TinyTapeout is an educational project that aims to make it easier and cheaper than ever to get your digital designs manufactured on a real chip.
Go to https://tinytapeout.com for instructions.
ROM memory that contains information about the Tiny Tapeout chip. The ROM is 8-bit wide and 256 bytes long.
The ROM layout is as follows:
| Address | Length | Encoding | Description |
|---|---|---|---|
| 0 | 8 | 7-segment | Shuttle name (e.g. "tt05"), null-padded |
| 8 | 8 | 7-segment | Git commit hash |
| 32 | 96 | ASCII | Chip descriptor (see below) |
| 248 | 4 | binary | Magic value: "TT\xFA\xBB" |
| 252 | 4 | binary | CRC32 of the ROM contents, little-endian |
Other addresses are reserved and should be zero.
The chip descriptor is a simple null-terminated string that describes the chip. Each line is a key-value pair, separated by an equals sign. It contains the following keys:
| Key | Description | Example value |
|---|---|---|
| shuttle | The identifier of the shuttle | tt05 |
| repo | The name of the repository | TinyTapeout/tinytapeout-05 |
| commit | The commit hash * | a1b2c3d4 |
* The commit hash is only included for Tiny Tapeout 5 and later.
Here is a complete example of a chip descriptor:
shuttle=tt05
repo=TinyTapeout/tinytapeout-05
commit=a1b2c3d4
The ROM is automatically generated by tt-support-tools
while building the final GDS file of the chip. Look at the rom.py file in the repository for more details.