add ProBoot bootloader

Makefile

@@ -35,14 +35,12 @@ asm: md
 dsk: md asm
 	$(CADIUS) CREATEVOLUME build/"$(DISK)" "${VOLUME}" 32766KB >>build/log
 	cp res/_FileInformation.txt build/ >>build/log
-	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/" "res/PRODOS" >>build/log
+#	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/" "res/PRODOS" >>build/log
 	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/" "build/LAUNCHER.SYSTEM" >>build/log
 	$(CADIUS) CREATEFOLDER build/"$(DISK)" "/${VOLUME}/X/" >>build/log
 	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/" "res/GAMES.CONF" >>build/log
 	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/" "res/ATTRACT.CONF" >>build/log
 	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/" "res/FX.CONF" >>build/log
-	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/" "res/COVER" >>build/log
-	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/" "res/COVER.A2FC" >>build/log
 	rsync -aP res/hgr/* build/HGR >>build/log
 	bin/buildfileinfo.py build/HGR >>build/log
 	$(CADIUS) ADDFOLDER build/"$(DISK)" "/${VOLUME}/HGR" "build/HGR" >>build/log
@@ -58,15 +56,11 @@ dsk: md asm
 	bin/do2po.py res/dsk/ build/po/
 #	rsync -a res/dsk/*.po build/po/
 #	bin/extract.py build/po/ | sh >build/log
-#	rm -f build/X/**/.DS_Store
-#	rm -f build/X/**/PRODOS
-#	rm -f build/X/**/LOADER.SYSTEM
-#	$(CADIUS) ADDFOLDER build/"$(DISK)" "/${VOLUME}/X" "build/X" >build/log
-
-artwork: dsk
-#	$(CADIUS) ADDFOLDER build/"$(DISK)" "/${VOLUME}/ARTWORK" "res/artwork"
-#	$(CADIUS) ADDFILE build/"$(DISK)" "/${VOLUME}/ARTWORK/" "res/DHRSLIDE.SYSTEM"
-#	$(CADIUS) ADDFOLDER build/"$(DISK)" "/${VOLUME}/ARTWORKGS" "res/artworkgs"
+	rm -f build/X/**/.DS_Store
+	rm -f build/X/**/PRODOS
+	rm -f build/X/**/LOADER.SYSTEM
+	$(CADIUS) ADDFOLDER build/"$(DISK)" "/${VOLUME}/X" "build/X" >build/log
+	bin/changebootloader.py build/"$(DISK)" res/proboothd
 
 mount: dsk
 	osascript bin/V2Make.scpt "`pwd`" bin/4cade.vii build/"$(DISK)"
@@ -83,4 +77,4 @@ md:
 clean:
 	rm -rf build/
 
-all: clean asm dsk artwork mount
+all: clean asm dsk mount

bin/changebootloader.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python3
+
+import sys
+import os.path
+
+target_2mg_file, bootloader = sys.argv[1:]
+assert(os.path.splitext(target_2mg_file)[-1].lower() == ".2mg")
+with open(bootloader, 'rb') as f:
+    boot = f.read()
+assert(len(boot) == 512)
+with open(target_2mg_file, 'rb') as f:
+    data = bytearray(f.read())
+data[64:64+len(boot)] = boot
+with open(target_2mg_file, 'wb') as f:
+    f.write(data)

src/4cade.a

@@ -207,12 +207,14 @@ HGRLoad
          ; load HGR screenshot at $4000
          +LOAD_FILE kHGRScreenshotDirectory, PTR
 
-         jsr   $6000                            ; transition effect code was loaded here earlier
+         jsr   $6000                 ; transition effect code was loaded here earlier
          jmp   WaitOnScreenshot
 
 DHGRLoad
          ldx   $C000
-         bmi   Exit
+         bpl   +
+         rts
++
          +STAY PTR
          jsr   ResetPath
          +LDADDR kDHGRScreenshotDirectory
@@ -224,21 +226,15 @@ DHGRLoad
          jsr   LoadDHRFile
          !word gPathname
          jsr   FizzleDHGR
+         ; note: execution falls through here
 WaitOnScreenshot
-         ldx   #0
-         ldy   #0
-@wait    lda   $C000
-         bmi   Exit
-         jsr   @burn
-         dey
-         bne   @wait
+         ldx   #$20
+-        lda   #0
+         jsr   WaitForKeyWithTimeout
+         bmi   +
          dex
-         bne   @wait
-         rts
-@burn    jsr   @burn2
-@burn2   jsr   @burn3
-@burn3   jsr   Exit
-Exit     rts
+         bpl   -
++        rts
 
 LoadTransition
          jsr   okvs_nth              ; get filename of transition effect code