Got a few ROMs programmed - finally
Posted: Sun Sep 10, 2017 3:45 am
The adapter bases I ordered from the USA finally arrived ..so figured I'd have a play with some 27C64s I had recovered and blanked with UV..this weekend.
Downloaded the bin images ..but wasn't sure my TL866 programmer was up to the job.
Well the 27C64 _is_ in the list ..but I'm sure is not natively supported ??
tried the kernal first which failed to program.
First on account the chip ID isn't recognised ..
luckilly there is a tick box option in the software to ignore the ID ..
..but still programming could not proceed beyond XX0F..
at least not with the default settings ..
Upping the pulse delay timing to 200us and the VPP (programming voltage) to 21v in the options..
..fixed this ..
All roms together tested on a recently repaired VIC20 board..which had faulty memory and a faulty 6522.
Sadly I have no case for this board so I will use it for Test and repair.
So now I could proceed to flash a CHAR and BASIC rom also.
Nice to have options.
rgds
VS
Downloaded the bin images ..but wasn't sure my TL866 programmer was up to the job.
Well the 27C64 _is_ in the list ..but I'm sure is not natively supported ??
tried the kernal first which failed to program.
First on account the chip ID isn't recognised ..
luckilly there is a tick box option in the software to ignore the ID ..
..but still programming could not proceed beyond XX0F..
at least not with the default settings ..
Upping the pulse delay timing to 200us and the VPP (programming voltage) to 21v in the options..
..fixed this ..
All roms together tested on a recently repaired VIC20 board..which had faulty memory and a faulty 6522.
Sadly I have no case for this board so I will use it for Test and repair.
So now I could proceed to flash a CHAR and BASIC rom also.
Nice to have options.
rgds
VS