RAM Error on 2 slot MVS
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Nightmare Tony
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Cartridge cleaning won't help out at all The $8000 video RAM is the fast sprite RAM, the trwo TMM2018 or CXK5816 RAM chips. Since the output is $0000, both RAM chips are blown. Those always blow out first on a voltage spike. Replace your power supply and put in a line filter, to help.
the two video RAM chips are NEVER flat pack chips. They will both be located by the LSPC A0 or A2 chip.
TMM2018s will work great.
the two video RAM chips are NEVER flat pack chips. They will both be located by the LSPC A0 or A2 chip.
TMM2018s will work great.
Nightmare Tony
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They are the CXK5814 (got mixed up, its been ages, sorry).
thje Work RAM is the CPU 32K of RAM. I forget the number, but they arte two flat packs, usually located right next to SPU2 on the 2 slot. The RAMS are ordered as such:
Work Ram: CPU scratch pad RAM (2 ram chips, lo & hi)
Battery RAM: battery backed RAM, same kindof chips as work ram
Video RAM $00009 another dual set, this ones found by the a)., They are used for the sprite location table, color pallette and text locations. They will give an $0000 error instead of $8000 error.
Fast video RAM (CXK5814). This pair was described up above in a previous post. Holds the sprite graphics picture. the pixel buffer RAMS are inside of the B0 and C0 chips.
Sound RAM: another CXK or a TMM2018 can be used here. WILL NOT give an error to identify it, it will merely come out with the Z80 error.
Forgot, you can replace a single CXK by using a TMM2018. They work just fine.
thje Work RAM is the CPU 32K of RAM. I forget the number, but they arte two flat packs, usually located right next to SPU2 on the 2 slot. The RAMS are ordered as such:
Work Ram: CPU scratch pad RAM (2 ram chips, lo & hi)
Battery RAM: battery backed RAM, same kindof chips as work ram
Video RAM $00009 another dual set, this ones found by the a)., They are used for the sprite location table, color pallette and text locations. They will give an $0000 error instead of $8000 error.
Fast video RAM (CXK5814). This pair was described up above in a previous post. Holds the sprite graphics picture. the pixel buffer RAMS are inside of the B0 and C0 chips.
Sound RAM: another CXK or a TMM2018 can be used here. WILL NOT give an error to identify it, it will merely come out with the Z80 error.
Forgot, you can replace a single CXK by using a TMM2018. They work just fine.
HPMAN
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Seems TMM2018 is from Toshiba, Motorola offers an MCM2018A, are they the same ?
Also come by HM65728 (temic) and 7C128 (cypress) which are 2K x8 SRAMs with compatible pinout.
Pinout of the TMM2018 :
1 A7 VCC 24
2 A6 A8 23
3 A5 A9 22
4 A4 /WE 21
5 A3 /OE 20
6 A2 A10 19
7 A1 /CS 18
8 A0 D8 17
9 D1 D7 16
10 D2 D6 15
11 D3 D5 14
12 GND D4 13
Edit : 6116 SRAM chips seems just the same and are way more easy to find
[ February 26, 2002: Message edited by: HPMAN ]</p>
Also come by HM65728 (temic) and 7C128 (cypress) which are 2K x8 SRAMs with compatible pinout.
Pinout of the TMM2018 :
1 A7 VCC 24
2 A6 A8 23
3 A5 A9 22
4 A4 /WE 21
5 A3 /OE 20
6 A2 A10 19
7 A1 /CS 18
8 A0 D8 17
9 D1 D7 16
10 D2 D6 15
11 D3 D5 14
12 GND D4 13
Edit : 6116 SRAM chips seems just the same and are way more easy to find
[ February 26, 2002: Message edited by: HPMAN ]</p>
Nightmare Tony
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Jarod: I gave the information in your other post about the 4 slot. Since its a long one, I wont replace it.
The MCM2018A will work just fine. I always prefer the TMM2018 part, myself. Its jjust me, I guess.
Never tried a 6116. If the speed is -35 or less, it should work. Always thought there were some speed issues since this is the mildly fast RAM (the REALLY fast RAM is located insiude of B0 and C0, and when IT goes bad, you will see dots in your screen sprites.
The MCM2018A will work just fine. I always prefer the TMM2018 part, myself. Its jjust me, I guess.
Never tried a 6116. If the speed is -35 or less, it should work. Always thought there were some speed issues since this is the mildly fast RAM (the REALLY fast RAM is located insiude of B0 and C0, and when IT goes bad, you will see dots in your screen sprites.
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WOW,
Finally someone here who knows the inner workings of the MVS... Nice to see you Tony, however 90% of the time you are talking over my head hehe, I hope I don't ever need your help, but glad you are aboard!
-Nick
Finally someone here who knows the inner workings of the MVS... Nice to see you Tony, however 90% of the time you are talking over my head
hehe, I hope I don't ever need your help, but glad you are aboard!-Nick
Nightmare Tony
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(blush). There IS a reason for knowing the system, trust me on this one . For 5 years, I had the joy of answering the phones with: "SNK service here, may I help you?"
One thing I miss out of it: 4 player Thrash Rally rounds during the breaks. Sigh.
. For 5 years, I had the joy of answering the phones with: "SNK service here, may I help you?"One thing I miss out of it: 4 player Thrash Rally rounds during the breaks. Sigh.
what does the linking feature do?
Ill ask tony this.
I have a neo geo 2 slot motherboard. When i view the audits section in the softdip settings, it shows a list of games from slot 1 to slot 8 and gives me the name of the game how many times it was played etc. remember that this is on a 2 slot board!
question is, does this have to do with the linking feature i read about so often (and find so little info about)?
if so, how do i use it? id love to daisy chain a few 4 slot boards together.
Ill ask tony this.
I have a neo geo 2 slot motherboard. When i view the audits section in the softdip settings, it shows a list of games from slot 1 to slot 8 and gives me the name of the game how many times it was played etc. remember that this is on a 2 slot board!
question is, does this have to do with the linking feature i read about so often (and find so little info about)?
if so, how do i use it? id love to daisy chain a few 4 slot boards together.
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The Neo saves bookkeeping and high score data for up to 8 games. That goes for one slots on up.neomvsfan said:
There may be some info on the linking cart on HardMVS.com if you want to look. They use a special kind of cart (that you run cables from one cart on one board to the other), and I believe dips 4, 5, and 6, though I'm not completely sure on that one.
chris1
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Glossary
Link-Up Feature
Several of the early Neo Geo AES releases featured a socket on top of the home cartridge that allowed two home systems with the same cartridge to be linked together for up to 4-player action. For a long time there was a belief that no such cables were made, however a number were created in included beneath the trays of at least some link-up games (Riding Hero is the confirmed game, see picture). The three games were League Bowling, Riding Hero, and Thrash Rally. For an extended discussion about the Link-Up Feature, please see THIS thread.
Check out the threads "within" this thread...(for MVS etc.
http://www.neo-geo.com/forums/showthread.php?t=86118&page=1&pp=25
One of these days i'm going to link up three or 4 cabs together..
Link-Up Feature
Several of the early Neo Geo AES releases featured a socket on top of the home cartridge that allowed two home systems with the same cartridge to be linked together for up to 4-player action. For a long time there was a belief that no such cables were made, however a number were created in included beneath the trays of at least some link-up games (Riding Hero is the confirmed game, see picture). The three games were League Bowling, Riding Hero, and Thrash Rally. For an extended discussion about the Link-Up Feature, please see THIS thread.
Check out the threads "within" this thread...(for MVS etc.
http://www.neo-geo.com/forums/showthread.php?t=86118&page=1&pp=25
One of these days i'm going to link up three or 4 cabs together..
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Links from hardmvs.comchris1 said:
http://www.hardmvs.com/images/linkCable/neoLinkFront.jpg
http://www.hardmvs.com/images/linkCable/neoLinkBack.jpg
So the MVS games listed have this socket on them? I may have to pick a couple up.
chris1
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fenikso said:
Yes:
League Bowling
Thrash Rally
Riding Hero
and some Kizuna game that I never saw..
The MVS carts will have two ports on them,clearly visible near the label(AES carts one port)
Though I have seen carts with the ports ripped out and stuck in a case pressed over the ports..re-cased .
Yaton sells these games sometimes re-cased with the ports not shown..if you get lucky you can drill the holes in the case and have the ports coming back through the cart again(I did)
Now if he rips the ports out then linking the cart isn't happening..
Just make sure that when buying those carts look for the port holes.
Should look like this
http://hardmvs.com/labels/images/us/leagueBowlingUS.jpg
It's been along time since I've done a link up.
but you can like MVS to AES as long as the MVS has a Unibios chip as you have to change the settings in the MVS,bios to match the AES setting..I think it's setting the bios to Home,Console or something like that to match the AES...I figure if the ARE has a Uni bios type chip then to could set it to Arcade mode to match the MVS.
For some reaso if you don't do this the systems don't detect the link up..
MVS to MVS the Region setting has to be the same..US to To US etc....I'm not sure on the dips anymore.(need to look at my sheet like the one on Hard MVS.)
I'm going to link my AES to MVS and MVS to MVS next week(take pitures) and rewrite how I do it..
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It's a bus buffer.
Look at the surface mount sram chips (62256 or equivalent part #) that are connected to the LSPC chip... one of those is bad or has a bad trace between it and the LSPC chip giving you the video issues...
Look at the surface mount sram chips (62256 or equivalent part #) that are connected to the LSPC chip... one of those is bad or has a bad trace between it and the LSPC chip giving you the video issues...
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That video RAM error is an error inside one of those surface mount SRAM chips connected to the LSPC too... It's not going to be a bad trace since it doesn't start at a zero boundary but rather farther inside the chip.
RJ
RJ