Border

Change Border colour (using ROM routine)
Sets the border colour, replace N with the number of the desired colour.

ld a,N              ;0=blk,1=blu,2=red,3=mag,4=grn,5=cyn,6=yel,7=wht call 8859           ;bios call

Change Border Colour (using I/O Ports)
Sets the border colour, replace N with the number of the desired colour. Border colour will not be preserved after tape access or use of the BEEP command.

ld a,N out (254),a