I have bought myself a new eprom programmer, the Minipro TL866CS due to mine no longer working thanks to no parrallel port anymore and windows 10. Went for one I have seen people on here say they had success with.
Struggling to program with it though.
My original plan was to use the five TMM27128D-20 eproms on my faulty 1942 board to flash them to rev B and replace the 5 on my good 1942 board (which is rev A).
However, in doing so, I think I have potentially found the fault on the duff 1942.
I grabbed rom 03 and read it, and find it does not rom ident, and on inspection in pspad, i found that some bytes matched and were in consistent locations, but every other byte was similar but not identical. I tracked this down to a stuck high bit 5 on the data bus.
I cleaned the pins and re-read, and obtained the same readings. I then read rom 5, which DID rom ident and matched the mame version, so reading is fine.
So, I then proceeded to erase the 03 rom, and got it to pass the blank check, and read in as all FF's. Next step was to program it with the mame rom, but I cannot get it to go past the first byte, which is F3 (this has bit 5 high).
I am using the software that comes with the device, MiniPro v6.10, but on flashing, I get the following error : "ERROR! Address :0x000000 Buffer Data F3 Verify FB"
After I do this, I can read the chip and its all FF's apart from the first byte with is F3.
Can anyone who has used this device on this type of eprom advise me what settings they used as I have no idea about the likes of PULS delay.
Struggling to program with it though.
My original plan was to use the five TMM27128D-20 eproms on my faulty 1942 board to flash them to rev B and replace the 5 on my good 1942 board (which is rev A).
However, in doing so, I think I have potentially found the fault on the duff 1942.
I grabbed rom 03 and read it, and find it does not rom ident, and on inspection in pspad, i found that some bytes matched and were in consistent locations, but every other byte was similar but not identical. I tracked this down to a stuck high bit 5 on the data bus.
I cleaned the pins and re-read, and obtained the same readings. I then read rom 5, which DID rom ident and matched the mame version, so reading is fine.
So, I then proceeded to erase the 03 rom, and got it to pass the blank check, and read in as all FF's. Next step was to program it with the mame rom, but I cannot get it to go past the first byte, which is F3 (this has bit 5 high).
I am using the software that comes with the device, MiniPro v6.10, but on flashing, I get the following error : "ERROR! Address :0x000000 Buffer Data F3 Verify FB"
After I do this, I can read the chip and its all FF's apart from the first byte with is F3.
Can anyone who has used this device on this type of eprom advise me what settings they used as I have no idea about the likes of PULS delay.
