minerva and TKII EPROM burning problem

[cybervet]

I have a similar problem with Chris. I made an EPROM with Minerva and TKII but on the boot screen wjile the Minerva logo is there I don't see the Qjump logo.
I checked on the EPROM programer and I do have the 4AFB at C000, the wiring of the pcb is correct but when I Type PRINT PEEK_W(49152) instead of getting 19195 I am getting 3855 (Hex F0F).
Any ideas will be greatly appreciated .
I was wondering in the pcb that is presented below if the part we see is the top or the bottom.
Thanks in advance Tassos
http://theqlforum.com/download/file.php?id=157&mode=view

[Dave]

That is the bottom. The left rank of pins is for the socket above (EPROM) and the right rank of pins is for the socket below (the QL).

I have designed and will be making a batch of low cost Minerva/TK2 EPROMS of a new design, fully SMD. Ultra-low power. They should be ready in 4-6 months or so.

[cybervet]

Thanks Dave, no wonder why it is not working, I thought that was the top side so everything is reversed on the perf board.
I will make a new one and let everyone know how it will go.
Tassos

[Dave]

Are you using a 7400?

[Dave]

Also, I'm in the middle of making a bunch of these. They'll be quite cheap and I'll be selling them EPROMless too...

[cybervet]

Yes I am using a 7400 .
I am interesting in the EPROMless boards that you will make.
Tassos

[Dave]

EPROMless, it will be well under £10. With EPROM, a little more. Quanta members will get it at a discount - the idea is that in this day and age, Minerva should be considered a minimum system requirement.