[Shoemanbundy]

So what this is saying is whatever the main terminal was that was the source of all the data that was transmitted across Sega Channel, it all came off of a single CD? :o

Now the question is do these CDs still exist anywhere.

[Overlord]

I actually remember reading this article. Really should get back around to indexing those MMS mags.

[doc eggfan]

Back


Front





Tried running it in my laseractive - had to dismantle it to get it to fit. Nothing happened, but most likely because I don't have any power plugged into it. Says it requires a 10V input, but I could only find 9V and 12V universal power packs when I had a look today.

Tried plugging it into my tototek writer and didn't get anything either. Not sure if it's safe to try it again when I find a suitable replacement power pack with the additional voltage running through it.

[Andlabs]

Chip spec: (note: for the NEC chips, change the first D to uPD or add a uPD at the beginning if absent before searching)

back, going from top to bottom, right to left
NEC D23C4000SCZ - 512KB ROM
BR6265 F-10LL - 8KB SRAM
Hyundai HY62256ALLJ-10 - 32KB SRAM; there's one on the front for a total of 64KB
nondescript chip marked "HC10 9319Y7" (not the name of a chip)
Microchip PIC16C54-RC/P - a PIC microcontroller, probably used for controlling the modem hardware
Kyocera HC1-TSE - 32Mhz clock (provides timing for the modem hardware, I guess)
"SB"? 3090C - <GerbilSoft> seemed to be a 1.8V hi-current regulator
NEC D65650GDE67 - "CMOS-6/6A/6V/6X 1.0-MICRON CMOS GATE ARRAYS" - some gate array with 21,120 gates
4x NEC 424400-70 - total 2MB (4x 512KB) DRAM

front, going from top to bottom, right to left
Motorola MC13055D - <GerbilSoft> wideband FSK receiver
another Hyundai HY62256ALLJ-10
some nondescript chip next to the Hyundai HY62256ALLJ-10
some nondescript chip underneath the battery
three more small nondescript chips next to D51, D52, and D53
another nondescript chip next to D52
2x 22 16T - no clue
2x Hitachi HM514800AJ7 - total 1MB (2x 512KB) DRAM

So clearly the ROM would need to be dumped, but that there's battery-backed SRAM in there suggests a possibility... we would need to figure out which of the SRAM chips it is and dump that (honestly though, I would dump everything, just to be safe)...

This post has been edited by Andlabs: 15 August 2013 - 11:50 AM

[ICEknight]

Andlabs, on 15 August 2013 - 11:49 AM, said:

So clearly the ROM would need to be dumped, but that there's battery-backed SRAM in there suggests a possibility... we would need to figure out which of the SRAM chips it is and dump that

And pray to god that it doesn't self-delete on start up.

This post has been edited by ICEknight: 15 August 2013 - 12:01 PM

[Meat Miracle]

Beautiful screenshot, but may I trouble you for a clearer picture of the front and the back of the cart?

Andlabs, on 15 August 2013 - 11:49 AM, said:

nondescript chip marked "HC10 9319Y7" (not the name of a chip)

74hc10 triple three-input NAND gate.

Andlabs, on 15 August 2013 - 11:49 AM, said:

"SB"? 3090C

SK for Sanken, see:
http://www.elnec.com...n/?manuf=Sanken

This post has been edited by Meat Miracle: 15 August 2013 - 02:17 PM

[doc eggfan]

Better?

[Andlabs]

(Also probably unnecessary but in my ideal situation I would also have that PIC chip dumped... unless there is a reason not to? "PIC cannot be dumped easily" is not a valid reason here)

[doc eggfan]

So is it safer for me to pass this on to someone with experience, or should I get a 10V power adapter and plug it in and see what happens?

[Meat Miracle]

Yup, those pictures are perfect. Can anyone look up the barcode?

If you try the machine yourself, pay attention to the polarity of the power adaptor plug!

[Kiddo Cabbusses]

Andlabs, on 15 August 2013 - 11:49 AM, said:

So clearly the ROM would need to be dumped, but that there's battery-backed SRAM in there suggests a possibility... we would need to figure out which of the SRAM chips it is and dump that (honestly though, I would dump everything, just to be safe)...

Oh dear, if this is more like Satellaview and XBand than US Sega Channel, we may need to dump multiple carts to get SRAM data!
Speaking of which...

[doc eggfan]

I've got another consolidated parcel from yahoo auctions building up, so I slapped the minimum bid on that one too.

[Kiddo Cabbusses]

Thanks. Having multiple carts may also help us in case one of them is actually bitrotted or some dumb stuff like that.

I'm really hoping there's some worthwhile ROM data to get out of this. It'd be great to compare it with the US Sega Channel, particularly since I don't recall the US one having any permanent storage whatsoever.

[Meat Miracle]

Kiddo Cabbusses, on 16 August 2013 - 10:15 PM, said:

Thanks. Having multiple carts may also help us in case one of them is actually bitrotted or some dumb stuff like that.

I'm really hoping there's some worthwhile ROM data to get out of this. It'd be great to compare it with the US Sega Channel, particularly since I don't recall the US one having any permanent storage whatsoever.

Mask roms don't get bitrot...

[LocalH]

Yea, only EPROMs can bitrot to the best of my knowledge. Mask ROMs actually have the data physically present, similar to the way that pressed CDs have the physical bits where burnt CDs use dye reflectivity.

SRAM might have something if the battery's not flat. I really think that getting JP Sega Channel menu ROMs is the main benefit to having these carts. From a software perspective, anyway.

This post has been edited by LocalH: 17 August 2013 - 12:57 PM