The Sinclair QL Forum

Really, REALLY p'd off. Ordered a Super Gold Card, received it and it doesn't work.

Was supposed to be in good condition. Now it'll have to go back

Mutter, mutter mutter

Damnit, where do people always find them to buy? I waaaant one How much was it?

All in all over $400.

The seller has refunded and I get to keep the dead unit.

Now for some searching for circuit diagrams and such.

Whopper

mk79,

You do know that Dave is producing a device with similar capabilities to the SGC. Look in the General QL Chat. Proposed cost around £70.

It's *just* a memory expansion that contains a CPU to get the two extra address lines. It runs that CPU at stock speed of 7.5MHz and 8-bits data bus, so it in no way compares to an SGC.

It's just a big, cheap memory expansion that does some clever things.

Just saying...

Dave,

It's still better than a dead SGC.

Whopper,

If you do find a circuit diagram for the SGC, I would be interested to have a look - I am keen to know how the 2 74hct244 chips are connected...

Hi,

If I thought I could get $400 ???? Whsts thst in real money... I would fix the SGCs I have.

I doubt there is a circuit diagram. But the SGC is only 4 layer board so should be straight forward draw a schamatic. But it still maybe copyright.

Derek,

That included postage and import duties. They took a huge chunk of cash.

Whopper

Pr0f wrote:Whopper,

If you do find a circuit diagram for the SGC, I would be interested to have a look - I am keen to know how the 2 74hct244 chips are connected...

Two HCT244 and one HCT367 is for buffering A0 - A19, DSL and R/WL lines from SGC to QL.