I am learning about programmable ROM, and it all looked science fiction that a circuit can be modified after it is etched, so i looked up on youtube if there is any demo of ROM getting reprogrammed, and here i am landed. Safe to say this is mind-blowing and stuff and how much we have achieved as a humanity. Still unsure of nitty-gritty detail on how it gets reprogrammed, but i guess one cannot learn everything there is to learn!
great info, ordered 5 28 pin for some tinkering on an obd 1 vehicle and this helped me get a few things including a chip puller not a flat screwdriver! haha
Nice little eprom eraser! Be aware of the bent over copper tape though, it might connect your pins on the one side of your eprom because the glue used on this tape is electrically conductive! Keep up your great videos. 👍 btw First 😀
Is there a way to extract what is on an EPROM, and then open it so the data can be modified? I have a 1990s computerized sewing machine, and I would love to be able to modify the menus and stitches, which I believe are all stored on the EPROM.
yes and no. This is reverse engineering. Some ROM will allow you to change then but others will crash. if you just want to change PFAFF to IMSAI as text, that would be easy to try. modifying the stiches would be a lot of investigation.
Woow that's amazing video there💜 Sir i have a weird question..what's the brand name of that blue pen in 07:02😂😁 I used it in my childhood (elementary school) very much and i'm wondering if it's being manufactued till now..
Hi! I see you're knowledgable about these chips and come asking for advice. I've come into a rather large collection of various Microchips via a bulk liquidation purchase of electronics. I only have about 7 of these types, but I have Dozens of other types and some types hundreds of them. To name just some of them(They come in long anti-static sticks of 25/40/50/etc. each) I have MCV's, ADC's, PLD's, MUX's, Counters, Darlington Arrays, Octocouplers, D latch's, RS232's, Quad Amps, OP AMP's, Shift Reg's, , LM2931M-5.0 5v LDO,Flip Flops, Dual OPAMP, Buffer XCVR's. Each of these sticks probably has 20-50 chips in them, all Brand New, and I have sooooooo many other types too. Brands like Texas Instruments, Analog Devices, SPARTAN, Motorola, ATMEL, Pericom, MAXIM Inegrated Products, etc. In addition to these chips, I also have hundreds of what I assume are the "housing units?" that these chips' pins fit into before being mounted on a PCB. My question is this, I look online for these chip's selling prices, most go for $2-$5 each, but some I see sell for $10-$25 each, some buyers shelling out $500 for a 20 strip of the same chips I have. However, I've listed several of them for sale on Ebay at well below market rates, and have had 0 luck with selling any of them(I can reply with a link to one of my listings if you're OK with that). I'm unsure if I'm labeling them wrong, or if there's some secret Microchip selling forum that I should join? Thanks for reading, and I look forward to reading your or other experienced individual's answers! David
@@IMSAIGuy Hi! Thanks for the prompt reply. Yea I suppose I should sell them in their full strips rather than singles. I'm rather hesitant to sell some of the larger tubes of chips for a buck though? For example, I see stuff like Motorola MC68HC811E2FN--2C16J 8-bit 52-Pin Microcontrollers. I see someone paid $1.3K for 180 of them as recently as august of 2020, while others have bought them at $300 for 50. I only have 23 of these, but even listing them for $5 each I haven't had a single sale. Maybe I'd do better if I listed them well below other sellers at 23pc for $50? Honestly the most daunting task is reading and typing the endless serial numbers into google, finding out what kind of chip they are, trying to find a current price when most prices listed are circa 2005-2012, and then making a listing for them. I wish there was someplace I could take them where ppl who actually know what they are could sift through them, and ofc I'd sell them at a low cost. I live in the bay area, I suppose I could look for a flea market in silicon valley and hope for the best? Thanks again for your response, David.
Dear question, I have an EEPROM memory with a specific number that I could not find in the market. The memory size is 256 KB. Can it be replaced with another? It does not. have to be the same number, but of course the same size, or it must be the same number and the same size. The one is damaged is one time only read memory"TMS27PC256-20NL". The one i will used is UV EPROM"M87C257-20F1". With same size of course i will transfer data with programmer from TM to M8. Can do that because idont have TM eprom. I have M8 eprom.
I want to make my own 8085 learning board. Instead of using old technology UV erasable EPROM can't I just just latest EEPROMS from STMicroelectronics or some other vendors? I think I can save my cost of buying uv eraser and universal programmer device. What do you say?
yes, you can get pin compatible EEPROMs. you can see me using one here: th-cam.com/video/ncuKBdUZZhI/w-d-xo.html and here is a very nice Z80 board: th-cam.com/video/l9NdGPrB0RI/w-d-xo.html
@@IMSAIGuyHi sir, i have old eprom 2716, and i have to save to file and duplicate this ic with XGecu t48. But i dont know how to do. Do you have tutorial how to duplicate and save file for IC 27c16 ?
I am learning about programmable ROM, and it all looked science fiction that a circuit can be modified after it is etched, so i looked up on youtube if there is any demo of ROM getting reprogrammed, and here i am landed.
Safe to say this is mind-blowing and stuff and how much we have achieved as a humanity. Still unsure of nitty-gritty detail on how it gets reprogrammed, but i guess one cannot learn everything there is to learn!
great info, ordered 5 28 pin for some tinkering on an obd 1 vehicle and this helped me get a few things including a chip puller not a flat screwdriver! haha
chip puller, such high class. I've got some in a drawer somewhere....
Nice little eprom eraser! Be aware of the bent over copper tape though, it might connect your pins on the one side of your eprom because the glue used on this tape is electrically conductive! Keep up your great videos. 👍 btw First 😀
Great way to learn 👌
Thank You for the video. Could you name the company (with product name) of the uv eraser product and the programmer device?
I use the Tl866ii Plus programmer
Is there a way to extract what is on an EPROM, and then open it so the data can be modified? I have a 1990s computerized sewing machine, and I would love to be able to modify the menus and stitches, which I believe are all stored on the EPROM.
yes and no. This is reverse engineering. Some ROM will allow you to change then but others will crash. if you just want to change PFAFF to IMSAI as text, that would be easy to try. modifying the stiches would be a lot of investigation.
@@IMSAIGuy Thanks. What do you think about just changing the motor RPM limit? As far as I can tell, the EPROM is setting the limit.
@@PfaffPfantom same answer
Woow that's amazing video there💜
Sir i have a weird question..what's the brand name of that blue pen in 07:02😂😁
I used it in my childhood (elementary school) very much and i'm wondering if it's being manufactued till now..
Zebra Sarasa Clip 0.7
@@IMSAIGuy Thank you very much sir😁🙏🏻
Hi, im sorry to bother but i have a question. Would i be able to program a Fujitsu MB8841 chip I have!?
I'm not familiar with that chip. here are supported chips for my programmer: www.xgecu.com/MiniPro/TL866II_List.txt
Hi! I see you're knowledgable about these chips and come asking for advice. I've come into a rather large collection of various Microchips via a bulk liquidation purchase of electronics. I only have about 7 of these types, but I have Dozens of other types and some types hundreds of them.
To name just some of them(They come in long anti-static sticks of 25/40/50/etc. each) I have MCV's, ADC's, PLD's, MUX's, Counters, Darlington Arrays, Octocouplers, D latch's, RS232's, Quad Amps, OP AMP's, Shift Reg's, , LM2931M-5.0 5v LDO,Flip Flops, Dual OPAMP, Buffer XCVR's. Each of these sticks probably has 20-50 chips in them, all Brand New, and I have sooooooo many other types too. Brands like Texas Instruments, Analog Devices, SPARTAN, Motorola, ATMEL, Pericom, MAXIM Inegrated Products, etc. In addition to these chips, I also have hundreds of what I assume are the "housing units?" that these chips' pins fit into before being mounted on a PCB.
My question is this, I look online for these chip's selling prices, most go for $2-$5 each, but some I see sell for $10-$25 each, some buyers shelling out $500 for a 20 strip of the same chips I have. However, I've listed several of them for sale on Ebay at well below market rates, and have had 0 luck with selling any of them(I can reply with a link to one of my listings if you're OK with that). I'm unsure if I'm labeling them wrong, or if there's some secret Microchip selling forum that I should join?
Thanks for reading, and I look forward to reading your or other experienced individual's answers!
David
sounds like pretty old stuff. at the flea market I would ask $1 per tube. Once you add shipping eBay is not always a good deal.
the housing units are 'sockets' again $1 per tube is what I have paid
because shipping is such a problem you might consider selling in lots
@@IMSAIGuy Hi! Thanks for the prompt reply. Yea I suppose I should sell them in their full strips rather than singles.
I'm rather hesitant to sell some of the larger tubes of chips for a buck though? For example, I see stuff like Motorola MC68HC811E2FN--2C16J 8-bit 52-Pin Microcontrollers. I see someone paid $1.3K for 180 of them as recently as august of 2020, while others have bought them at $300 for 50. I only have 23 of these, but even listing them for $5 each I haven't had a single sale. Maybe I'd do better if I listed them well below other sellers at 23pc for $50?
Honestly the most daunting task is reading and typing the endless serial numbers into google, finding out what kind of chip they are, trying to find a current price when most prices listed are circa 2005-2012, and then making a listing for them. I wish there was someplace I could take them where ppl who actually know what they are could sift through them, and ofc I'd sell them at a low cost. I live in the bay area, I suppose I could look for a flea market in silicon valley and hope for the best?
Thanks again for your response,
David.
Dear question, I have an EEPROM memory with a specific number that I could not find in the market. The memory size is 256 KB. Can it be replaced with another? It does not. have to be the same number, but of course the same size, or it must be the same number and the same size. The one is damaged is one time only read memory"TMS27PC256-20NL". The one i will used is UV EPROM"M87C257-20F1". With same size of course i will transfer data with programmer from TM to M8.
Can do that because idont have TM eprom. I have M8 eprom.
I think it will be fine. make sure, same voltage, same pinout. if it broken, how can you transfer the contents
@@IMSAIGuy i have another same board it is sample to fix the broken one.
So cool, 27256?
27C256
@@IMSAIGuy excellent :-)
Would you please refer to the link where I can buy this EPROM Eraser device?
sorry, too many years ago
How do you identify what chip manufacturer and id number on the chip? Or does the programmer find it automatically? Thanks
You need to read the ink on the part and find the part number and manufacture.
I want to make my own 8085 learning board. Instead of using old technology UV erasable EPROM can't I just just latest EEPROMS from STMicroelectronics or some other vendors? I think I can save my cost of buying uv eraser and universal programmer device. What do you say?
yes, you can get pin compatible EEPROMs. you can see me using one here: th-cam.com/video/ncuKBdUZZhI/w-d-xo.html
and here is a very nice Z80 board: th-cam.com/video/l9NdGPrB0RI/w-d-xo.html
@@IMSAIGuy Thank You.
Suggest me an PROGRAMMER by which I can read data from an UVEPROM & Trasfer program to UVEPROM
I use a TL866II Plus Programmer
@@IMSAIGuyHi sir, i have old eprom 2716, and i have to save to file and duplicate this ic with XGecu t48. But i dont know how to do. Do you have tutorial how to duplicate and save file for IC 27c16 ?
could you help me ? i have UPD27C1001A eprom how can i programme or restore it ?
I use the Tl866ii Plus programmer. I'm not sure what you mean by restore it?
can i programme upd27c1001a by tl866ii ?
@@samwelemad8518 I think so, check their website, they have a full list of all parts supported
is that windows 95?
I think that just program's gui is retro....
maybe.. program made so past?
Hi sir,I'm from India I have some doubt on this and i would like to talk with you can you give me your email or something to contact you
best to ask questions here so others can help also
Ok thankyou is it possible copy the data from GAL Can you please post the vedio for copying GAL and EEPROM
@@meiyazhaganmeiyazhagan1251 there is no way to read a GAL.
Ok what type of programmer you are using to copy the eeprom
@@meiyazhaganmeiyazhagan1251 TL866II Plus