<div style="border: 1px solid rgb(228, 222, 222); margin: 0px 0px 5px; padding: 0.5em 1em; background-color: rgb(249, 249, 249);"><center>'''''This artikel article originally came from Kevin Thackers' archive at [http://www.cpctech.org.uk http://www.cpctech.org.uk].''''' </center></div>
= Tape-Image (.CDT) file format (Amstrad specific) =
NOTE: All timings are in Spectrum T-States.
=== ID:10 - Standard speed data block ===
This block MUST be supported and CAN exist in a CDT. Emulators should use standard Spectrum ROM timings for playback.
=== ID:11 - Turbo Loading Data Block ===
This block MUST be supported and CAN exist in a CDT.
Details and functionality of this block are the same as described in the official TZX/CDT specification.
=== ID:13 - Sequence of pulses of different length ===
This block MUST be supported and CAN exist in a CDT.
Details and functionality of this block are the same as described in the official TZX/CDT specification.
=== ID:14 - Pure Data Block ===
This block MUST be supported and CAN exist in a CDT.
Details and functionality of this block are the same as described in the official TZX/CDT specification.
=== ID:15 - Direct Recording ===
This block MUST be supported but SHOULD be avoided when creating a CDT by a sample-to-CDT converter. This block can be used by emulators to support writing to CDTs.
Details and functionality of this block are the same as described in the official TZX/CDT specification.
=== ID : 20 - Pause (Silence) or `Stop the Tape' Command ===
When the pause is defined as "0" an Amstrad emulator SHOULD NOT 'Stop the Tape', but this value should be treated as "no pause".
=== ID:2A - Stop tape if in 48K Mode ===
This block is Spectrum specific.
This block MUST NOT be added to a new CDT. Amstrad emulator's MUST ignore this block, and it MUST NOT have any effect. There will not be a pause, and the tape must not stop.
=== ID: 33 - Hardware Type ===
Hardware types of 0x01 (External Storage) to 0x0f (EPROM programmers) MUST not be added to a new CDT. These types ONLY apply to the Spectrum. Hardware type 0x00 (Computers) CAN be used but only as a guideline.
=== ID:34 - Emulation Info ===
This block is Spectrum specific.
This block MUST not be added to a new CDT. Amstrad emulator's MUST ignore this block.
=== ID:40 - Snapshot block ===
This block is Spectrum specific.