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A while ago I acquired an SF-7000 in Japan while looked like a prototype on the ground that:
- it has no marking on the back
- no product nor serial number
- came bundled with Music and Uranai Angel Cutie cartridges which looked like prototypes. For some reason I haven't managed to dump that Music cartridge yet.

It also came with other rare items (e.g. Sega Base, Sega Writer).

When opening it the board says 4103-01 (vs 4103-03 for my French SF-7000) and the IPL EPROM has a label saying "IPL 0.61" "1984.8.17". This is the EPROM I have now dumped and is attached to this post.

It has 467 different bytes compared to the existing IPL:
https://www.smspower.org/forums/8911-SF7000IPLROMDocumented
https://www.smspower.org/Development/SF-7000IPL

This is technically a new dump, I'll mark it as so and may make a news post about it later, but I thought it would be worth investigating the code since we have a thorough SF-7000 IPL disassembly already, courtesy of Maxim.

At this point I don't know if the "normal" Japanese SF-7000 unit uses this same 0.61 IPL or if it uses the IPL we know about, as I don't own a normal Japanese SF-7000.
I have however confirmed from past auction photos that a normal Japanese SF-7000 has marking on the back.

Some question I have:
- Would be good to investigate the difference between this and existing IPL.
- Do we have any clue from existing IPL about a version number and/or a date, to compare it to the version number (0.61) and date (1984.8.17) or this newly dumped one?

SF-7000 IPL 0.61.jpg (462.75 KB)

SF-7000 IPL [v0.61].zip (3.14 KB)

Attached are the photos showing the lots from when I bought it, for reference.

600x450-2016051800001.jpg (50.2 KB)

600x450-2016051800002.jpg (49.01 KB)

600x450-2016051800003.jpg (50.58 KB)

600x450-2016051800004.jpg (49.88 KB)

600x450-2016051800005.jpg (50.48 KB)

600x450-2016051800006.jpg (50.55 KB)

The disassembly is at https://github.com/maxim-zhao/smsbioses/tree/master/SF-7000%20IPL . I don’t think there’s any kind of version notes inside it.

I suspect many of the differences should be the font which is different between Japanese and Export releases of SC-3000 BASIC.

I can confirm the only difference to the existing dump is the character font, as per https://www.smspower.org/Development/SC-3000Font, and then the final byte which is manipulated to make the checksum equal zero.

My EU SF-7000 IPL uses a standard ROM and looks like this...

IPL_MBM2764@DIP28.jpg (1.56 MB)

…that seems to be an EPROM.

siriokds wrote

My EU SF-7000 IPL uses a standard ROM and looks like this...

Could you confirm its CRC32 ? (mine is 8 KB, CRC32 d76810b8)

Is there a way to easily confirm it? Peeking the last byte of the IPL will likely be different for any different IPL, is that easy to do from BASIC?

Bock wrote

siriokds wrote

My EU SF-7000 IPL uses a standard ROM and looks like this...

Could you confirm its CRC32 ? (mine is 8 KB, CRC32 d76810b8)

I didn't calculate but I did a file comparison.
Mine it's a standard ROM.

Maxim wrote

…that seems to be an EPROM.

You're right. 8KB EPROM.
I really don't know what "EPR" means.

siriokds wrote

I didn't calculate but I did a file comparison.

You did a file comparison between which files? Did you confirm yours matched an existing one?

You can run a SUM16 from Basic (all add bytes values from all 8 KB of the address space mapped to IPL, store total in a 16-bit value) and report that value too, it should be sufficient.

Bock wrote

siriokds wrote

I didn't calculate but I did a file comparison.

You did a file comparison between which files? Did you confirm yours matched an existing one?

You can run a SUM16 from Basic (all add bytes values from all 8 KB of the address space mapped to IPL, store total in a 16-bit value) and report that value too, it should be sufficient.

I confirm my IPL matches all bytes.
SUM16 is $6C00

siriokds wrote

I confirm my IPL matches all bytes.
SUM16 is $6C00

Thanks, that matches the first IPL rom we have (and not the 0.61 one which is $7D00).

Author	Message
Bock Site Admin Joined: 08 Jul 2001 Posts: 8652 Location: Paris, France	SF-7000 IPL 0.61 dumped (may be prototype) Posted: Sun Feb 25, 2024 4:47 pm Last edited by Bock on Sun Feb 25, 2024 4:53 pm; edited 1 time in total
	A while ago I acquired an SF-7000 in Japan while looked like a prototype on the ground that: - it has no marking on the back - no product nor serial number - came bundled with Music and Uranai Angel Cutie cartridges which looked like prototypes. For some reason I haven't managed to dump that Music cartridge yet. It also came with other rare items (e.g. Sega Base, Sega Writer). When opening it the board says 4103-01 (vs 4103-03 for my French SF-7000) and the IPL EPROM has a label saying "IPL 0.61" "1984.8.17". This is the EPROM I have now dumped and is attached to this post. It has 467 different bytes compared to the existing IPL: https://www.smspower.org/forums/8911-SF7000IPLROMDocumented https://www.smspower.org/Development/SF-7000IPL This is technically a new dump, I'll mark it as so and may make a news post about it later, but I thought it would be worth investigating the code since we have a thorough SF-7000 IPL disassembly already, courtesy of Maxim. At this point I don't know if the "normal" Japanese SF-7000 unit uses this same 0.61 IPL or if it uses the IPL we know about, as I don't own a normal Japanese SF-7000. I have however confirmed from past auction photos that a normal Japanese SF-7000 has marking on the back. Some question I have: - Would be good to investigate the difference between this and existing IPL. - Do we have any clue from existing IPL about a version number and/or a date, to compare it to the version number (0.61) and date (1984.8.17) or this newly dumped one? SF-7000 IPL 0.61.jpg (462.75 KB) SF-7000 IPL [v0.61].zip (3.14 KB)

Bock Site Admin Joined: 08 Jul 2001 Posts: 8652 Location: Paris, France	Posted: Sun Feb 25, 2024 4:50 pm
	Attached are the photos showing the lots from when I bought it, for reference. 600x450-2016051800001.jpg (50.2 KB) 600x450-2016051800002.jpg (49.01 KB) 600x450-2016051800003.jpg (50.58 KB) 600x450-2016051800004.jpg (49.88 KB) 600x450-2016051800005.jpg (50.48 KB) 600x450-2016051800006.jpg (50.55 KB)

Maxim Site Admin Joined: 19 Oct 1999 Posts: 14745 Location: London	Posted: Sun Feb 25, 2024 5:29 pm
	The disassembly is at https://github.com/maxim-zhao/smsbioses/tree/master/SF-7000%20IPL . I don’t think there’s any kind of version notes inside it. I suspect many of the differences should be the font which is different between Japanese and Export releases of SC-3000 BASIC.

Maxim Site Admin Joined: 19 Oct 1999 Posts: 14745 Location: London	Posted: Sun Feb 25, 2024 8:08 pm
	I can confirm the only difference to the existing dump is the character font, as per https://www.smspower.org/Development/SC-3000Font, and then the final byte which is manipulated to make the checksum equal zero.

siriokds Joined: 10 Dec 2009 Posts: 115	My SF-7000 IPL ROM Posted: Tue Feb 27, 2024 12:00 pm
siriokds Joined: 10 Dec 2009 Posts: 115	My EU SF-7000 IPL uses a standard ROM and looks like this... IPL_MBM2764@DIP28.jpg (1.56 MB)

Maxim Site Admin Joined: 19 Oct 1999 Posts: 14745 Location: London	Posted: Thu Feb 29, 2024 11:00 am
	…that seems to be an EPROM.

Bock Site Admin Joined: 08 Jul 2001 Posts: 8652 Location: Paris, France	Posted: Thu Feb 29, 2024 2:52 pm
	siriokds wrote My EU SF-7000 IPL uses a standard ROM and looks like this... Could you confirm its CRC32 ? (mine is 8 KB, CRC32 d76810b8)

Maxim Site Admin Joined: 19 Oct 1999 Posts: 14745 Location: London	Posted: Thu Feb 29, 2024 5:50 pm
	Is there a way to easily confirm it? Peeking the last byte of the IPL will likely be different for any different IPL, is that easy to do from BASIC?

siriokds Joined: 10 Dec 2009 Posts: 115	Posted: Thu Mar 07, 2024 5:24 pm
siriokds Joined: 10 Dec 2009 Posts: 115	Bock wrote siriokds wrote My EU SF-7000 IPL uses a standard ROM and looks like this... Could you confirm its CRC32 ? (mine is 8 KB, CRC32 d76810b8) I didn't calculate but I did a file comparison. Mine it's a standard ROM.

siriokds Joined: 10 Dec 2009 Posts: 115	Posted: Thu Mar 07, 2024 5:26 pm
siriokds Joined: 10 Dec 2009 Posts: 115	Maxim wrote …that seems to be an EPROM. You're right. 8KB EPROM. I really don't know what "EPR" means.

Bock Site Admin Joined: 08 Jul 2001 Posts: 8652 Location: Paris, France	Posted: Fri Mar 08, 2024 10:58 am
	siriokds wrote I didn't calculate but I did a file comparison. You did a file comparison between which files? Did you confirm yours matched an existing one? You can run a SUM16 from Basic (all add bytes values from all 8 KB of the address space mapped to IPL, store total in a 16-bit value) and report that value too, it should be sufficient.

siriokds Joined: 10 Dec 2009 Posts: 115	Posted: Sun Mar 10, 2024 6:31 am
siriokds Joined: 10 Dec 2009 Posts: 115	Bock wrote siriokds wrote I didn't calculate but I did a file comparison. You did a file comparison between which files? Did you confirm yours matched an existing one? You can run a SUM16 from Basic (all add bytes values from all 8 KB of the address space mapped to IPL, store total in a 16-bit value) and report that value too, it should be sufficient. I confirm my IPL matches all bytes. SUM16 is $6C00

Bock Site Admin Joined: 08 Jul 2001 Posts: 8652 Location: Paris, France	Posted: Mon Mar 11, 2024 2:33 pm
	siriokds wrote I confirm my IPL matches all bytes. SUM16 is $6C00 Thanks, that matches the first IPL rom we have (and not the 0.61 one which is $7D00).

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