README.md

@@ -119,13 +119,14 @@ This code calculates prime numbers using the Sieve of Eratosthenes algorithm::
 
     %import textio
     %zeropage basicsafe
-
+    
     main {
-        bool[256] sieve
+    
+        ubyte[256] sieve
         ubyte candidate_prime = 2       ; is increased in the loop
     
         sub start() {
-            sys.memset(sieve, 256, 0)   ; clear the sieve
+            sys.memset(sieve, 256, false)   ; clear the sieve
             txt.print("prime numbers up to 255:\n\n")
             ubyte amount=0
             repeat {
@@ -161,6 +162,9 @@ This code calculates prime numbers using the Sieve of Eratosthenes algorithm::
         }
     }
 
+
+
+
 when compiled an ran on a C-64 you'll get:
 
 ![c64 screen](docs/source/_static/primes_example.png)

docs/source/index.rst

@@ -120,11 +120,13 @@ This code calculates prime numbers using the Sieve of Eratosthenes algorithm::
     %zeropage basicsafe
 
     main {
-        bool[256] sieve
+        ubyte[256] sieve
         ubyte candidate_prime = 2       ; is increased in the loop
 
         sub start() {
-            sys.memset(sieve, 256, 0)   ; clear the sieve
+            ; clear the sieve, to reset starting situation on subsequent runs
+            sys.memset(sieve, 256, false)
+            ; calculate primes
             txt.print("prime numbers up to 255:\n\n")
             ubyte amount=0
             repeat {
@@ -145,7 +147,7 @@ This code calculates prime numbers using the Sieve of Eratosthenes algorithm::
             while sieve[candidate_prime] {
                 candidate_prime++
                 if candidate_prime==0
-                    return 0        ; we wrapped; no more primes
+                    return 0        ; we wrapped; no more primes available in the sieve
             }
 
             ; found next one, mark the multiples and return it.

examples/primes.p8

@@ -4,11 +4,12 @@
 ; Note: this program can be compiled for multiple target systems.
 
 main {
+
     bool[256] sieve
     ubyte candidate_prime = 2       ; is increased in the loop
 
     sub start() {
-        sys.memset(sieve, 256, 0)   ; clear the sieve
+        sys.memset(sieve, 256, 0)   ; clear the sieve, to reset starting situation on subsequent runs
 
         ; calculate primes
         txt.print("prime numbers up to 255:\n\n")
@@ -25,6 +26,8 @@ main {
         txt.print("number of primes (expected 54): ")
         txt.print_ub(amount)
         txt.nl()
+
+        ; test_stack.test()
     }
 
 

gradle.properties

@@ -5,4 +5,4 @@ org.gradle.daemon=true
 kotlin.code.style=official
 javaVersion=11
 kotlinVersion=1.9.22
-version=10.3
+version=10.3-SNAPSHOT