#27c801 eprom programmer serial#
#27c801 eprom programmer software#

I used a GWBASIC program to get the hex files into the PC, but that was ten years and two PCs ago. New snag, and I'm hoping someone here knows a solution. The larger memory would normally be for the '816, but a 6502 could address it too with artificial banking.

#27c801 eprom programmer serial#

The info comes from a tiny 4Mx8 serial flash in SO-8, one I've already used on a 65SIB module.

The RAM pre-loader sets everything up in a RAM-only system before releasing the RST line, so you don't have any slow ROM slowing you down, and your programs can also change the interrupt vectors. I also want to make a PIC-based RAM pre-loader, but the people who are interested in that won't necessarily be the ones who want the big math tables. One is the 29F080, but it's not available in a DIP so next I need to check prices and availability on adapters. I'm exploring some other avenues to make this available, but I'm not sure which way I'll go yet. I also just read that some inexpensive programmers didn't do these big EPROMs right, and even damaged them sometimes. I'd really like it to work but I suspect you may be right about the kludge. Maybe we can try the same stuff together on the phone. INI and an Intel Hex file) and you can see if you get the same errors I do.

When you get that far maybe I could email you a file or two or three (at least my. I'm pretty sure Wally Daniels is another, but he doesn't check in very often. After I wrote the above, I was thinking you were one of the ones who had a Needham's. I want to put the files on my website anyway, but I wanted to have this cross-check first to be extra sure everything is correct with the Intel Hex files first. (The Bytek programmer I bought recently on eBay, mentioned at viewtopic.php?t=2066, only goes up to 32Kx8.) I could also supply the data in something like a serial flash memory for the user to load into large (and faster) RAM, but I know that would be more intimidating for some users. My next thing to try is to just make my own programmer, controlled by my home-made workbench computer. Needham's is out of business, so I can't ask them. Has anyone here tried going beyond 64Kx8 on any of Needham's programmers that use their EMP software? Even if this is a known problem with no solution, at least knowing that will keep me from wasting more time trying to do something that will never work.

#27c801 eprom programmer software#

The next problem is that it says the Intel Hex file has a checksum error in it so using a binary search method as I added and removed lines to keep trying, I narrowed it down to the line that gives it the problem but when I do the checksum by hand, it's fine, just like every other line I've tried, including the one before it which the EMP software accepted. INI file but the file doesn't actually load, so then I have to click on 'Load file from disc' again and it loads but still the editor still won't show more than 64K. I can now get it to go to FFFFF only when I try to load file 1 declared in the. The first one was that I couldn't get the S buffer to go beyond FFFF even when I had the K buffer, L device, and T file out to FFFFF (five F's, for 1MB, instead of 64K) and a 1Mx8 device selected. I'm trying to put my large look-up tables for 16-bit math (log & trig functions, multiplication, inversion, square root, etc.) into 27C801 1Mx8 EPROMs and am having problems with the Needham's EMP software.

I know a few of you have Needham's Electronics programmers, so maybe there's a slight chance someone has gone before me on this and has an answer.