The Sinclair QL Forum

Hi Dave,

I only asked about the restrictions on the SQB code, as I could disassemble it if you like. But reverse engineering could be thought of as software piracy and I do not want to be accused of that again...

I have programmed an eprom(27c256) with 1.19 and TKII, but it maps only the TKII. I think that the Sandy Super Q Board issue 1 pcb that i have, is designed to accept only 27(C)128 eproms, because pin 27 and 28 are shorted(to Vcc). And i don't think that if i cut the trace between 27 and 28 pin it will map both disk firmware and TKII.

Bend the pins out so they do not go to the socket then jumper wire them to where you wan't them to go.

Derek_Stewart wrote:Hi Dave,

I only asked about the restrictions on the SQB code, as I could disassemble it if you like. But reverse engineering could be thought of as software piracy and I do not want to be accused of that again...

You can disassemble it if you like. You own it and can do what you like with it. You can even publish or share the disassembly.

You can also reverse engineer it.

Bending out the pin will not give the right result. In minimum you have to connect pin 27 (with is A14) to the corresponding adressline of the QL connector. If than the decoder does an incomplete adress decoding you have a chance to get it to run !

Detlef

I bend the pin 27 out of the socket and solder the a13 pin(A14) form the QL connector to it. Now it maps the disk interface firmware but not the TKII. I think it needs more modification the pcb.