User avatar
Hook
Ottawa, Canada

Posted Mon Apr 04, 2022 12:13 pm

Yup, that's the next step.

User avatar
Signman

Posted Thu Apr 21, 2022 12:27 pm

How did your project end up Hook?
Mine is giving green screen and not quite sure if also blue. Using pistorm and regular 68000 no difference. I think it is seated as well as possible

User avatar
A1-X1000
Toronto, Canada

Posted Thu Apr 21, 2022 2:31 pm

Signman wrote:
Thu Apr 21, 2022 12:27 pm
How did your project end up Hook?
Mine is giving green screen and not quite sure if also blue. Using pistorm and regular 68000 no difference. I think it is seated as well as possible
+1 I'm still waiting to get my parts but interesting to see other members builds in the mean time :boing: <3

quick question: what dram speed are most using?

User avatar
Signman

Posted Fri Apr 22, 2022 7:13 am

1 meg Dip 20 Memory 256 x 4
Toshiba TC514256AP-80 Fast Page Dynamic Ram
Fast Page DRAM, 256KX4, 80ns, CMOS, PDIP20

User avatar
Hook
Ottawa, Canada

Posted Sat Apr 23, 2022 3:16 am

Signman wrote:
Thu Apr 21, 2022 12:27 pm
How did your project end up Hook?
Mine is giving green screen and not quite sure if also blue. Using pistorm and regular 68000 no difference. I think it is seated as well as possible
No progress on my end. I removed the Agnus with a PLCC extractor, cleaned the pins with a pencil eraser (must get a fiberglass pen!) and reseated the Agnus in the socket an still get a green screen.

I am waiting for a new Agnus to see if that's the issue. I also sourced a complete A1000 motherboard for a crazy good price from a seller in Toronto, so that should serve me as a good test bed instead of always plugging/unplugging original daughterboard and Rejuvenator as well as original 68000 cpu and PiStorm when testing

Patience is key when it comes to this kind of stuff :lol:
A1-X1000 wrote:
Thu Apr 21, 2022 2:31 pm
Signman wrote:
Thu Apr 21, 2022 12:27 pm
How did your project end up Hook?
Mine is giving green screen and not quite sure if also blue. Using pistorm and regular 68000 no difference. I think it is seated as well as possible
+1 I'm still waiting to get my parts but interesting to see other members builds in the mean time :boing: <3

quick question: what dram speed are most using?
I am using Samsung KM44C256CP-7 and also have a spare set of KM44C256CP-6, so 70 ns and 60 ns, respectively. You can go as high as 100 ns I believe without any issues, but the higher the memory speed, the more power the board will consume.

User avatar
Signman

Posted Sat Apr 23, 2022 5:51 am

Patience is the key. The understatement of the year for me. I may have further developed my soldering skills even desoldering my mistakes which would be the only plus.
When the board doesnt work there are infinite reasons like:
Not inserted fully or possibly some pin bent you cant see.
Bad chip or counterfeit.
Bad soldering on pin or incorrect.
Without being more knowledgeable or able to use testing devices people like me in end will just surrender.
Hobbies are supposed to be fun or satisfying in some way. After a month, not seeing it.

Sorry if I sound like a downer, needed to vent.
Maybe some day I will send it off for more expert review.

User avatar
A1-X1000
Toronto, Canada

Posted Tue Apr 26, 2022 8:39 pm

Hook wrote:
Sat Apr 23, 2022 3:16 am

I am using Samsung KM44C256CP-7 and also have a spare set of KM44C256CP-6, so 70 ns and 60 ns, respectively. You can go as high as 100 ns I believe without any issues, but the higher the memory speed, the more power the board will consume.
Thanks for info ..didn't know you could mix dram speeds...another question I have is where to find additional 48-pin sockets to build the height up on the mainboard before equiping the rejuvenator....cant seem to find these??

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obitus1990
USA

Posted Wed Apr 27, 2022 11:17 am

48 pin machine sockets here.

User avatar
A1-X1000
Toronto, Canada

Posted Wed Apr 27, 2022 5:40 pm

obitus1990 wrote:
Wed Apr 27, 2022 11:17 am
48 pin machine sockets here.
thanks!
also can't find SN74ALS245AN , SN74ALS244CN, SN74LS393N

User avatar
A1-X1000
Toronto, Canada

Posted Wed Apr 27, 2022 6:11 pm

Hook wrote:
Sat Apr 23, 2022 3:16 am

I am using Samsung KM44C256CP-7 and also have a spare set of KM44C256CP-6, so 70 ns and 60 ns, respectively. You can go as high as 100 ns I believe without any issues, but the higher the memory speed, the more power the board will consume.
PM sent...let me know how much you want for the spare ram set you have





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