I just remembered I got one of these for my TL866:JezC wrote: Thu Feb 12, 2026 5:18 pm Ok, so the IDE & RAM upgrade board has arrived so I will test that in the Rev 5 A500 soon (I hope).
@rubber_jonnie also kindly included a 27C400 EPROM so that I can program up a DIAGROM to see what the problem with the Rev 6 board is (green screen on boot).
The issue there is that I can't see an option for the specific 27C400 EPROM in the list for my TL866 programmer...
Some research required here I guess
Ah, thanks for the info. I may look up the details of the PCB and bodge together and equivalent... otherwise I can see it taking a week or so to get one ordered and delivered!rubber_jonnie wrote: Thu Feb 12, 2026 5:42 pmI just remembered I got one of these for my TL866:JezC wrote: Thu Feb 12, 2026 5:18 pm Ok, so the IDE & RAM upgrade board has arrived so I will test that in the Rev 5 A500 soon (I hope).
@rubber_jonnie also kindly included a 27C400 EPROM so that I can program up a DIAGROM to see what the problem with the Rev 6 board is (green screen on boot).
The issue there is that I can't see an option for the specific 27C400 EPROM in the list for my TL866 programmer...
Some research required here I guess
I didn't end up using it because I used the BooBip ROM emulator instead...
No worries and good luck!JezC wrote: Thu Feb 12, 2026 9:12 pmAh, thanks for the info. I may look up the details of the PCB and bodge together and equivalent... otherwise I can see it taking a week or so to get one ordered and delivered!rubber_jonnie wrote: Thu Feb 12, 2026 5:42 pm
I just remembered I got one of these for my TL866:
I didn't end up using it because I used the BooBip ROM emulator instead...
My backup plan is to check on the vintage programmers in the garage and see if they can program this chip...
Thanks - I might not get chance to dig into this until later in the weekend as my son is coming back from university today & staying for the weekend, so unlikely to get much time for retro stuff today.rubber_jonnie wrote: Thu Feb 12, 2026 9:16 pmNo worries and good luck!JezC wrote: Thu Feb 12, 2026 9:12 pm
Ah, thanks for the info. I may look up the details of the PCB and bodge together and equivalent... otherwise I can see it taking a week or so to get one ordered and delivered!
My backup plan is to check on the vintage programmers in the garage and see if they can program this chip...
No worries - I'd love one of those, shame they're no longer being manufactured!Sorry I should have thought of it earlier, but the BooBip caught me off guard with it's lovely USBness...
Have a nice weekend with your familyJezC wrote: Fri Feb 13, 2026 9:27 am Thanks - I might not get chance to dig into this until later in the weekend as my son is coming back from university today & staying for the weekend, so unlikely to get much time for retro stuff today.
Yeah it is, though I think I sen you a link for an alternative, though not particularly cheap if you only have limited use for them.JezC wrote: Fri Feb 13, 2026 9:27 am No worries - I'd love one of those, shame they're no longer being manufactured!
Thanks!rubber_jonnie wrote: Fri Feb 13, 2026 9:41 amHave a nice weekend with your familyJezC wrote: Fri Feb 13, 2026 9:27 am Thanks - I might not get chance to dig into this until later in the weekend as my son is coming back from university today & staying for the weekend, so unlikely to get much time for retro stuff today.
Yes, you did...but as you say a bit pricey for a 'single use' but I'll see how the adapter options work out as an alternative.rubber_jonnie wrote: Fri Feb 13, 2026 9:41 amYeah it is, though I think I sen you a link for an alternative, though not particularly cheap if you only have limited use for them.JezC wrote: Fri Feb 13, 2026 9:27 am No worries - I'd love one of those, shame they're no longer being manufactured!
