JSave

Author: intoinside

E000.md

@@ -196,3 +196,27 @@ Loads or verifies a program file from tape or disk into a specified area of memo
   * clear if data has been loaded succesfully
   * set in case of error or if RUN/STOP has been pressed and .A contains error code
     * .A could be 4 (file not found), 8 (no name specified), 9 (illegal device number specificied), 16 (load extended over address $FEFF).
+
+<a name="FFD8"></a>
+
+## 65493 $FFD8 JSAVE
+
+<span class="badge badge-info">Entry point for the SAVE routine, currently at [$F53E](#F53E)</span>
+
+Saves the contents of a block of memory to disk or tape.
+
+### Input
+
+* JSETLFS at [$FFBA](#FFBA) must be called to establish device number and the secondary address.
+* JSETNAM at [$FFBD](#FFBD) must be called to specify the length and the address of the filename
+* JSETBNK at [$FF68](#FF68) must be called to specify the bank number where the filename can be found and the bank where the data is to be saved
+* .A must contain the address of zero-page pointer to the starting address to save
+* .X must contain the lo-byte of the ending address plus 1 for the save
+* .Y must contain the hi-byte of the ending address plus 1 for the save
+
+### Output
+
+* Carry bit will be affected:
+  * clear if data has been loaded succesfully
+  * set in case of error or if RUN/STOP has been pressed and .A contains error code
+    * .A could be 5 (serial device was not present), 9 (illegal device number specificied).