Add assembly of clock driver

Apple2/Clock.Driver.asm

@@ -0,0 +1,48 @@
+enableWriteLang = $C088
+disableWriteLang = $C082
+
+prodosJump = $BF06
+prodosClockCode = $BF07
+prodosMachineId = $BF98
+
+; Find Apple2-IO-RPi card
+
+; Change driver code to point to the card
+
+; Change destination to be ProDOS clock code location
+ lda prodosClockCode
+ sta DriverDestination+1
+ lda prodosClockCode+1
+ sta DriverDestination+2
+
+; Changing RTS to JMP enables clock driver
+ lda #$4C ; jump instruction
+ sta prodosJump
+
+; Enable writing to language card RAM
+; by triggering switch twice
+ lda enableWriteLang
+ lda enableWriteLang
+
+; write driver code to language card RAM
+WriteDriver:
+ ldy #EndDriver-Driver+1
+ lda Driver,y
+DriverDestination:
+ sta $D000,y ; this address gets modified above
+ dey
+ bne WriteDriver
+
+; Disable writing to language card RAM
+ lda disableWriteLang
+
+; Update ProDOS Machine ID to mark clock as enabled
+ lda prodosMachineId
+ ora #$01
+ sta prodosMachineId
+
+ rts
+
+Driver:
+EndDriver:
+ rts

Apple2/assemble.cmd

@@ -88,7 +88,12 @@ ca65 RPi.Command.asm -D HW_TYPE=%HW_TYPE% -o RPi.Command.o --listing RPi.Command
 ld65 RPi.Command.o -o RPi.Command.bin -C ../.cicd/none.cfg 
 @if errorlevel 1 goto exit
 
-del *.o
+ca65 Clock.Driver.asm -D HW_TYPE=%HW_TYPE% -o Clock.Driver.o --listing Clock.Driver.lst
+@if errorlevel 1 goto exit
+ld65 Clock.Driver.o -o Clock.Driver.bin -C ../.cicd/none.cfg 
+@if errorlevel 1 goto exit
+
+cdel *.o
 del DriveFirmware.bin
 del MenuFirmware.bin
 del CommandFirmware.bin

Apple2/assemble.sh

@@ -51,6 +51,9 @@ ld65 Shell.o -o ../RaspberryPi/driveimage/Shell.bin -C ../.cicd/none.cfg  || exi
 ca65 RPi.Command.asm -D HW_TYPE=$HW_TYPE -o RPi.Command.o --listing RPi.Command.lst || exit 1
 ld65 RPi.Command.o -o ../RaspberryPi/driveimage/RPi.Command.bin -C ../.cicd/none.cfg  || exit 1
 
+ca65 Clock.Driver.asm -D HW_TYPE=$HW_TYPE -o Clock.Driver.o --listing Clock.Driver.lst || exit 1
+ld65 Clock.Driver.o -o ../RaspberryPi/driveimage/Clock.Driver.bin -C ../.cicd/none.cfg  || exit 1
+
 rm ./*.o
 rm DriveFirmware.bin
 rm MenuFirmware.bin