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I've written a simple program for handling the header. For now it just inserts a 8K, 16K or 32K checksum into a header (at arbitrary locations). Since others might find it useful, here it is.

Philipp

P.S.: I wrote this for making Io work better on BIOS hardware platforms. For now I used it to insert a 8K checksum at 0x1ff0. Io now works on the SMS II emulation in MAME.

smsheader-0.1.tar.gz (193.37 KB)

Wla-DX already has a feature to do that automatically.

We tried to avoid making such programs too widely/easily available because of the existence of people that are fond of making and selling cheap repros (inundating ebay). Being too too lazy to figure things out not having a trivial tool available fends some of them out of the equation.

Author	Message
PkK Joined: 07 Aug 2007 Posts: 220 Location: Yach, Germany	Simple program for writing header into ROM files Posted: Sun Jun 04, 2017 7:40 am
	I've written a simple program for handling the header. For now it just inserts a 8K, 16K or 32K checksum into a header (at arbitrary locations). Since others might find it useful, here it is. Philipp P.S.: I wrote this for making Io work better on BIOS hardware platforms. For now I used it to insert a 8K checksum at 0x1ff0. Io now works on the SMS II emulation in MAME. smsheader-0.1.tar.gz (193.37 KB)

Bock Site Admin Joined: 08 Jul 2001 Posts: 8652 Location: Paris, France	Posted: Sun Jun 04, 2017 9:45 am
	Wla-DX already has a feature to do that automatically. We tried to avoid making such programs too widely/easily available because of the existence of people that are fond of making and selling cheap repros (inundating ebay). Being too too lazy to figure things out not having a trivial tool available fends some of them out of the equation.

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