dragon 32 fault

[dublevay]

it definitely is a ram fault, i removed the ram and fitted dual wipe sockets and eventually got the normal screen but turned out the sockets were garbage and i and suffering to remove them and fit turned pin ones.
i can feel the dragon wanting to breath fire once more getting close

Generally speaking, I find dual wipe sockets better for old chips, as turned pin can have a habit of grabbing and ripping old tarnished chip legs. But yes, some of the dual wipe are very fragile, particularly those from AliExpress etc sometimes. Trouble is, the price of even the 'cheap' holders has tripled in the last year or two.

[thecaver99]

the 6114s i have got are new and i am finding the turned pins even worse that the dual wipe ones, they are gripping the ic legs and and if i need to remove them some have come off and 1 what looks like insert has come out of the socket.

i have a solid green screen now, still measuring and checking, the patterns have no gone but so has the other text grrr, it has 64k now at least

[thecaver99]

Long time lurker here. If you look at the differences it looks like bit 3 is always low.
It can't be the ROM if it's getting this far. Probably not RAM either.

Maybe the VDG chip connection to the data bus? Try cleaning the MC6847 socket.

"DRAGON" => "DRAGGN". G=O
"BASIC" => "BA[AC". [=S and I=A
"1982" => "1182". 9=1

Code: Select all

        v
    76543210
G = 01101111
O = 01100111

[ = 01011011
S = 01110011

I = 01101001
A = 01100001

9 = 00111001
1 = 00110001

i will have a look at this tonight

[dublevay]

the 6114s i have got are new and i am finding the turned pins even worse that the dual wipe ones, they are gripping the ic legs and and if i need to remove them some have come off and 1 what looks like insert has come out of the socket.

i have a solid green screen now, still measuring and checking, the patterns have no gone but so has the other text grrr, it has 64k now at least

Many of the 'new' chips you'll get nowadays are actually pulled from old equipment, and cleaned up. This means that you will often get tinned legs, which are slightly thicker.

[thecaver99]

it lives again and i have done the 64k upgrade as well and it is also working