🚀 go-pugleaf

In article <2009@nosc.NOSC.MIL>, fayette@halibut.nosc.mil (Daniel F. Fayette) writes:
> Two questions:
> 
> 1.  I have inherited a Z-415B Add-on Memory Board which is now installed
> in my Z-248.  The question is, can I do anything with this other than
> making it a large RAM drive?  I do not have a Z-405 (512K to 1.1M) card.
> I only have 512K of system memory.  Can I use the Z-415B to get 640K of
> system memory?  How about expanded memory that can be managed by EMM.SYS?
> 
> 2.  Can DOS do anything with the COM3 port on the Z-248?
> 
> Thanks.

Without a 405 card the 415 is not useable in a 248.  The way it is set up
There must be a 405 card in the machine to fill the memory up to that point.
It can't be used to fill out to 640k either.

Zenith made basically 3 memory cards for the 248, the 405, 415 and 445 cards.
All three boards will not do EMS memory. The 405 and 415 are more restricted
than the 445.  They can't be addressed as many ways.  The way the 445 was
set up you could use it either to fill out to 640k and then add additional
memory or you could use all of it as extended memory depending on how you 
set the jumpers.

Zenith has discontinued these boards and replaced them with some new lower
cost boards.  I don't remember the part numbers.

As for COM3 port.  If you are talking about the one that the government 
received in the 248's then there is very little software that will see
the card.  Most of that software was either written by or for the government.
On the other hand most any internal modem can be set COM3.  And most newer
communication software can see those ports.

			John Wolf
		   CSE0421@desire.wright.edu