry) Name() string {
+	str := string(e[2:35])
+	idx := strings.IndexByte(str, 0)
+	if idx < 0 {
+		idx = 33
+	}
+	return str[:idx]
+}
+
+// Size returns the size of the entry in bytes.
+func (e *FileEntry) Size() uint64 {
+	return uint64(e[36])<<24 | uint64(e[37])<<16 | uint64(e[38])<<8 | uint64(e[39])
+}