e-Reader Dot Code Disassembler

Disassembles e-Reader z80 binaries into human readable code (assembly).

Convert card RAW to z80 binary

Prerequisites: download nedcenc.exe and nevpk.exe from caitsith2's site.

To extract the z80 binary from a card's RAW:

1. Decode RAW

   nedcenc.exe -d -i card.raw -o card.bin
   

2. Remove header (first 116 bytes) from card.bin using your preferred hex editor. card.bin first bytes should be:

   76 70 6b 30 (vpk0)
   

3. Decode vpk

   nevpk.exe -d -i card.bin -o card.z80
   

Disassemble z80 binary

Prerequisites: Download Node.js 11.0.0 or a later release.

1. Build

   npm run-script build
   

2. Disassemble

   npm start -- -i card.z80
   

This command outputs main.asm and multiple include files.

Build disassembled code back to RAW

Prerequisites: download SDCC and nedcmake.exe from caitsith2's site.

1. Build

   sdasz80.exe -l -o -s -p main.o main.asm
   

2. Link

   sdldz80.exe -n -- -i main.ihx main.o
   

3. Make binary

   makebin.exe -p < main.ihx > main.z80
   

4. Remove first 256 bytes (0x100) from main.z80

5. Generate RAW

   Indicate -region 0 for Japanese e-Reader, -region 1 for US e-Reader, -region 2 for Japanese e-Reader+.

   nedcmake.exe -i main.z80 -type 1 -region 1