Added support for loading programs from Apple-1 Cartridge

.gitignore

@@ -1,2 +1,3 @@
 *.bin
 *.o
+*.label

Makefile

@@ -1,7 +1,8 @@
-AFLAGS  =
-LFLAGS  = -C apple1cartridge.cfg
+AFLAGS  = -g
+LFLAGS  = -C apple1cartridge.cfg -Ln applesoft-lite.label
 BINFILE = applesoft-lite.bin
 OBJS    = applesoft-lite.o io.o apple1serial.o
+LABELS  = applesoft-lite.label
 
 $(BINFILE): $(OBJS)
 	ld65 $(LFLAGS) $(OBJS) -o $(BINFILE)
@@ -19,4 +20,4 @@ io.o: io.s
 	ca65 $(AFLAGS) $<
 
 clean:
-	rm $(OBJS) $(BINFILE)
+	rm $(OBJS) $(BINFILE) $(LABELS)

README.md

@@ -6,12 +6,19 @@ See https://cowgod.org/replica1/applesoft/
 
 # apple1serial
 
-This branch has been modified to perform LOAD and SAVE operations via Apple-1 Serial interface
-https://github.com/flowenol/apple1serial
+This fork has been modified to perform LOAD and SAVE operations via Apple-1 Serial interface.
+
+See https://github.com/flowenol/apple1serial
 
 # How to use LOAD?
 
 The LOAD command implemented on this branch takes as an argument the length of the program
 as a decimal value, e.g.,
 
-]LOAD 1024
+`]LOAD 1024`
+
+# apple1cartridge
+
+This fork has been modified to allow loading programs from Apple-1 RAM/ROM Cartridge via the `STARTFROMCART` routine.
+
+See https://github.com/flowenol/apple1cartridge

applesoft-lite.s

@@ -602,6 +602,8 @@ FIX_LINKS:
 	jmp	RESTART
 @2:	ldy	#4		; FIND END OF THIS LINE
 @3:	iny			; (NOTE MAXIMUM LENGTH < 256)
+	;lda #'C'
+	;jsr OUTDO
 	lda	(INDEX),y
 	bne	@3
 	iny			; COMPUTE ADDRESS OF NEXT LINE
@@ -5498,3 +5500,64 @@ RESUME:	lda	ERRLIN		; RESTORE LINE # AND TXTPTR
 	ldx	ERRSTK		; RETRIEVE STACK PNTR AS IT WAS
 	txs			; BEFORE STATEMENT SCANNED
 	jmp	NEWSTT		; DO STATEMENT AGAIN
+
+; ----------------------------------------------------------------------------
+; START FROM CARTRIDGE ROUTINE
+; ----------------------------------------------------------------------------
+STARTFROMCART:
+	ldx	#$FF		; SET DIRECT MODE FLAG
+	stx	CURLIN+1
+	ldx	#$FB		; SET STACK POINTER, LEAVING ROOM FOR
+	txs			; LINE BUFFER DURING PARSING
+	lda	#<COLDSTART	; SET RESTART TO COLD.START
+	ldy	#>COLDSTART	; UNTIL COLDSTART IS COMPLETED
+	sta	GOWARM+1
+	sty	GOWARM+2
+	sta	GOSTROUTZ+1	; ALSO SECOND USER VECTOR...
+	sty	GOSTROUTZ+2	; ..WE SIMPLY MUST FINISH COLD.START!
+	lda	#$4C		; "JMP" OPCODE FOR 4 VECTORS
+	sta	GOWARM		; WARM START
+	sta	GOSTROUTZ	; ANYONE EVER USE THIS ONE?
+	sta	JMPADRS		; USED BY FUNCTIONS (JSR JMPADRS)
+
+; ----------------------------------------------------------------------------
+; MOVE GENERIC CHRGET AND RANDOM SEED INTO PLACE
+;
+; NOTE THAT LOOP VALUE IS WRONG!
+; THE LAST BYTE OF THE RANDOM SEED IS NOT
+; COPIED INTO PAGE ZERO!
+; ----------------------------------------------------------------------------
+	ldx	#GENERIC_END-GENERIC_CHRGET-1
+@1:	lda	GENERIC_CHRGET-1,x
+	sta	CHRGET-1,x
+	dex
+	bne	@1
+; ----------------------------------------------------------------------------
+	txa			; A=0
+	sta	SHIFTSIGNEXT
+	sta	LASTPT+1
+	pha			; PUT $00 ON STACK (WHAT FOR?)
+	lda	#3		; SET LENGTH OF TEMP. STRING DESCRIPTORS
+	sta	DSCLEN		; FOR GARBAGE COLLECTION SUBROUTINE
+	jsr	CRDO		; PRINT <RETURN>
+	lda	#1		; SET UP FAKE FORWARD LINK
+	sta	INPUTBUFFER-3
+	sta	INPUTBUFFER-4
+	ldx	#TEMPST		; INIT INDEX TO TEMP STRING DESCRIPTORS
+	stx	TEMPPT
+	jsr STXTPT    ; SET TXTPTR TO TXTTAB-1
+	ldy #0
+	lda #0
+	sta (TXTPTR),y ; ZERO THE TXTPTR - FOR SAKE OF RUN STATEMENT
+	lda	#<STROUT	; PUT CORRECT ADDRESSES IN TWO
+	ldy	#>STROUT	; USER VECTORS
+	sta	GOSTROUTZ+1
+	sty	GOSTROUTZ+2
+	lda	#<RESTART
+	ldy	#>RESTART
+	sta	GOWARM+1
+	sty	GOWARM+2
+	lda #$00
+	sta CURLIN
+	sta CURLIN+1
+	jmp	FIX_LINKS ; FIX LINKS FOR PROGRAM