QS Invaders from Quicksilva
Posted: Tue Apr 22, 2025 2:29 am
A nice Space Invaders clone from Quicksilva written by Dave Edwards
QS Invaders ZX81
* Automatically detects if you have a Quicksilva QS Sound Board and makes very nice Space Invader sounds
* Automatically detects if you have a Quicksilva QS CHRS Board
with QS CHRS Board
This also works with EightyOne: On the Hardware menu. select Chr$ Generator: Quicksilva, then on the Control menu tap "Enable Quicksilva character board"
CONTROLS: Left - Right - Fire
I was a bit confused by this. Does it require a joystick? No random amount of key smashing could get anything to happen. Then I read the extra card in the cassette containing TABLE A, where it lists 6=SHIFT LEFT, 7=SHIFT RIGHT, 0=FIRE. Which is odd because those are the UP ARROW and DOWN ARROW keys
The program is a hybrid, with machine code for smooth gameplay, and BASIC for menus and configuration. The BASIC part makes POKEs to configure the M/C. As a plus, this means you can POKE many things such as speed and controls
The BASIC has these lines:
QS Invaders ZX81
* Automatically detects if you have a Quicksilva QS Sound Board and makes very nice Space Invader sounds
* Automatically detects if you have a Quicksilva QS CHRS Board
with QS CHRS Board
CONTROLS: Left - Right - Fire
I was a bit confused by this. Does it require a joystick? No random amount of key smashing could get anything to happen. Then I read the extra card in the cassette containing TABLE A, where it lists 6=SHIFT LEFT, 7=SHIFT RIGHT, 0=FIRE. Which is odd because those are the UP ARROW and DOWN ARROW keys
The program is a hybrid, with machine code for smooth gameplay, and BASIC for menus and configuration. The BASIC part makes POKEs to configure the M/C. As a plus, this means you can POKE many things such as speed and controls
The BASIC has these lines:
Code: Select all
1 REM *** SPACE INVADERS ***
2 REM *** BY DAVE EDWARDS ***