CBDOS refactoring

src/dos_m65/unit_sdcard/unit_sd_cmd_read.s

@@ -0,0 +1,20 @@
+
+;
+; Read more data into the buffer
+;
+
+
+unit_sd_cmd_READ:
+
+	lda SD_MODE
+	cmp #$03
+	+beq fs_vfs_read_file
+
+	lda SD_DIR_PHASE
+	cmp #$01
+	+beq fs_vfs_read_dir
+	cmp #$02
+	+beq fs_vfs_read_dir_blocksfree
+
+	sec ; mark EOI
+	rts