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What would be the cheapest way to get a BASIC ROM for the SEGA YENO SC-3000H?

I have minipro programmer and was looking for a cheap cart that I could use, but all the carts seem quite expensive.

The Basic carts also have RAM in them, so it's a bit more complicated than just flashing a ROM. Maybe some flash carts support the extra RAM, but I'm not sure.

BKK wrote

The Basic carts also have RAM in them, so it's a bit more complicated than just flashing a ROM. Maybe some flash carts support the extra RAM, but I'm not sure.

I think I've seen that some multicarts have the basic, but they are expensive.
I was hoping someone was going to say you can open up the machine and just pop a ROM in the socket lol :)

You can program a ROM chip simply enough but the extra RAM that is in the cart is the harder part.

You may be able to do something with a video flipper cart. Its got provision for a second chip of some description, likely an sram chip, along with another chip which is likely to be a logic gate to deal with the address decoding for the RAM. Youd need to trace it out and draw a schematic of it to see if its suitable though. Pictures of the pcb are around on smspower.. google will find them for you if you have trouble.

Thanks for your input.
I've found the PCB pictures on here, but I don't think I could attempt building one without schematics.

*cough*
http://www43.tok2.com/home/cmpslv/Sc3000/EnrSCbas.htm

Enri's website has the schematic. The IIIB uses DRAM but you could design it to use SRAM instead.

asynchronous wrote

*cough*
http://www43.tok2.com/home/cmpslv/Sc3000/EnrSCbas.htm

Enri's website has the schematic. The IIIB uses DRAM but you could design it to use SRAM instead.

OH WOW! That's handy, Thanks.

I'll let you know how I get on ;)

Author	Message
RetroByte Joined: 29 Jan 2018 Posts: 23 Location: UK	I need a BASIC ROM SC-3000H Posted: Wed Aug 31, 2022 8:35 am
RetroByte Joined: 29 Jan 2018 Posts: 23 Location: UK	What would be the cheapest way to get a BASIC ROM for the SEGA YENO SC-3000H? I have minipro programmer and was looking for a cheap cart that I could use, but all the carts seem quite expensive.

BKK Joined: 01 May 2011 Posts: 467	Posted: Wed Aug 31, 2022 9:03 am
BKK Joined: 01 May 2011 Posts: 467	The Basic carts also have RAM in them, so it's a bit more complicated than just flashing a ROM. Maybe some flash carts support the extra RAM, but I'm not sure.

RetroByte Joined: 29 Jan 2018 Posts: 23 Location: UK	Posted: Wed Aug 31, 2022 9:25 am
RetroByte Joined: 29 Jan 2018 Posts: 23 Location: UK	BKK wrote The Basic carts also have RAM in them, so it's a bit more complicated than just flashing a ROM. Maybe some flash carts support the extra RAM, but I'm not sure. I think I've seen that some multicarts have the basic, but they are expensive. I was hoping someone was going to say you can open up the machine and just pop a ROM in the socket lol :)

wasup Joined: 05 Nov 2014 Posts: 435 Location: Auckland - NZ	Posted: Thu Sep 01, 2022 9:04 am
	You can program a ROM chip simply enough but the extra RAM that is in the cart is the harder part. You may be able to do something with a video flipper cart. Its got provision for a second chip of some description, likely an sram chip, along with another chip which is likely to be a logic gate to deal with the address decoding for the RAM. Youd need to trace it out and draw a schematic of it to see if its suitable though. Pictures of the pcb are around on smspower.. google will find them for you if you have trouble.

RetroByte Joined: 29 Jan 2018 Posts: 23 Location: UK	Posted: Thu Sep 01, 2022 9:50 am
RetroByte Joined: 29 Jan 2018 Posts: 23 Location: UK	Thanks for your input. I've found the PCB pictures on here, but I don't think I could attempt building one without schematics.

asynchronous Joined: 14 Aug 2000 Posts: 742 Location: Adelaide, Australia	I need a BASIC ROM SC-3000H Posted: Thu Sep 01, 2022 12:33 pm
	cough http://www43.tok2.com/home/cmpslv/Sc3000/EnrSCbas.htm Enri's website has the schematic. The IIIB uses DRAM but you could design it to use SRAM instead.

RetroByte Joined: 29 Jan 2018 Posts: 23 Location: UK	Posted: Thu Sep 01, 2022 1:22 pm
RetroByte Joined: 29 Jan 2018 Posts: 23 Location: UK	asynchronous wrote cough http://www43.tok2.com/home/cmpslv/Sc3000/EnrSCbas.htm Enri's website has the schematic. The IIIB uses DRAM but you could design it to use SRAM instead. OH WOW! That's handy, Thanks. I'll let you know how I get on ;)

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