ROM memory that contains information about the Tiny Tapeout chip. The ROM is 8-bit wide and 128 bytes long.
The ROM layout is as follows:
| Address | Length | Encoding | Description |
|---|---|---|---|
| 0 | 8 | 7-segment | Shuttle name (e.g. "tt04"), null-padded |
| 32 | 96 | ASCII | Chip descriptor (see below) |
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 | tt04 |
| repo | The name of the repository | TinyTapeout/tinytapeout-04 |
Future Tiny Tapeout shuttles may add more keys to the chip descriptor.
Here is a complete example of a chip descriptor:
shuttle=tt04
repo=TinyTapeout/tinytapeout-04
Read the ROM contents by setting the address pins and reading the data pins. The first eight bytes of the ROM are 7-segment encoded and contain the shuttle name. You can read them by toggling the first four DIP switches and observing the on-board 7-segment display.
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | addr[0] | data[0] | |
| 1 | addr[1] | data[1] | |
| 2 | addr[2] | data[2] | |
| 3 | addr[3] | data[3] | |
| 4 | addr[4] | data[4] | |
| 5 | addr[5] | data[5] | |
| 6 | addr[6] | data[6] | |
| 7 | addr[7] | data[7] |