First public commit.

lenser/viewer/loaddata.i

@@ -0,0 +1,20 @@
+; Separate-binary prologue.  When SEPARATE=1 the picture is NOT appended to this
+; viewer; it lives in its own disk file "data" (load address $2000).  Pull it in
+; with the KERNAL before displaying.  When SEPARATE=0 this is nothing, and the
+; data was appended after the viewer instead.
+#if SEPARATE == 1
+        lda #4
+        ldx #<cv_dataname
+        ldy #>cv_dataname
+        jsr $ffbd                 ; SETNAM
+        lda #1
+        ldx #8
+        ldy #1
+        jsr $ffba                 ; SETLFS  (secondary 1 = load to file's address)
+        lda #0
+        jsr $ffd5                 ; LOAD "data" -> $2000
+        jmp cv_loaded
+cv_dataname:
+        .byte $44,$41,$54,$41     ; "DATA" in PETSCII (the c1541 "data" file)
+cv_loaded:
+#endif