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Type: Posts; User: SkyCaptain

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    Hi Dave_M, I have bought a couple of 2732A, the...

    Hi Dave_M, I have bought a couple of 2732A, the are by Hitachi and labelled HN482732AG-20. My software doesnt have a mode for this specific chip/manufacturer, but the Datasheet notes that its...
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    So this is going to be a long shot, but the...

    So this is going to be a long shot, but the chinese company who built my programmer is still constantly upgrading the software with at least one update per month. Since i have it, they have added...
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    Hi Daver2, The Chips im using have TMS 2532A-45JL...

    Hi Daver2, The Chips im using have TMS 2532A-45JL on the front, and JL2532HS written on the back. So im taking that these are 21V chips, and thats the setting i burned them on.

    Hi Dwight, So if...
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    Hey again, so its kinda weird, the adapter built,...

    Hey again, so its kinda weird, the adapter built, the EPROM burner gives me a "VPP over current protection" "External short or IC socket reversed". But the EPROM burner does read the chip, and can...
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    Hey Guys, How has everyone been? I have finally...

    Hey Guys, How has everyone been? I have finally built my adapter, and think im ready to Burn some ROMS.
    First i think i want to make it as original as possible, and i think this machine was running...
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    Hi daver2, yes, i have let it run and it...

    Hi daver2, yes, i have let it run and it continues to pass the test. I left it on for 40mins. So it looks like the memory is fine.

    SkyCaptain
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    The First number stays but the other change. So i...

    The First number stays but the other change. So i guess that means the ROM's are busted?

    I guess i will try to order an other 16K of RAM and the parts to build the adapter to program 2532 EPROMs...
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    Alright, Removing the 2nd memory bank, nothing...

    Alright, Removing the 2nd memory bank, nothing happened. So i replaced all the chips from the 1st row with the chips of the 2nd row, and now the computer would pass the test on to the next stage. The...
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    Hey guys, im back. Sorry there was some family...

    Hey guys, im back. Sorry there was some family drama I had to deal with last week, but everything is on track again so im can go back to looking at this little project.

    Anyways, the ram is bad....
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    And Success! We are running the PET TEST and the...

    And Success! We are running the PET TEST and the results are. Well, i doesnt pass the first test if read the documentation right. Ill add a picture. I hope the resolution is high enough.

    61447
    ...
  11. Replies
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    Hi dave_m, no i do not have a timer for my UV...

    Hi dave_m, no i do not have a timer for my UV light as im not using the actual tool to do the job. I did do it carefully and checked every 10 minutes by reading the chip to see if it was all empty. I...
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    Alright, thank you dwight, with your explanation...

    Alright, thank you dwight, with your explanation about having to tell the Hex file where to start, i was able to load it properly and the "preview" of the code looks as far as I can tell, the same...
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    Yeah ok, i think i have found the issue although...

    Yeah ok, i think i have found the issue although i dont really understand enough to solve it.
    in the archives of this Forum, i found a conversation which im going to copy paste a few bits out of. ...
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    For the connection testing of the 6520 i tested...

    For the connection testing of the 6520 i tested both the pins to the part, and then also the pin of the socket on the back side of the board. So i think i did both. I still havent traced down the two...
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    Alright, my first attempt of burning a 2716 chip...

    Alright, my first attempt of burning a 2716 chip failed. I tried to Burn daver2's PETTESTER. I will attach pictures if i figure out how. Im not entirely sure what i did wrong, an im not entirely sure...
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    Hey all, im back and now have everything i need...

    Hey all, im back and now have everything i need to start burning EPROM's.

    Just to clarify though, when i burn the PETTESTER on to the 2716, i dont need to make an adapter to plug it into the...
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    So this is gonna a be a long post. Armed with...

    So this is gonna a be a long post.
    Armed with the schematics and my multimeter, im tracing all the Pins of the affected socket C7 to their respective part, and measuring the resistance on the...
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    Im realizing that i probably need a EPROM eraser...

    Im realizing that i probably need a EPROM eraser too, and these 1 month shipping times from China are just killing me. And trying to find anything EPROM related in Switzerland is almost impossible....
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    Hey Daver2 Thanks for the link! About...

    Hey Daver2

    Thanks for the link!
    About ordering the 2716 chips. I found these new chips here...
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    Hey everybody, im still working on the task given...

    Hey everybody, im still working on the task given by Dwight of tracking down all leads from 6520 in C7. Im at Pin 34 now but i have to call it a day, i will post the full results tomorrow when i type...
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    So i am ordering a few Parts. About the 40-Pin...

    So i am ordering a few Parts. About the 40-Pin socket, I read that the precision sockets, the ones with a round pin hole and contact all the way around are the best. I will get enough to possibly...
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    So i dont know how to edit my post, but about...

    So i dont know how to edit my post, but about seeing a black screen, it is black. with sometimes a single random character on it. Also when i turn off the machine and turn it on again within 2 or so...
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    With all the chips back in place and power OFF, I...

    With all the chips back in place and power OFF, I flipped the board and checked the resistance between the two pins with my multimeter set to 20K and measured 2.86kOhm. I measured the same on top of...
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    Alright, im trying to reply to everyone in a...

    Alright, im trying to reply to everyone in a single comment.

    First, i understand now about the pins on J7. Im still struggling when a single component is split up in many parts of the schematics...
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    The resistors look ok and all register a...

    The resistors look ok and all register a resistance of 9.8K

    the # is not consistent anymore, but there is more often than not a single random character on screen.

    no flashing curser

    About...
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