Re: help with buying sram 32 dip chips
Posted on 2023-02-12, 11:50
thank you jason 😀
Re: help with buying sram 32 dip chips
Posted on 2023-02-11, 13:19
hello all, i bought the nec sram chips and arrived today, took the old chips and replace with new ones and the it passed it ram test and added the main amiga memory and works no issues 😀
Re: help with buying sram 32 dip chips
Posted on 2023-02-09, 19:01
and thank you for every one for the help and also all the clarification will let you all know when the chip has arrived and worked
Re: help with buying sram 32 dip chips
Posted on 2023-02-09, 18:54
mkarcher wrote on 2023-02-09, 18:53: Robhalfordfan wrote on 2023-02-09, 18:48: ok, i am guessing that a yes Yes, the NEC chip will work as drop-in replacement. No further modifications required. that's good to look the person i got this from maybe thought that and future proof it in a way
Re: help with buying sram 32 dip chips
Posted on 2023-02-09, 18:48
oh ok, yeah, i was looking at it from wrong perspective as you said, thanks for the clarification and as you said the nec chips should be safe to use and what will the bodge wires make the CE2 pin on the nec pins do, if anything The old chip in you accelerator card only respond to read and write …
Re: help with buying sram 32 dip chips
Posted on 2023-02-09, 09:19
ok i should be safe use buy use the nec chips without any problem and will the wires make the ce on pin 30 on the nec chip, pull low or high and thought it was ground pin the wire is going on the 68882 which the trace is going to NC pin (maybe i am looking at wrong datasheet) You look at the right …
Re: help with buying sram 32 dip chips
Posted on 2023-02-08, 21:15
it could be but when looking for pcb traces at pin 30 - looks like there isn't and the wires gives it the traces and pulling that pin high - correct me if i am wrong The bodge wire puts all pins 30 in parallel. It also connects these pins to a pin of the 68882. According the data sheet, that is the …
Re: help with buying sram 32 dip chips
Posted on 2023-02-08, 09:31
ediflorianUS wrote on 2023-02-08, 09:21: could the repair job be the main problem? it could be but when looking for pcb traces at pin 30 - looks like there isn't and the wires gives it the traces and pulling that pin high - correct me if i am wrong
Re: help with buying sram 32 dip chips
Posted on 2023-02-08, 00:29
how can find out if there is conductivity with pin 30 and pin 32 etc There are two ways to do it. Either you use a (digital) multimeter in "resistance measurement" (should display near zero) or "continuity check" (should beep) mode, or you inspect the board carfully, looking for PCB traces leading …
Re: help with buying sram 32 dip chips
Posted on 2023-02-07, 17:03
Next the I/O lines are labeled 0-7 on the Inova datasheet but 1-8 on the NEC one. That's probably more naming convention than anything else. Not just "more" a naming convention, it is only a naming convention. That's perfectly fine. What I'm worried about are pins 22 and 30. On the NEC chip they're …
Re: help with buying sram 32 dip chips
Posted on 2023-02-07, 14:27
The devil is in the details. "Little differences" could mean the difference between working and smoking. Smoking isn't going to happen here, Vcc corresponds, as does Vss = GND. Next the I/O lines are labeled 0-7 on the Inova datasheet but 1-8 on the NEC one. That's probably more naming convention …
Re: help with buying sram 32 dip chips
Posted on 2023-02-07, 11:54
"Supply Voltage" is the relevant value here. This says it needs 5VDC+-10%. So any similar 5V chip would work fine. If a chip indicates "Min 2.97 Max 3.63" then it's a 3.3V part and might get fried. So long as the Max is 5.5V it will be fine. ok looks the chip in link above (nec chip) might work as …
Re: help with buying sram 32 dip chips
Posted on 2023-02-07, 11:04
if not does the voltage has exactly the same as old ones and assuming the pinout has to exactly the same Those kind of chips exist in basically two voltage versions: Standard Voltage is meant to run ogf a 5V supply and Low Voltage is meant to run off a 3.3V supply. Low Voltage chips tend to habe an …
Re: help with buying sram 32 dip chips
Posted on 2023-02-07, 10:14
i am an amiga 500 plus with an mega midget racer accelerator and not sure it sram chips are dead because it fail is test at memory location 01000000-0107ffff and looking online for replacements and having a difficult time the current chips in it are Inova s128k8-100cc the manual says this "Sockets …
Re: help woth buying sram 32 dip chips
Posted on 2023-02-07, 09:07
There are plenty of 32 pin sram on ebay but which package type used? You have not mentioned which and if there pictures this would help. Yes 1Mb (bits). Correct for 128k x 8 bit srams. Your board uses 32pin DIP package and this one is 70ns, perfect for yours. Qty of 2, order lot of 2 to get 4 chips …
help with buying sram 32 dip chips
Posted on 2023-02-06, 21:50
i am an amiga 500 plus with an mega midget racer accelerator and not sure it sram chips are dead because it fail is test at memory location 01000000-0107ffff and looking online for replacements and having a difficult time the current chips in it are Inova s128k8-100cc the manual says this "Sockets …
Re: mobo upgrade
Posted on 2023-01-25, 16:14
Fair enough, I never doubted you was just interested in the titles and now you mention it I think I've read before Bug's life is a picky game. Both those games recommend a computer around the 200/300Mhz mark so a late P2 early P3 is probably the right area in either Slot 1 or S370 format. on the …
Re: mobo upgrade
Posted on 2023-01-24, 13:40
I would have thought you were well covered with a 233MMX covering early Win9x games and the P4 covering the later, which games are causing trouble? If it was me I'd bite the bullet and go down the ATX route as this opens up easier to obtain and better designed newer cases and PSU's Plus if you have …
Re: mobo upgrade
Posted on 2023-01-24, 13:15
Most Slot1 (and SS7) AT boards accept ATX PSU also, I have used that way many times. Either change out power switch or use reset switch as ATX power switch. assuming is not that diffclut since at power switch is conncetd to psu and simple as unscrewing and taking it out along at pus and replacing …
Re: mobo upgrade
Posted on 2023-01-24, 10:53
- baby AT boards exist, but they are harder to find and the ones you do find tend to be low-end mess as well. There are exceptions (Asus P2B-B etc), but good luck finding one. - AT boards accept AT PSU. The CPU will draw more power, so the PSU had better still be good. - modern PSUs can have issues …
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