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Games which require exact screen timing

Some games require exact screen timing because they have a carefully timed border effect or because they have a critical timing for updating their screen.

1942

has a high color effect in the start screen. nice. :-)

Academy

Start menu with overscan border effect.

You must connect a Kempston interface to control the mouse pointer.

Aquaplane

Game with overscan border effect. Horizon extends to whole screen width.

Thing

Critical screen update timing.

Zythum

Critical screen update timing.

This game has also a 'snow' effect using the fact, that the ULA misses some bytes if the video ram is accessed to frequently by the CPU, enforced by setting the I register to point into the video ram. This effect is not emulated by zxsp, and i don't know of any emulator which does.

Name Letzte Änderung Länge 
1942.sna 1999-10-01 12:09 49179 
Academy.z80 1999-10-01 12:13 36677 
Aquaplane.z80 1999-10-01 12:13 10666 
BIFF.TAP 2007-07-28 16:34 43678 
Black Lamp.tzx 2000-04-02 13:51 55774 
Thing.sna 1999-10-01 12:12 49179 
Zythum.sna 1999-10-01 12:12 49179 

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