Write C64 Basic programs on your android device. Convert text files to basic in prg format.

The c64 keyboard has some special keys:

• key ↑ = ^

Cross-compile bastext

• See previous post on C64 programming on a Android Device for installing the Android Native Development Kit
• clone my version of bastext from my repository (adds some more commandline options, and make flags)

git clone https://github.com/dcrasch/bastext

• Edit the Makefile to enable Position Independ Executable compiling for latest devices

CC=/tmp/android/bin/arm-linux-androideabi-gcc  
# or for i686 CC=/tmp/android/bin/i686-linux-android-gcc
CFLAGS=-fPIE
LDFLAGS=-fPIE -pie

• Make bastext

make

• Download bastext executable to your device
• Install Terminal Emulator for Android
• Run Terminal

cd ~
cat /sdcard/Download/bastext > bastext
chmod 755 dasm

Configure DroidEdit

• Download DroidEdit
• Run DroidEdit
• settings... -> External command
• Add external command
• Name: basic
• Command: /data/data/jackpal.androidterm/app_HOME/bastext -d ${path}/${name}.prg -o ${path}/${file}
• Result action: Show results

Install Commodore 64 emulator

• install [Frodo C64][frodo] or other c64 emulator
• select disk .prg
• view result

Alternatives

• petcat

Small graphics program example c64 programmers reference page 126

2 print chr$(147)
5 base=2*4096:poke53272,peek (53272)or8
10 poke53265,peek(53265)or32
20 fori=basetobase+7999:poke i,0:next
50 forx=0to319step.5
60 y=int(90+80*sin(x/10))
70 ch=int(x/8)
80 ro=int(y/8)
85 ln=yand7
90 by=base+ro*320+8*ch+ln
100 bi=7-(xand7)
110 pokeby,peek(by)or(2^bi)
120 nextx
110 poke1024,16
130 goto130

Don't forget to add a empty last line. lines in basic are always closed with a newline.

More code in my c64 github repository.