New ZX81 Games

[dr beep]

Name of Software: DESCENDING DOOM 1K
Author: Johan "Dr Beep" Koelman
Release Date: 27/01/2025
Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K lowres
Commercial / Public Domain / Free ware / Other - please specify? Freeware

Description:
Shoot all mould away before it reaches the ground


Villordsutch played the recent released 16K version and I said I could make a 1K version

Downloadlink:

desdo-1k.p

(610 Bytes) Downloaded 91 times

Manual:
255=slowest, 128=fastest
You can set the speed once after loading the game.

Source:

desdo-1k.asm

(7.75 KiB) Downloaded 73 times

[Crayon21]

what assembler did you use? Most don't allow labels if you're using time appropriate ones. I'm guessing Pasmo?

[dr beep]

what assembler did you use? Most don't allow labels if you're using time appropriate ones. I'm guessing Pasmo?

SJASM

[Crayon21]

btw, do you know how to save a file in Zesarux?

[lupoman]

Amazing work!
Your knowledge of the z80/zx81 is beyond belief.

I ported the original C64 Hare Basic version from Robin (https://www.youtube.com/watch?v=PG60q4zWRqk&t=280s) to C (z88dk).
I know the C version has a lot of room for improvement but I tried to be as "close" to the original (code wise) as possible.

Thanks for your port, I'm learning a lot from the source,
Luis.

[dr beep]

Amazing work!
Your knowledge of the z80/zx81 is beyond belief.

I ported the original C64 Hare Basic version from Robin (https://www.youtube.com/watch?v=PG60q4zWRqk&t=280s) to C (z88dk).
I know the C version has a lot of room for improvement but I tried to be as "close" to the original (code wise) as possible.

Thanks for your port, I'm learning a lot from the source,
Luis.

I mentioned in my book that to get the most out of a ZX81 you need to code directly in Z80.
A C-compiler will always create overhead.

To make it fit 1K I could only place the "menu-screen" only at the start.

[dr beep]

Name of Software: Otto Vaijer
Author: Johan "Dr Beep" Koelman
Release Date: 05/02/2025
Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K lowres
Commercial / Public Domain / Free ware / Other - please specify? Freeware

Description:
Try to get all the items before they are hit or time runs out

otto-vaijer.png (5.42 KiB) Viewed 5781 times

Downloadlink:

otto-v.p

(610 Bytes) Downloaded 80 times

Source:

otto-v.asm

(7.3 KiB) Downloaded 64 times

Manual:

Otto Vaijer
-----------
Otto has a machinegun that won't stop firing.
Your job is to secure the items in the room before
any bullit hits the item.

You start with 99 creditpoints.
When a bullit hits an item or
you fail to pick the item in time
you will lose creditpoints.
When the creditpoints become less than
zero it is game over.

Controls:
Q = up
A = down
O = left
P = right
You can also move diagonally.
Newline to (re)start

[ChrisB]

Hello,
Spectacular and addictive, all what a game needs.
Well done, thank you !

[dr beep]

Name of Software: TAXI
Author: Johan "Dr Beep" Koelman
Release Date: 09/02/2025
Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K lowres
Commercial / Public Domain / Free ware / Other - please specify? Freeware

Description:
Pick up guest in your taxi

taxi.png (10.88 KiB) Viewed 5290 times

EDIT: new version with bug solved and more options
Downloadlink:

taxi_2-3.p

(949 Bytes) Downloaded 99 times

Source:

taxi_2-3.asm

(12.78 KiB) Downloaded 79 times

Manual:

TAXI 1K
-------
In this game you play an illegal taxidriver who will pick up clients.
2 normal cabs are driving around and when they get you you lose
5 points of energy. You lose 3 points of energy when
you fail to pick up a guest.
When you pick up a guest you will win the remaining points but also win 1 energypoint

The city has low and high roads. Low roads are normal displayed
High roads are inverted. Some roads are ONEWAY.
This is indicated by a ">" or a "<".
Walls are shown as "O".

The game ends when energy goes below zero.

Controls:
Q = up
A = down
O = left
P = right
Newline = (re)start

The game has a built in option to select the number of chasing cabs.
After loading you must press 2 or 3 to select the numer of chasing cabs.
After 2 or 3 press Newline to start the game.
Any new game will always start with the selected cabs.

[JohnsBargs]

Name of Software: KILOPEDE
Author: Johan "Dr Beep" Koelman
Release Date: 02/04/2024
Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K lowres
Commercial / Public Domain / Free ware / Other - please specify? Freeware

Description:
A 1K version of CENTIPEDE
Kilopede.png

EDIT: BUGFIX FOR SHOOTING
EDIT2: BUGFIX FOR AUTOSHOOTING AFTER REDEFINED KEYS

How do you actually enable autoshooting? Holding down fire doesn't seem to work.