Banks

AMOS Professional stores all multimedia assets — sprites, music, samples, images, animations — in memory bank files ( .Abk). Multiple banks can be bundled into a bank set file (.Abs).

Portamos can export any bank to a JSON metadata file and associated data files in modern formats, and reassemble them back into binary bank files.

Workflow

# Export a bank to JSON + data files
portamos disasm input.Abk output/mybank.json

# Edit JSON / data files with any tool you like ...

# Reassemble back to binary
portamos asm output/mybank.json output.Abk

The "type" field in the JSON determines which reader/writer is used. All JSON files also carry "bankNumber" and "chipRam" at the top level.

Comments in JSON files

Portamos reads JSON with // and /* */ comments enabled. You can annotate any field or section in your bank JSON files:

{
  "type": "Samples",
  "bankNumber": 1,
  "chipRam": true,
  "samples": [
    // First sample: main theme loop
    {
      "name": "Theme",
      "frequencyHz": 8363,
      // Amiga standard tuning
      "file": "samples-sample000.wav"
    }
  ]
}

Comments are stripped before parsing and are never written back by disasm.

Supported bank types

Type	JSON "type"	Description
Sprite / Icon	Sprite / Icon	Sprite or icon bank with palette
Sample	Samples	8-bit PCM samples with name and frequency
Pac.Pic	PacPic	Compressed Amiga screen image
AMAL	Amal	AMAL animation scripts and movement recordings
Tracker	Tracker	ProTracker / MOD file
Resource	Resource	Sprites + palette + optional AMUI programs
Music	Music	AMOS tracker: instruments, songs and patterns
Menu	Menu	AMOS menu definitions
Work / Data	Work / Data	Raw binary data banks