DEFENCE FORCE UDG.
Posted: Thu Mar 23, 2023 9:32 pm
Being at a loose end I browsed through the pages of that most excellent site,"The type fantastic" and came across this little gem written by a lad of fourteen.
Taken from the magazine...
DEFENCE FORCE for Sinclair ZX-81
by Greg Jarvis
from Sinclair Programs, November 1984
Defence Force has many features including five skill levels, three
types of enemy, four lives, on-screen scoring and a high-score table.
As always, the object is to protect your base from the approaching
enemy. You have a force field to protect you, but once this has gone
defeat is imminent.
Written for the 16K ZX-81 by Greg Jarvis, aged 14, of Bridgwater,
Somerset.
I've created some UDGs for various bits and bobs but retained most of the original block graphics as I think the blend is a good one.
Those of you with the Big Bang x2 ROM will find this reasonably quick for a BASIC game.
As per my other efforts...
All three files in same folder.
UDG4ZXpand owners set it to 128 mode.
Eighty One, select Chr$ 128
SZ-81 select UDG
To use load and run the file "DEFREM.P" and it will do the rest, on screen instructions provided.
Taken from the magazine...
DEFENCE FORCE for Sinclair ZX-81
by Greg Jarvis
from Sinclair Programs, November 1984
Defence Force has many features including five skill levels, three
types of enemy, four lives, on-screen scoring and a high-score table.
As always, the object is to protect your base from the approaching
enemy. You have a force field to protect you, but once this has gone
defeat is imminent.
Written for the 16K ZX-81 by Greg Jarvis, aged 14, of Bridgwater,
Somerset.
I've created some UDGs for various bits and bobs but retained most of the original block graphics as I think the blend is a good one.
Those of you with the Big Bang x2 ROM will find this reasonably quick for a BASIC game.
As per my other efforts...
All three files in same folder.
UDG4ZXpand owners set it to 128 mode.
Eighty One, select Chr$ 128
SZ-81 select UDG
To use load and run the file "DEFREM.P" and it will do the rest, on screen instructions provided.