they miss your turret and hit the ground, they leave behind a small pile of atomic waste. If your turret collides with a pile, it blows up. As the game
VIC® 20 OWNERS
progresses, your territory gradually becomes lit tered with these piles of hazardous debris. There's
Fulfill the expansion needs of your computer with the
not much you can do about them. Soon your
maneuvering room is restricted, and you're at the mercy of the orbiting saucer.
RAM-SLOT MACHINE
Programmer's Notes Lines 100 through 140 move the saucer from one
side of (he screen to the other. Lines 200 through 260 move the bullet and detect hits. Lines 300 through 360 read the joystick and move the turret,
and line 400 reads the tire button. I included the routine at line 410, because it's something I always look for in a game — it lets
This versatile memory and slol expansion peripheral
lor the Commodore Vic-20 Computer consists of a plug-in cartridge with up to 24KBvtes of low power CMOS RAM and 3 additional expansion slots tor ROM. RAM and I/O. The cartridge also includes a re set button [eliminates using the power-on switch) and an auto start ROM selection switch.
you move the turret twice as fast as the saucer. That way, you can outrun the blasts and track the
SRSM-8K. 8K RAM + 3 slots $ 84.50 WRSM-16K. 16K RAM + 3 slots .... S 99.50 WRSM-24K. 24K RAM + 3 Slots .... $119.50
saucer as if you were shooting skeets.
The remainder of the 400-series lines initialize new bullets, and lines 500 through 560 move shots fired by the saucer.
See program listing on page 233. (ffi
We accept checks, money order. VisaJMastercard. Add
$2.50 for shipping, an additional $2.50 lor COD. Mich igan residents add 4% sales tax. Personal checksallow 10 days to Clear. " TrxlcmirK ol Commodore
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