wip

.gitignore

@@ -0,0 +1 @@
+out

Makefile

@@ -5,7 +5,7 @@ CCFLAGS = --config apple2-asm.cfg
 
 OUTDIR = out
 
-TARGETS = $(OUTDIR)/path.BIN
+TARGETS = $(OUTDIR)/path.BIN $(OUTDIR)/bell.CMD $(OUTDIR)/hello.CMD
 
 .PHONY: clean all
 all: $(OUTDIR) $(TARGETS)

bell.s

@@ -0,0 +1,9 @@
+
+        .include "apple2.inc"
+
+BELL := $FBE4
+
+        .org    $4000
+
+        jsr     BELL
+        rts

hello.s

@@ -0,0 +1,18 @@
+
+        .include "apple2.inc"
+
+CROUT   := $FD8E
+COUT    := $FDED
+
+        .org    $4000
+
+        ldx     #0
+:       lda     str, x
+        beq     done
+        jsr     COUT
+        jmp     :-
+
+done:   jsr     CROUT
+        rts
+
+str:    .byte   "Hello, world!", 0

path.s

@@ -13,14 +13,26 @@
         .include "prodos.inc"
 
 ;;; ============================================================
+;;;
+;;; Installed command memory structure:
+;;; * 2 pages - code, path buffer
+;;; * 2 pages - I/O buffer
 
-INBUF           := $200         ; GETLN input buffer
+;;; TODO:
+;;;  * Dynamically allocate I/O buffer
+;;;  * Support multi-segment path (e.g. /hd/bin:/hd/extras/bin
+;;;  * Fail install if on an Integer BASIC machine
+;;;  * Skip leading spaces
+
+;;; ============================================================
 
 cmd_load_addr := $4000
 max_cmd_size   = $2000
 
 ;;; ============================================================
-;;; Monitor ROM routines
+;;; Monitor ROM routines/locations
+
+INBUF           := $200         ; GETLN input buffer
 
 CROUT   := $FD8E
 COUT    := $FDED
@@ -30,7 +42,6 @@ MOVE_SRC   := $3C
 MOVE_END   := $3E
 MOVE_DST   := $42
 
-
 TOKEN_NAME_TABLE := $D0D0
 
 CASE_MASK = $DF
@@ -41,8 +52,6 @@ CASE_MASK = $DF
 .proc installer
         ptr := $06
 
-        ;; TODO: Fail if Applesoft is not in ROM
-
         ;; Save previous external command address
         lda     EXTRNCMD+1
         sta     next_command