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--- base:exomizer_making_custom_oldschool_decrunch_effects [2021-06-11 14:33] – created richard
+++ base:exomizer_making_custom_oldschool_decrunch_effects [2021-06-11 16:18] – richard
@@ Line 1: / Line 1: @@
 ===== Exomizer adding a custom de-crunch effect and de-crunch text =====
-You may have remembered back in the 1980's / 1990's C64 scene groups liked to present their own productions by adding a de-crunch 1-liner to your own programs. A lot of these were made in Cruel Crunch or Power Crunch. Nowadays, for speed and efficiency the majority of us have moved to cross-platform coding. We know how much of a boring process crunching has been. Some of us still miss the decrunch text method.
+You may have remembered back in the 1980's / 1990's C64 scene groups liked to present their own productions by adding a de-crunch effect or a 1-liner to their own programs before de-crunching the data and executing the program. A lot of these were made in Speed Packer, Cruncher AB, Cruel Crunch, Power Crunch, etc. Nowadays, for speed and efficiency the majority of us have moved to cross-platform coding. We know how much of a boring process crunching has been. Some of us still miss the decrunch text method.
-Exomizer has a custom de-crunch effect routine, when using SFX mode. Its default effect is a flashing character at the bottom right of the screen. There are possibilities of customizing exomizer to do really cool de-crunch effects based on the old packers/crunchers you may have used. For example, here is an example of the [b]Speed Packer V1.1[/b] decrunch sound:
+Decrunch effects were used in order to show that something is happening and the program isn't just stuck.
-** exomizer sfx $4245 rayfish.prg -o rayfish.prg -s "lda #$00 sta $fb" -x "lda $fb eor #$01 sta $fb beq skip inc $d418 skip:" ** (replace with $d020 if you want thick multicolour bars instead of strange noises);
+Exomizer has a custom de-crunch effect routine, when using SFX mode. Its default effect is a flashing character at the bottom right of the screen. There are possibilities of customizing exomizer to do really cool de-crunch effects based on the old packers/crunchers you may have used. For example, here is an example of the ** Speed Packer V1.1 ** decrunch sound:
+** exomizer sfx $4245 rayfish.prg -o rayfish.prg -s "lda #$00 sta $fb" -x "lda $fb eor #$01 sta $fb beq skip inc $d418 skip:" **
+(replace with $d020 if you want thick multicolour bars instead of strange noises);
+A post on Lemon 64 Forum has a list of example programmable decrunch effects which resemble some of the old crunchers. If you want to use them, here is a list of those:
+**Cruncher AB Style** (Black, White, Green, Purple - Change the AND (or make ORA) value to pick different colour scheme)
+-x "lda $fb eor #$01 sta $fb beq skip inc $fc lda $fc and #$05 sta $d020 skip:" -s "lda #$00 sta $d011" -f "lda #$1b sta $d011"
+**Coloured stripe columns**
+-x "inc $fb lda $fb sta $d020 lda #$00 sta $d020"
+** Black and white stripe columns**
+-x "lda $fb eor #$01 sta $fb beq skip lda #$01 sta $d020 lda #$00 sta $d020 skip:"
+** Hi-Tec loader style stripe columns **
+-x "lda $fb eor #$01 sta $fb beq skip dec $d020 inc $d020 skip:"
+** Black and single colour stripes **
+Change the eor #$XX instruction depending on which colour you want:
+eor #$01 = White
+eor #$02 = Red
+eor #$03 = Cyan
+eor #$04 = Purple
+eor #$05 = Green
+eor #$06 = Blue
+eor #$07 = Yellow
+eor #$08 = Orange
+eor #$09 = Brown
+eor #$0a = Light red
+eor #$0b = Dark grey
+eor #$0c = Grey
+eor #$0d = Light green
+eor #$0e = Light blue
+eor #$0f = Light grey
+-x "lda $fb eor #$01 sta $fb beq skip lda $fc eor #$XX sta $d020 sta $fb sta $fc skip:"
+** Thicker inc $d020 stripes**
+-x "lda $fb eor #$01 sta $fb beq skip inc $d020 skip:"
+** File Press Expert effect **
+Set start of decruncher to red border the run depacker
+-x "lda $fb eor #$01 sta $fb beq skip lda $d020 eor #$01 sta $d020 skip:" -s "lda #$02 sta $d020"
+** The Sharks Darksqueezer 0.1 ** (flickers the chars at the top left)
+-x "dec $0400 inc $0401 stx $0402"
+** Beastlinker ** (but slightly thicker)
+-x "ora #$05 sta $d020"
+** Amazing ByteRaper ** (without any text)
+-x "ora #$05 sta $d021 sta $d418"
+** FX Equal Sequence V2 ** (aka as the Mega Cruncher)
+-x "inc $fb lda $fb sta $d020 lda #0 sta $d020"
 ==== Adding Decrunch text to Exomizer SFX ====
@@ Line 18: / Line 76: @@
 <code>
 !to "rayfishcomplete.prg",cbm
@@ Line 23: / Line 82: @@
 *=$0801
 !bin "rayfish+.prg",,2
+;Black the screen
 lda #0
 sta $d020
 sta $d021
+;-------------------------------
 ldx #$00  ;If using KERNAL RAM,
 clrscrn   ;simply use JSR $E544
-lda #$20
+lda #$20  ;instead of this
 sta $0400,x
 sta $0500,x
@@ Line 35: / Line 97: @@
 inx
 bne clrscrn
+;--------------------------------
+;The decrunch text output routine
 ldx #decrunchtextend-decrunchtext
 maketext
@@ Line 43: / Line 109: @@
 dex
 bpl maketext
+;Always terminate with an RTS
 rts
-!ct scr
+!ct scr ;If using C64 studio
+;The decrunch text
 decrunchtext
 !text "-bringing the new dimension to your c64-"
 decrunchtextend
 </code>