LODERUNNER on the ZX81

[Paul]

(PS I tried to reply to your PM, but the reply is sitting in my Outbox with no apparent way to actually send it.)

It's sent. It stays in the outbox until the recipient reads it.

[dr beep]

Since the character is inverted you could invert the UDG too and it will show the inverted inverted UDG, the right character.

[JohnsBargs]

But it's only inverted half the time.

[dr beep]

At request I decided to release the sources of LODERUNNER.

In the ZIP-file are 6 files:
2x sources for levels 1-75 and 76-150
2x textfile with compressed leveldata
2x CALC/EXCEL with levels in ASCII and a macro to create the compressed leveldata

LODERUN-ZX81.zip

(177.96 KiB) Downloaded 43 times

The compression can have 18 repeating tokens on the screen in just 1 byte.
First bit is a possible repeater, then 3 bits make the token. Second nibble is the repeater.

[joaopa]

Dr Beep,

thank you for sharing such a beautiful piece of code.