API

NextZXOS has two APIs which can be used to make ROM calls.

The NextZXOS API directly descends from the +3DOS API present in the Sinclair ZX Spectrum +2A/+2B/+3, and the IDEDOS API additionally provided with the ZX Spectrum +3e ROMs.

The esxDOS API is compatible with esxDOS 0.8.x, but contains several enhancements.

The latest reference documentation for the APIs is on the distro and Next SD card at c:/docs/NextZXOS/NextZXOS_and_esxDOS_APIs.pdf, and online at gitlab.

The APIs are published and kept up to date for each new NextZXOS and NextBASIC release. Ii Next-specific program, all ROM calls should be made through the APIs. Other code inside the ROM is not documented, and may (and does) move around between releases.