Someone with an RML380Z....

[Tony Duell]

> 
> 
> If you have the original 40 column board, can you take a look inside and
> see if the 5th IC in from the right on the top row of chips (first one
> in after the DRAM) is a 74LS158?
> 
> All the schematics show this as being a 74LS157 but it's got an LS158 on
> my board (which IIRC inverts the outputs).

My 380Z is hell to get to at the moment (there's a Philips 5200 word 
processor and then some bits of HP 98780A monitor chassis on top of 
it...). But I've looked at the schematics and the only muxes I can see 
are for the DRAM address. Can you confirm that this chip is one of those.

If it is, then I think it doesn't matter if the output is inverted or not. 
The address lines to the RAM will be inverted for both reading and
writing, so there'll be no problem.


-tony