Version 2.0 15 Jan-90 CALL SC the SCREEN commands There are 4 commands that control the super hi-res screen. This screen is graphics port #0 at $El/2000. You can either enable or disable the screen, change it to a specified color or set its mode. CALL SC works closely with CALL SB for example: If you want to set the screen to 640 mode graphics you must set the mode and set the scan line control bytes ... CALL SC,2,640 : CALL SB,0,!10000000,0,200 or to set the screen for 320 mode ... CALL SC,2,320 : CALL SB,0,!00000000,0,200
(mode) Must be 320 or 640 only. All other values are invalid and will return an error. ( colorword) A colorword is a value anywhere from 0 to 65535. There are only 16 solid colors in that range ... all the rest are dithers. Specifying a colorword in hex is the easiest because the 16 values are in straight numeric order: $0000 solid #0 $4444 solid #4 $8888 solid #8 $CCCC solid #12 $1111 solid #1 $5555 solid #5 $9999 solid #9 $DDDD solid #13 $2222 solid #3 $6666 solid #6 $AAAA solid #10 $EEEE solid #14 $3333 solid #4 $7777 solid #7 $BBBB solid #11 $FFFF solid #15Figure 2.15 Solid colorwords |