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I have viewed a few video's which seem to point in the direction of the 2 IC's we have discussed. In one, the LVA510 is swapped out to correct a video issue, whether the same one i have or not is unknown.
This machine, as far as i remember, had a issue where the images would be fine but would...
I have managed to get some life out of this device and read the original IC from the 8 bit machine. Saving this out and comparing to the file i already have, shows them to be the same. RE-fitted the IC and reconnected to a TV but alas still no output than i can detect. The power LED is lit and...
@betwixt - I have sent the info as requested. thanks again.
I hear what your saying about the address issue but some of the software in the GitHub is supposed to 'redirect' this address (from what i have read) and should allow this to function correctly. I never really put enough time or effort...
Ok ,the plot thickens. I checked the few machines i still have and none have a parallel port. Easy, i'll grab one of Amazon !. It arrives, get fitted and setup. The Eprom software is expecting a LPT on 0x378, according to Device Manager it is using EFF8-EFFF or EFF0-EFF& but software says its on...
Well, just my luck to find this programmer is, it looks , a parallel programmer taking external power from a barrel jack or usb. I dont think i have a parallel port machine or a expansion card (Not sure if a parallel to USB convertor would work ?). I saw the USB port and wrongly assumed it could...
Hi
The IC is for an 8 Bit MSX computer, i suspect this may have gotten corrupted over time and the machine is not displaying to a screen although preliminary testing shows out puut on a cheap oscilloscope. It may not be this and may very well be the 'LVA 510' chip which i understand does some...
i have ordered another programer as i cant get the first one to recognise the IC, perhaps ill have better luck with the new one and can progress further. It should arrive shortly and i'll give it a go. Then just need to find a reasonably priced replacement.
I had'nt looked at it but it a Microsoft product. I can see the line near the end i think you are referring to, but this is the file the original user has uploaded to their site ( with several others)
https://download.file-hunter.com/System%20ROMs/ROM's%20RepairBas/ - Please use...
Hi, sorry was onto other things for a while. Got CO2 laser not in good health. :)
Yes i downloaded an image for the bios, which came from someone who used the image succesfully for his own machine.
I would of thought, because all the labels are removed, the existing ROMs have been cleared and...
@betwixt - i am not too far from you i beleive, and agree the sun is in short supply at the moment. But when it comes who would be anywhere else.
I think it will be best to get a "non UV"replacement, they dont break the bank so the Wife shouldnt object :)
@dick_freebird thanks for the...
Hi and thanks for the reply
This is likely to be a one-off job and i dont want to invest in UV lighting if there is an alternative. Could you recommend a replacement that could be flashed with this Programmer i have and, is a direct replacement for the old one please?
your help is appreciated.
Hello
I hope this the correct place to post this, feel free to move it if not.
Please excuse my ignorance but i require some knowledge please. I have an old 8 bit computer which i believe needs the BIOS Rom replacing, my intention is to replace it with an Eprom and flash it myself. I have...
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