PRINT_A
Write A to current output channel
Categories:
| Function | Address | Description |
|---|---|---|
| RST_2 | 0010 | Print A to the output stream |
RST 2 is usually used to write to the current channel, usually the screen.
Internally, RST 2 calls the routine in the CHURCHL vector,
returning with all registers preserved unless an error occurred.
Implementing custom channels
Because the rom code uses the CHURCHL vector you can easily replace the
current output channel with your own code.
My Teletext emulator does this to allow code to write to the new screen using RST 2.
Last modified November 4, 2021: Add initial OS API calls (c7bd5ac)