[WHERE TO FIND]PROTEUS for ZX81

[JARC]

From Argentina

Czerweny CZ1500 game included

[mrtinb]

It's one of those games from South America, where you need to set your ZX81 to "NTSC". Because on "PAL" the game is simply too fast.

Copyright Microsoft 1983 -- well is it THAT Microsoft?

[kmurta]

It's one of those games from South America, where you need to set your ZX81 to "NTSC". Because on "PAL" the game is simply too fast.

At the end of the game a screen is displayed where you can select the game speed, select "LENTO = 8". But it is still fast on "PAL" machines. The ideal is to find the address where to insert the waiting code.

Copyright Microsoft 1983 -- well is it THAT Microsoft?

No, it was the software division of Microdigital, manufacturer of the TK82C, TK83 and TK85 (ZX81 clones). Later they changed the name to "Multisoft", probably due to a complaint from that Microsoft.

http://zx81.eu5.org/microsoft.htm

[kmurta]

It's one of those games from South America, where you need to set your ZX81 to "NTSC". Because on "PAL" the game is simply too fast.

At the end of the game a screen is displayed where you can select the game speed, select "LENTO = 8". But it is still fast on "PAL" machines. The ideal is to find the address where to insert the waiting code.

Here are the addresses to change the speed of the game:

SLOW = 25384
NORMAL = 20074
FAST = 21744

The original values are 5, 3 and 1, respectively (which are fast even on NTSC).

For "PAL" I think the values 14, 12 and 10 are acceptable

So, stop the game after loading and type in:

POKE 25384,14
POKE 20074,12
POKE 21744,10

then type RAND USR 23334 to select the velocity and start the game.

To make the changes permanent, change line 2:

2 RAND USR 23334

and save the game with GOTO 3.

[JARC]

Very good work. Congratulations.

Regards kmurta...!