Not work with Sizif-512 and Harlequin Timex 2048

[Freiwind]

With Harlequin 128 revision 4B it works fine.
Tried connecting to Sizif-512 and Harlequin Timex 2048.
The system does not start. The display shows colored squares (Sizif) or vertical stripes (Timex).
It seems that it incorrectly identifies the models and, accordingly, incorrectly disables the ROM in them.

[anarsoul]

Thanks for testing! I do have a Sizif, so eventually I will take a look what is going on here.

I doubt it's the ROMs, since Sizif has 9v on the connector, so it will be detected as "not plus 3".

As for Timex, I don't have one, so I am afraid I won't be able to help with it

[Freiwind]

The issue with Sizif is resolved. Indeed, there were no 9 volts on the B4 bus contact.
Connected 5 volts to this contact. This is enough for EPM240 after the divider.