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nxtp-js

nxtp-js is a JavaScript implementation of the nxtp library, developed for the ZX Spectrum Next computer. It provides a convenient method for configuring the local time on vintage computers that possess both a Real Time Clock (RTC) and a network interface.

This library is inspired by the original nxtp project for the ZX Spectrum Next.

Installation

To use this project, you need to have Node.js version 18 or higher installed. As an alternative you can use nvm.

git clone https://github.com/syroegkin/nxtp-js.git
nvm use # if you use nvm
npm install
npm run build
npm start

By default, the library listens on port 12300. However, you can configure a different port by setting the environment variable PORT:

PORT=12500 npm start

Alternatively you can use provided docker-compose file:

docker-compose up -d

There is an available pre-built Docker image that you can utilize:

docker pull ghcr.io/syroegkin/nxtp-js:latest

Docker-compose uses this pre-built image by default, but if you wish, you can build it by yourself:

  • Open docker-compose.yml.
  • Comment out the image: line.
  • Uncomment the build: line.

The public time server is available at

On your ZX Spectrum Nextr, you have the option to configure fallback servers. In the event that one server is unavailable, the system will automatically attempt to switch to a backup server.

Your autoexec.bas file may look like this:

   5 REM First server
  10 ON ERROR GO TO 50
  20 .nxtp time.zx.in.net 12300 -z=W.EuropeStandardTime
  30 ON ERROR
  40 GO TO 140
  45 REM Second server
  50 ON ERROR GO TO 90
  55 PAUSE 100
  60 .nxtp time.nxtel.org 12300 -z=W.EuropeStandardTime
  70 ON ERROR
  80 GO TO 140
  85 REM Third server
  90 ON ERROR GO TO 130
  95 PAUSE 100
 100 .nxtp time1.zx.in.net 12300 -z=W.EuropeStandardTime
 110 ON ERROR
 120 GO TO 140
 130 PRINT: PRINT "Can not fetch time"
 140 REM the rest of the code goes here...
9997 GO TO 9999
9998 SAVE "c:/nextzxos/autoexec.bas" LINE 0
9999 ERASE

ZX Spectrum Next is a trademark of SpecNext Ltd.