Sinclair ZX80 / ZX81 / Z88 Forums

Name of Software: ZX80 Space Rescue v1/v1.1
Author: Donkeysoft
Release Date: 2017-04-17
Requirements: Original 4K ROM, 2K or more of extra RAM
Description: A game based on Intergalactic Space Rescue, originally released in 2013 for the 16K Sinclair ZX Spectrum and later ported to the ZX81 + 16K. The signal works opposite to the ZX Spectrum original game in that the signal range has to reach zero for you to successfully find the ship.

V1.1 has some improvements in the movement to keep the ship in bounds of the play area preventing movement onto the row above or below if the player's ship is placed on the first or last column of the row.
Download link: See below
Freeware release.
Link to Discussion thread: Not necessary as no one is that interested in ZX80 software

Name of Software: ZX80 Space Rescue 1K
Author: Donkeysoft
Release Date: 2017-04-17 (v1), 2017-04-18 (v1.1)
Requirements: Unexpanded ZX80, 4K ROM
Description: A game based on Intergalactic Space Rescue, originally released in 2013 for the 16K Sinclair ZX Spectrum and later ported to the ZX81 + 16K. The 1K version has a smaller play area (8x8 rather than 10x10) and has fewer niceties; v1.1 has some further memory savings.
Download link: See below
Freeware release.
Link to Discussion thread: Not necessary as no one is that interested in ZX80 software

Name of Software: Guess The Password (2 Human Players)
Author: Donkeysoft
Release Date: 2017-05-12
Requirements: 2K RAM ZX80, 4K ROM
Description: Player one enters a password (and an optional hint), player two tries to guess it.
Download link: See below
Freeware release.
Link to Discussion thread: Not necessary as no one is that interested in ZX80 software

Name of Software: Quick Fruits [Free edition]
Author: Donkeysoft
Release Date: 2017-12-07
Requirements: 8K RAM ZX80, 4K ROM
Description: A simple Fruit Machine game released as a festive freebie in collaboration with my friends at Monument Microgames
Download link: https://github.com/sbebbers/fruit-machi ... /1.0.0-RC2
Freeware release.
Link to Discussion thread: Not necessary as no one is that interested in ZX80 software development but you can see the GIT repository if you are

Name of Software: Quick Fruits++ [Free edition]
Author: Donkeysoft
Release Date: 2018-01-02
Requirements: 8K RAM ZX80, 4K ROM
Description: A simple Fruit Machine game released as a New Year freebie thanks to Monument Microgames - changed logic from Quick Fruits is that money is banked rather than being automatically added to the running tally. Some other internal improvements as well (meaning re-usable codez).
Download: see attached
Freeware release.
Link to Discussion thread: Not necessary as no one is that interested in ZX80 software development but you can see the GIT repository if you are

Name of Software: Elfbayne
Author: Me (i.e. 4K ROM a.k.a. benkid77)
Release Date: 17/06/2019
Requirements: 16K RAM ZX80 with original 4K ROM
Description: A text adventure in the classic early 8-bit style
Screenshots: Download link (if available for download): Source code: License: Public Domain release
Link to Discussion thread: None presently on this site, however there is a *spoiler* YouTube page at https://www.youtube.com/watch?v=ac5X_3iq3BY showing the full game solution walkthrough if anyone is at all interested.

Name of Software: Mastermind RK
Author: RobertK
Release Date: 08/01/2020
Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 16K
Description: The classic board game "Mastermind"

Your goal is to break a four-digit colour code in as few moves as possible.

Also available for the ZX81.

Download the game and the source from Sourceforge:
https://sourceforge.net/projects/mastermindrk/

Discussion thread is here.

HI! Does anyone know of any 64K games?

gezuci wrote: ↑Thu Apr 01, 2021 10:00 am HI! Does anyone know of any 64K games?

The ZX80 hardware only supports a maximum of 32K RAM: the standard 16K in the 16K-32K region where BASIC programs reside and machine code can run from, and 16K RAM in the 48K-64K region which can only be used to store data. RAM can only be added in the other unused areas of the memory map if the ZX80 is modified to have a /ROMCS line on the expansion bus to allow suppression of the echos of the ROM in those regions. So the largest size game you'll find for the ZX80 is 16K.

FALLZONE for 1K/16K ZX80/ZX81.

(Note this is a dupe of the ZX81 post since this game runs on both machines)

FALLZONE, A simple GPL2 licensed open source machine code game.
This zip file has the source code, "zfall16b.asm" and 4 executables :
ZX81: zfall16-1k.p and zfall16-16k.p
ZX80: zfall16-1k.o and zfall16-16k.o

Note that the source can conditionally compile the same code to ZX80 and ZX81, 1k or 16k!!
(I call it 16k, actually it will run in 2k)

;
; FALLZONE Instructions: use keys QWEADZXC to move yourself (*) around.
; (Imagine a compass around the S key)
; Mines fall every time you move, avoid these.
; Collect 2 out of 3 targets ($) to go to the next level.
; Collect Freezers (F) to halt Mines-falling for a few moves.
; The higher the level, the faster the mines fall.
; The level no (1-9,A-Z) is shown on the top line. (this is the "score")
; The 1k version has a smaller screen, the 2k version uses 32x24.
; What level can you reach? Have fun!
;

Compiled with my favorite small PD z80 assembler (z80asm.c) by Bas Wijnen.
The original BASIC version of this game was written as a test for my own home built ZX81 in 1981.
I used a PD routine for the flicker-free ZX80 display, all the work happens in a long refresh.