Jon Relay's Apple II Info Archives
Screen Holes
n is the slot number a peripheral card is in.
Apple II
$0478 1144 Slot address of card using $C800 space
//c mouse: clamping minimum, lo byte
$04F8 1272 //c mouse: clamping maximum, lo byte
$0578 1400 //c mouse: clamping minimum, hi byte
$05F8 1528 //c mouse: clamping maximum, hi byte
Super Serial Card
$0478+n 1144+n Delay: b0-1=FF b2-3=LF b4-5=CR b6-7=translate option
$04F8+n 1272+n Accumulator for firmware's command processor
$0578+n 1400+n b0-2=cmd mode b3-5=slot to ch to b6=lc b7=terminal/CR
$05F8+n 1528+n b0-6=command byte b7=zap control commands
$0678+n 1656+n Error: b0=parity b1=framing b2=overrun b3=carrier b5=error
$06F8+n 1784+n Modem Mode: b0-2=screen slot b3-7=$Cs00 space entry point
Printer Mode: current printer width
$0778+n 1912+n Modem Mode: input buffer
Printer Mode: current column
$07F8+n 2040+n b0=auto LF b1=comm.mode b2=keyb inp b3=chk XOFF b4=Pascal
b5=ignore LF b6=enable lc/tabs b7=echo
Apple IIc Serial
$0578+n 1400+n printer width $05F8+n 1528+n scratch $0678+n 1656+n b7=parsing command string $06F8+n 1784+n current command character $0778+n 1912+n b6=auto LF b7=echo $07F8+n 2040+n current printer column
80-Column Card
$0478+n 1144+n address of last output routine used by firmware $04F8+n 1272+n video firmware operating mode $0578+n 1400+n horizontal cursor position $05F8+n 1528+n vertical cursor position $0678+n 1656+n character to be printed/read $06F8+n 1784+n Pascal GOTOXY X coordinate $0778+n 1912+n scratch $07F8+n 2040+n scratch
Mouse Card
$0478+n 1144+n X coordinate, lo byte
$04F8+n 1272+n Y coordinate, lo byte
$0578+n 1400+n X coordinate, hi byte
$05F8+n 1528+n Y coordinate, hi byte
$0778+n 1912+n status: b1=movement int b2=button int b3=VBL int
b5=movement b6=still down from last b7=button down
$07F8+n 2040+n mode: b0=active b1=VBL on move b2=VBL on button b3=VBL
Apple IIc Auxiliary Memory
$0478 1144 printer port ACIA control reg $0479 1145 printer port ACIA command reg $047A 1146 printer port flags: b0=comm b6=auto LF b7=echo $047B 1147 printer port printer width $047C 1148 modem port ACIA control reg $047D 1149 modem port ACIA command reg $047E 1150 modem port flags: b0=comm b6=auto LF b7=echo $047F 1151 modem port line length
