The BASIC commands are implemented, small font created, and demonstrations implemented. Please enjoy this Space War and Omega Race inspired flying ship.
Source, disk image, and more details are on github for Commodore Vic-20 with memory expansion.
BASIC extension command syntax is:
COLOR [foreground[+8][,[background][,[border][,auxillary[,inverse]]]]]
COLOR [foreground[+8]] @ x1,y1 [TO x2,y2]
TEXT
HIRES xresolution, yresolution [,fillbyte]
DELAY jiffies
PLOT COLOR ON|OFF
PLOT [NOT|CLR] (@ x1,y1)|(TO x2,y2)... **
PLOT 0|1|2|3 (@ x1,y1)|(TO x2,y2)...
PLOT "ABC" @ x,y [,addr [,width,height [,bytes]]]
RECT [NOT|CLR] [@] x1,y1 TO x2,y2
RECT 0|1|2|3 @ x1,y1 TO x2,y2
SHAPE GET|PUT|OR|XOR|AND|NOT|CLR addr @ x1, y1 TO x2, y2
** only first @ optional, when not multi-color
