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wiz.c file
#263692 - 09/02/11 05:49 AM
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This is in reference to: http://mamedev.org/source/src/mame/drivers/wiz.c.html
Sorry if I'm posting in the incorrect place. I'm new and trying to figure this forum and the ways things are done here.
In there it states this: - There is unknown device (Sony CXK5808-55) on the board.
I've been searching for info on this IC and have found it in the Ghosts n Goblins schematic.
It is a 1k x 8 RAM (I'm not 100% sure if it's considered bipolar or static...) in a 22 pin package. It's not in ChipDir or out on any of the datasheet sites I've found yet. Sony has no old datasheets on it either.
Code:
The pinout is this:
A6 - 1 22 - Vcc
A5 - 2 21 - A7
A4 - 3 20 - A8
A3 - 4 19 - A9
A2 - 5 18 - /CE
A1 - 6 17 - /WE
A0 - 7 16 - D7
D0 - 8 15 - D6
D1 - 9 14 - D5
D2 - 10 13 - D4
Gnd- 11 12 - D3
It's funny... Capcom used only 256 x 8 in that chip. The upper 2 address lines are grounded.
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Stiletto |
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They're always after me Lucky ROMS!
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> This is in reference to: http://mamedev.org/source/src/mame/drivers/wiz.c.html
>
> Sorry if I'm posting in the incorrect place. I'm new and trying to figure this forum
> and the ways things are done here.
>
> In there it states this: - There is unknown device (Sony CXK5808-55) on the board.
>
> I've been searching for info on this IC and have found it in the Ghosts n Goblins
> schematic.
>
> It is a 1k x 8 RAM (I'm not 100% sure if it's considered bipolar or static...) in a
> 22 pin package. It's not in ChipDir or out on any of the datasheet sites I've found
> yet. Sony has no old datasheets on it either.
>
> The pinout is this:
>
> A6 - 1 22 - Vcc
> A5 - 2 21 - A7
> A4 - 3 20 - A8
> A3 - 4 19 - A9
> A2 - 5 18 - /CE
> A1 - 6 17 - /WE
> A0 - 7 16 - D7
> D0 - 8 15 - D6
> D1 - 9 14 - D5
> D2 - 10 13 - D4
> Gnd- 11 12 - D3
>
> It's funny... Capcom used only 256 x 8 in that chip. The upper 2 address lines are
> grounded.
Thanks for bringing this issue to my attention.
This is also used in system1.c.
http://mamedev.org/source/src/mame/drivers/system1.c.html
Agreed that going by the numbering scheme for Sony part numbers in this series, it should be 1K x 8-bit. Still, not guaranteed.
Every other chip in that series is CMOS Static RAM.
Guessing "55" is the access time (55ns) - available online from Asian part resellers seem to be -45, -50, and -55 versions.
22-pin packages don't seem to be available in the rest of the series, although you do see it in the 4-bit CXK54* series. However, I looked at a few of those and the pinouts are different.
Thanks for working out the pinouts, this will probably be added to the source or at least to Guru's/The Dumping Union's chip documents, if it isn't there already. (Well, it's RAM, so it's not normally needed to be dumped, etc.)
I'll eventually check out a few other sources I have access to for datasheets, but yes - so far, nobody has the datasheets.
PS. I found this auction in case you need to buy some:
http://page2.auctions.yahoo.co.jp/jp/auction/b121957758
Rinkya: http://www.rinkya.com/new/en/auction-b121957758
- Stiletto
Edited by Stiletto (09/02/11 11:11 PM)
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| Stiletto |
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They're always after me Lucky ROMS!
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Re: wiz.c file
[Re: Stiletto]
#264187 - 09/07/11 11:50 PM
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Re: wiz.c file
[Re: Stiletto]
#264299 - 09/09/11 06:46 AM
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I emailed Sony and they had never heard of it. I'm assuming it's just too dang old for them to have in any books on their shelves. 
If I travel next week to the Bay Area, I'll stop by a shop that has a huge library of data books and see what I can find.
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| Stiletto |
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They're always after me Lucky ROMS!
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Reged: 03/07/04
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Posts: 6472
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> I emailed Sony and they had never heard of it. I'm assuming it's just too dang old
> for them to have in any books on their shelves.
>
> If I travel next week to the Bay Area, I'll stop by a shop that has a huge library of
> data books and see what I can find.
Lucky, they don't have any of those around me. 
You're looking for Sony Semiconductor IC Data Book (Memories) 1984-1988. 
With all those checked, then you can confirm it being undocumented.
- Stiletto
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| R. Belmont |
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Cuckoo for IGAvania
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Re: wiz.c file
[Re: Stiletto]
#264347 - 09/09/11 10:40 PM
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> With all those checked, then you can confirm it being undocumented.
I have an easier standard: "if Stiletto can't find it, it's undocumented".
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| Stiletto |
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They're always after me Lucky ROMS!
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Reged: 03/07/04
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Posts: 6472
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Re: wiz.c file
[Re: R. Belmont]
#264354 - 09/09/11 11:04 PM
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> > With all those checked, then you can confirm it being undocumented.
>
> I have an easier standard: "if Stiletto can't find it, it's undocumented".
Al said he might take a look then, in his copious spare time, as well.
At this point, we agree it's rather annoying that a simple RAM chip datasheet is not available. My gut feeling is this is out there, but not digitized yet.
- Stiletto
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Re: wiz.c file
[Re: Stiletto]
#264451 - 09/11/11 02:50 AM
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I stopped by an electronics store in the Bay Area today that has an extensive databook collection. They had a Sony book, but it was from the early 90s and it didn't have that chip in it.
Bummer...
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