rewrite memset to make it 59523 cpu cycles faster in memset_test

wip-hugo/routines/circle/circle.s

@@ -24,7 +24,6 @@
 .proc circle; user-procedure :clobbers (A X Y) :clobbers-arguments 3
 
         .include "circle.inc"
-
         ;; X_math = radius (share the same address)
         ;;Y_math =0
         LDA #$00

wip-hugo/routines/circle/circle_test.s

@@ -1,9 +1,11 @@
 .scope circle_test
         .include "circle.inc"
+        ;; set initial values
         LDA #$58
         STA X_pos
         STA Y_pos
         LDA #$40
         STA radius
+        ;; draw circle
         JSR circle
 .endscope

wip-hugo/routines/circle/circle_test_position.s

@@ -1,6 +1,7 @@
 .scope circle_test_position_x
         .include "circle.inc"
 
+        ;; Set initial parameters for circle
         LDA #$50
         STA $AD
         LDA #$50
@@ -8,37 +9,39 @@
         LDA #$40
         STA $AF
 
+loop:
+;delay: ;lets delay the print
+;        LDX #$ff
+;        LDY #$ff
+;delay_point:
+;        NOP
+;        NOP
+;        DEX
+;        BNE delay_point
+;        DEY
+;        BNE delay_point
 
-
-        LDX #$ff
-        LDY #$ff
-        hihi:
-        NOP
-        NOP
-        DEX
-        BNE hihi
-        DEY
-        BNE hihi
-
-        INC $AD
-
-        LDA $AD
-        STA X_pos
-        LDA $AE
-        STA Y_pos
-        LDA $AF
-        STA radius
-
+        ;;clear screen
         VIC_bank = $4000
         Mov_16 A_start, A_start + 1, #<VIC_bank, #>VIC_bank
         Mov_16 length, length + 1, #<$1f40,  #>$1f40
         LDA #$00
         jsr memset
 
+        ;;move circle
+        INC $AD
+
+        ;; draw circle
+        LDA $AD
+        STA X_pos
+        LDA $AE
+        STA Y_pos
+        LDA $AF
+        STA radius
         JSR circle
 
-        LDX #$ff
-        LDY #$ff
-
-        jmp hihi
+        ;; end loop when x_pos = $70
+        LDA $AD
+        CMP #$70
+        BNE loop
 .endscope

wip-hugo/routines/circle/circle_test_size.s

@@ -1,45 +1,47 @@
 .scope circle_test_size
         .include "circle.inc"
 
-        LDA #$50
-        STA X_pos
-        STA Y_pos
+
+        ;;Set initial parameters for circle
         LDA #$01
         STA $AD
 
+loop:
+
+;delay: ;lets delay the print
+;        LDX #$ff
+;        LDY #$ff
+;delay_point:
+;        NOP
+;        NOP
+;        DEX
+;        BNE delay_point
+;        DEY
+;        BNE delay_point
 
 
-        LDX #$ff
-        LDY #$ff
-        hihi:
-        NOP
-        NOP
-        DEX
-        BNE hihi
-        DEY
-        BNE hihi
-
+        ;; set other parameters for circle
         LDA #$50
         STA X_pos
         STA Y_pos
 
+        ;; make circle radius bigger
         INC $AD
         LDA $AD
-
         STA radius
 
-
-
+        ;; clean the screen
         VIC_bank = $4000
         Mov_16 A_start, A_start + 1, #<VIC_bank, #>VIC_bank
         Mov_16 length, length + 1, #<$1f40,  #>$1f40
         LDA #$00
         jsr memset
 
+        ;; draw the circle
         JSR circle
 
-        LDX #$ff
-        LDY #$ff
-
-        jmp hihi
+        ;; end loop if radius = $aa
+        LDA $AD
+        CMP #$20
+        BNE loop
 .endscope

wip-hugo/routines/memory/memcpy.s

@@ -1,6 +1,8 @@
 ;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*-
 
-;;Move length bytes from A_start address to lenght bytes starting at B_start.
+;;Moves data from buffer A to B.
+;; Buffer A starts at 'A_start' and B starts att 'B_start'.
+;; The data has length 'length'.
 .proc memcpy
         .include "mem.inc"
         LDY #$00

wip-hugo/routines/memory/memset.s

@@ -1,23 +1,35 @@
 ;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*-
 
-;; Sets memory in A to all addresses from B_start to B_end
-;; Modifies A, X and B_start
+;; Sets memory in 'A'-registry to all addresses from 'A_start' until 'A_start' + 'length'
+;; Modifies A, X and A_start
 .proc memset
         .include "mem.inc"
-        LDY #$00
-loop:
-        STA (A_start), Y
-        INY
-        BEQ y_overflow
-change_length:
-        DEC length
-        BNE loop
 
-        DEC length +1
-        BPL loop
-        RTS
-y_overflow:
-        ;; Y is now 0
+;; big_set sets the memory in $ff chunks.
+;; skipp if length >= $ff
+LDX length +1
+BEQ small_set
+
+big_set:
+        LDY #$ff
+big_set_loop:
+        STA (A_start), Y
+        DEY
+        BNE big_set_loop
+        STA (A_start), Y  ; don't forget Y=0
+        ;;maybe move to next chunk
         INC A_start + 1
-        jmp change_length
+        DEC length + 1
+        BNE big_set
+
+;;sets the rest of the memory
+small_set:
+        LDY length
+small_set_loop:
+        STA (A_start), Y
+        DEY
+        BNE small_set_loop
+        STA (A_start), Y
+        RTS
+
 .endproc

wip-hugo/source.s

@@ -11,13 +11,13 @@
 ;.include "routines/arithmatic/mult_test.s"
 ;.include "routines/arithmatic/div_test.s"
 ;.include "routines/circle/circle_test.s"
-.include "routines/circle/circle_test_size.s"
+;.include "routines/circle/circle_test_size.s"
 ;.include "routines/circle/circle_test_position.s"
 ;.include "routines/line/line_test.s"
 ;.include "routines/text/char_draw_test.s"
 ;.include "routines/pixel/pixel_test.s"
 ;.include "routines/memory/memcpy_test.s"
-;.include "routines/memory/memset_test.s"
+.include "routines/memory/memset_test.s"
 ;.include "routines/triangle/triangle_test.s"
 exit:
 JMP exit