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So I recently added sram support to my Monaco Master game (to save high scores) using sverx's 'tutorial' from here:
https://www.smspower.org/forums/16013-DevkitSMSSMSlibMissingRequestingFeatures

I had no issues with that and it works great both in an emulator and real hardware. So, I thought I'd add the same functionality to my Sub-Assault game and it just doesn't want to work on a Master System. Bizarrely, saving works fine on a real SEGA MegaDrive and the Kega Fusion emulator but on a real Master System, Emulicious, MEKA etc. I get nothing (it doesn't even generate a .sav file).

*Problem has been solved :)

I suspect it's because the ROM size is < 64KiB so Emulicious (and the Master EverDrive) will think there's no mapper on the cartridge (no mapper means no SRAM too!)

use the -pm parameter with makesms

makesms -pm infile.ihx outfile.sms

to make sure the ROM size is 64 KiB (or multiples).

Perfect! That's done the trick. Thanks ^_^

Author	Message
Louis The SEGA Nerd Joined: 30 Jan 2023 Posts: 55 Location: Manchester, England	devkitsms weird sram issue Posted: Tue Aug 29, 2023 3:36 pm Last edited by Louis The SEGA Nerd on Tue Aug 29, 2023 8:36 pm; edited 1 time in total
	So I recently added sram support to my Monaco Master game (to save high scores) using sverx's 'tutorial' from here: https://www.smspower.org/forums/16013-DevkitSMSSMSlibMissingRequestingFeatures I had no issues with that and it works great both in an emulator and real hardware. So, I thought I'd add the same functionality to my Sub-Assault game and it just doesn't want to work on a Master System. Bizarrely, saving works fine on a real SEGA MegaDrive and the Kega Fusion emulator but on a real Master System, Emulicious, MEKA etc. I get nothing (it doesn't even generate a .sav file). *Problem has been solved :)

sverx Joined: 05 Sep 2013 Posts: 3828 Location: Stockholm, Sweden	Posted: Tue Aug 29, 2023 4:35 pm
	I suspect it's because the ROM size is < 64KiB so Emulicious (and the Master EverDrive) will think there's no mapper on the cartridge (no mapper means no SRAM too!) use the -pm parameter with makesms makesms -pm infile.ihx outfile.sms to make sure the ROM size is 64 KiB (or multiples).

Louis The SEGA Nerd Joined: 30 Jan 2023 Posts: 55 Location: Manchester, England	Posted: Tue Aug 29, 2023 8:35 pm
	Perfect! That's done the trick. Thanks ^_^

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