MMC/SD Drive V2.2

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Por Gradius2

Hero (574)

Imagen del Gradius2

20-02-2010, 14:01

Don't worry man Wink
eBay seller: atmel 24C040A DIP 5 pieces->18$ (shipping cost not included)
stock: 250

The big problem is a "virgin" one wouldn't do a thing (my guess), since you need to program it (Atmel) before to accept any firmware (via MSX) in first place.

I didn't reversed the firmware to know for sure, but I'll found out.

What's the eBay link? I didn't find in any place.

Por Gradius2

Hero (574)

Imagen del Gradius2

20-02-2010, 14:34

Btw, the two possible chips are only: AT29C040A or W29C040A

You posted "24C040A" in which is incorrect.

Found this guy:
http://cgi.ebay.com/A04-29C040%2F15-X5-18.00$_W0QQitemZ260554207928QQcmdZViewItemQQimsxZ20100219?IMSfp=TL100219123017r16778

He uses a very confuse code, very hard to find.

Winbond:
http://cgi.ebay.com.sg/10x-Winbond-29C040-W29C040-90-512K-x-8-EEPROM_W0QQitemZ250558770749QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3a56776e3d

But isn't "A" at the end, I wonder what's the difference.

Por Manuel

Ascended (16021)

Imagen del Manuel

20-02-2010, 15:58

Actually, I forgot to ask sunrise in Nijmegen about that SCC+ card... I don't remember seeing anything of it either, but that could just be me (I didn't look for it).

Por Gradius2

Hero (574)

Imagen del Gradius2

20-02-2010, 20:50

Sinfox told me its ok, just need to use atload.com to reprogramming a new one, so no need an eeprom programmer.

However I don't know if Winbond is fully supported by ATLOAD, but if it uses the same programming protocol, so probably yes.

Checking ATLOAD I could only find descriptions about Atmel on it, nothing about Winbond.

Por Gradius2

Hero (574)

Imagen del Gradius2

20-02-2010, 21:41

Checking FAT thing, its funny it can only see "23MB" instead "32MB".

FAT12: 32MB (max supported)
FAT16: 2GB (4GB with 64KB clusters)
FAT32: 2TB (8TB with 32KB clusters and 16TB with 64KB clusters)

Por usuario_msx2

Paladin (745)

Imagen del usuario_msx2

28-04-2010, 18:03

Sinfox/Sharsym dual sd card with SCC and 512k flashrom added to my f9s ok
9958 ok
512k ram ok
z80 6mhz (W.I.P)

http://www.flickr.com/photos/44218601@N06/sets/72157623824772599/

Por Gradius2

Hero (574)

Imagen del Gradius2

15-08-2010, 03:51

Hey sinfox, I have sent e-mails to you, did you received them?

Por Gradius2

Hero (574)

Imagen del Gradius2

23-08-2010, 14:43

Someone else here produce this PCB complete w/o SCC IC (v2.2 or better)?

I need at least one, and I don't want to spend a lot just to buying all the tools necessary to create just a single PCB to me.

Contact me: freyesm1 a t gmail

Por Gradius2

Hero (574)

Imagen del Gradius2

25-08-2010, 19:02

Okay, now I'm looking for just the PCB.

Por Gradius2

Hero (574)

Imagen del Gradius2

27-08-2010, 13:34

A mere scan from pcb (front & back) will also works, since the public diagram is incomplete.

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