Hawk ramboard refuses 8mb ram

[Retrofan]

Originally Posted by rampartsagain

what i said is to buy one from a ebay seller that garantees it

No seller is going to try his ram in a Hawk ramboard, just because he doesn't have it. These were my thoughts about the last i bought:

Originally Posted by Retrofan

I've ordered another 60ns http://www.ebay.es/itm/320827288931?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
I like this part: Each SIMM is byte-by-byte Tested. Working 100% OK

The ram can be completely OK, but it won't work with the Hawk:

Originally Posted by Retrofan

Anyway he's told me that " I tested it with a professional memory tested, so I am 100% sure it is working. Maybe the problem is in your RAM board.I am 100% that the RAM SIMM I sent to you is completely as described."

As I say:

Originally Posted by Retrofan

- It's not my board: Too many users with the same problem.

- It's not the speed: " " and those speeds are supported.

- 8mb ram works: Some photos and some people running it (well... and the manual, the jumpers and .... it's printed in the board...)

- It doesn't exist a rev. C with any problem using 8mb (photo above).

- They made the Hawk when Edo didn't exist: My manual from 1993, Edo from 1995.

- They say to use the same ram of the A4000 and it says Ramsey isn't compatible with EDO.

Edit: I'm adding another:

- I've tried EDO rams 100% tested byte by byte.

[rampartsagain]

retro the probem is not because accel uses what look like edo but is quite diferent i think he could have tested in an ordinary old pc that is easy but what you should hear is ,i tested it on a ram car accelerator or in an amiga 3000 or a4000 that should have give you more tranquility

[Retrofan]

Well, today I've received four different 8mb rams from my seller of both kinds and... no one is working . I still have to receive the last I bought in Australia, but it seems my board isn't right.

I should know what is the chip that controls over 4mb and if I can change it, but I think they are programmed.

[rampartsagain]

BE COOL retro maybe there is some easy explanation don´t start dessassembling all
those expensive stuff may be taken with care,although if the chip is programmable and easy to disconect for you to sent me i am able to help you ,but first try to realise what is wrong,bad conections dirty socket and so

[Retrofan]

No dirty contact anywhere. If the last one (very similar to the ones I've seen working) doesn't work it has to be any of the chips. It has 4 chips on sockets. They are:
PEEL18CV8P -25. The 8mb jumper goes to this (to a pin) Edit: In this photo is different.
PEEL18CY8P -25
M6242B
PALCE22V10H-25PC74

But I suppose a working one has to be necessary if any is wrong.

[rampartsagain]

i think those are multiplexer chips, the right person you can ask is kipper2k he is knowledged the good thing is that they are regular components not programable and can be easely replaced

one other question is the shunt tend to rust with time try to clean them with isopropilic alcohol

[Retrofan]

Originally Posted by rampartsagain

the good thing is that they are regular components not programable and can be easely replaced

PEEL: Programmable Electrically Erasable Logic device.

And the part of Electrically Erasable means that any static electricity can affect them to... erase them.

http://pdf1.alldatasheet.net/datashe...18CV8P-25.html

I don't think anybody can help me . The only one would be somebody with a working one and a device to program another.

[rampartsagain]

retro i have a willem programmer if you can download the image saved on the chips and they are programmable i can burn the chips
thanks for the comments on my project

[rampartsagain]

i think willem can but have to check i see on internet that a programmer under software maxloader can do the job

[rampartsagain]

retro i have sent a message on a ebayer try to find out if willem can programme this cmos this is his item i think it is equal to the one on your board:

http://www.ebay.com/itm/18CV8P-25-Ma...item1c27718184

[rampartsagain]

this was the reply

Maybe the parts have program in it or you should reprogram it, sorry we don't know the function of the parts.

i will try another

[rampartsagain]

i tryed to email another if is a type of fpga or cpld it has to be done with a fpga programmer ,let´s wait for another reply

[rampartsagain]

well semms that that chip was manufatured in hell since till now nobody knows how to programe it i wil investigate further

[rampartsagain]

one answer till now:

if your programmer contains the part # in the system,that's okay,PLD is easy to programme

[FOL]

Originally Posted by rampartsagain

one answer till now:

if your programmer contains the part # in the system,that's okay,PLD is easy to programme

lol, thought you were spamming for a moment, .
You could use the edit function and edit all posts into one.

[rampartsagain]

Originally Posted by FOL

lol, thought you were spamming for a moment, .
You could use the edit function and edit all posts into one.

sory didn´t realise that

aparently there are some old machines on ebay with keyboard that manually program the 18cv8p pld,wich later substituted by cpld computer programmable logic device,the bad thing is that old stuff like this is heavy and expensive

i try to get unswer from this seller but no message til now i thinks is something like this

http://cgi.ebay.com/ws/eBayISAPI.dll...:X:AAQ:US:1123

[FOL]

I would have thought, you would have to be very unlucky to damage it statically.

[Retrofan]

Thanks for so much effort mate. Lol that programmer seems old... But how do you get the info of a working one?

If my last ram doesn't work (and I don't think so) I believe there are some guys with the same problem as me, and it got erased or something just touching it while inserting the ramboard in the Amiga.

Edit: Ah, yes Fol, but who knows what happens through so many years.

[rampartsagain]

but could heppen i remember about 15 years ago plug on a pc a ide cdrom while tower was on and the cdrom went to heaven,but this friend is with no luck if it is the 18cv8p 25l although i try to look on my willem but didn´t find this component ,also very strange if it is designed for 8m why can´t the board detect if appears 4mb

[rampartsagain]

the component it self is a bargain programming it is another story maybe could help to try who were this board developers to try to figure out the programming sequence on this chip
or in a electronic school try some teachers this stuff looks old school stuff
my friend i am your personal jesus christ try this page and do ,find on this page 18cv8p

http://www.preciolandia.com/mx/progr...-189mwz-a.html

then try to look this one on ebay

http://www.ebay.com/itm/New-Universa...item256cfbfe64

16/12/11 17:11: HOLA ,NECESITO SABER SI PROGRAMA 18CV8P Y AT 89S52 .
16/12/11 17:24 : El primero es un PEEL y no te lo soporta, pero te recomeindo usar al GAL16V8 que es mucho más versatil (la tengo disponible) con el 89S52 no hay ningún problema si te lo soporta. Saludos

i will try to see if wilems support GAL16V8H