Flashing HN27C4096 PLCC with TL866 II
Posted: Sat Jun 11, 2022 10:48 am
I'm trying to program a new tos rom on my falcons, with lower access time. I grabbed some HN27C2096-10s from ebay. The TL866II software seems to support this.
I checked the PLCC44-DIP40 adaptor I got with the TL866II. It seems to match the pinouts from the data sheet as far as I can tell. Its the adaptor marked 78E/89C 51/52/58 SERCOND. I checked about 20 pins, but guess I should check all 44 to be sure!
The 'pin detect' fails. It seems to look for VSS to be connected (pin 12 and pin34). If I check the ic with a multimeter it shows they are not internally connected. Is that normal? Seems odd the burner software is checking this but the chip doesn't have them connected.
Anyway if I untick all these boxes I can hit read and read '0xff' everywhere. Which is either blank or .. just not working (presuming there are pull-ups in the burner)!
If I try to program it just says 'programming failed' with no other information whatsoever, which is helpful!
Anyway thought its probably a known thing, how to program these on TL866II, so thought I'd ask here if any has tried it and can help?
I checked the PLCC44-DIP40 adaptor I got with the TL866II. It seems to match the pinouts from the data sheet as far as I can tell. Its the adaptor marked 78E/89C 51/52/58 SERCOND. I checked about 20 pins, but guess I should check all 44 to be sure!
The 'pin detect' fails. It seems to look for VSS to be connected (pin 12 and pin34). If I check the ic with a multimeter it shows they are not internally connected. Is that normal? Seems odd the burner software is checking this but the chip doesn't have them connected.
Anyway if I untick all these boxes I can hit read and read '0xff' everywhere. Which is either blank or .. just not working (presuming there are pull-ups in the burner)!
If I try to program it just says 'programming failed' with no other information whatsoever, which is helpful!
Anyway thought its probably a known thing, how to program these on TL866II, so thought I'd ask here if any has tried it and can help?