1 | the following will go into the custom .romhdr section which will be placed at

2 | address 100h of the binary by the linker (see lnkscript).

3 .section .romhdr,"a"

4

5 #ifndef GAMENAME

6 #define GAMENAME "unnamed"

7 #endif

8 #ifndef VERSTR

9 #define VERSTR "00"

10 #endif

11

12 .ascii "SEGA MEGA DRIVE (C)MINDLAPSE2017"

13 hdr_game_dom:

14 .ascii GAMENAME

15 hdr_game_dom_end:

16 .fill 48 - (hdr_game_dom_end - hdr_game_dom),1,32 | pad to 48 bytes with spaces

17 hdr_game_int:

18 .ascii GAMENAME

19 hdr_game_int_end:

20 .fill 48 - (hdr_game_int_end - hdr_game_int),1,32 | pad to 48 bytes with spaces

21 .ascii "GM" | it's a game (who cares what it is?)

22 .ascii "0000000-" | product code

23 .ascii VERSTR | version string

24 .short 0 | checksum

25 .ascii "J " | I/O support (joypad)

26 .long 0 | start address of ROM

27 .long _rom_end | last address of ROM

28 .long 0xff0000 | start address of RAM

29 .long 0xffffff | last address of RAM

30 .long 0 | SRAM enabled(?)

31 .long 0 | ???

32 .long 0 | start address of SRAM

33 .long 0 | last address of SRAM

34 .long 0 | ???

35 .long 0 | ???

36 .fill 40,1,32 | notes (fill with spaces for now TODO)

37 .ascii "JUE " | country codes