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--- base:quicksort_16-bit_elements [2016-08-30 22:28]
litwr2 a fix for an array address >= $8000
+++ base:quicksort_16-bit_elements [2020-10-20 18:53] (current)
litwr2 a link added
@@ Line 251: / Line 251: @@
 qs_csp    ldx #0
-          dex
-          dex
           txs
@@ Line 263: / Line 261: @@
           lda #<array
           sta lblo
+          tsx
+          stx qs_csp+1
 qsok      lda lblo
           sta i2lo
@@ Line 395: / Line 395: @@
 </code>
-The locations //m3hi//, //m3lo//, //m4hi//, //m4lo// maybe situated anywhere in RAM.  The invocation should be in the next form.
+The locations //m3hi//, //m3lo//, //m4hi//, //m4lo// maybe situated anywhere in RAM.  The invocation just a call to quicksort routine.  However it is required to put the proper constants after //quicksort// label.  This makes the invocation code more complex in the general case.
-<code>
-          tsx
-          stx qs_csp+1
-          jsr quicksort
-</code>
-It is required to put the proper constants after //quicksort// label.  This makes the invocation code more complex in the general case.
-The other published 6502 Quicksort is at [[http://www.vcfed.org/forum/showthread.php?4687-QuickSort-in-6502-assembler|Vintage Computer Federation]]
+The other published 6502 Quicksort is at [[http://www.vcfed.org/forum/showthread.php?4687-QuickSort-in-6502-assembler|Vintage Computer Federation]]. More information can be found on page [[https://github.com/litwr2/6502-sorting|6502 sorting]]

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