Good day, all!
I recently came across several of these chips:
I googled the number (D27128A-2) and found the datasheet, which says it's a programmable chip. However, my question is would it be possible for a user (me) to program it, and if so, what software would be needed?
Thanks in advance!
Der Strom
I googled the number (D27128A-2) and found the datasheet, which says it's a programmable chip. However, my question is would it be possible for a user (me) to program it, and if so, what software would be needed?
Thanks in advance!
Der Strom
Hi,
Its a 128K bit EPROM, organised as 8 bit wide and 16K byte long
You could make a PC parallel port driven prommer, it requires exposure to UV light [eraser] , the window is hidden under the label.
Don't throw them out, though! You might be able to find someone to buy them who restores old systems (mainly old 8-bit era machines, especially arcade machines). While I have a ton of them already, if you want to get rid of them, PM me (or contact me thru my website), and maybe we could work a paypal exchange (depending on what you want for them).
Thanks, guys!
Thank you cr0sh for the offer, but I'm still trying to learn more about microcontrollers. I have not yet gotten any PICs, so I'm thinking I might like to learn more using these, since I have the chips and I have the parts to build the programmer (Thanks, Eric!)
Der Strom
Whilst that chip can be programmed it is not a microcontroller but just an EPROM. You will just be wasting your time making a programmer as the final chip will be of no use. Get some pics and use your time and effort learning how to use them.
Oh, thanks, Mike. I guess I misunderstood what the chip could do.
I'm still planning on getting some PICs anyway, so you probably just saved me a lot of time and money Thanks!
Der Strom
Whilst that chip can be programmed it is not a microcontroller but just an EPROM. You will just be wasting your time making a programmer as the final chip will be of no use. Get some pics and use your time and effort learning how to use them.
Mike what was them chips that could be programmed there something like EPROM. You hooked a slow clock to it and it would toggle it's pins by how you programmed it.
Thanks, guys!
Thank you cr0sh for the offer, but I'm still trying to learn more about microcontrollers. I have not yet gotten any PICs, so I'm thinking I might like to learn more using these, since I have the chips and I have the parts to build the programmer (Thanks, Eric!)
Der Strom
No, there were far better chips back then - they were so limited - only certain modes and operations were allowed. Other chips, such as the 6522, were far more versatile.