The Z80182 register selection

[Richard Lewis]

It appears the Z80182 has 64 I/O addresses reserved for the peripheral control registers which can sit in x00-x3F (default) or are relocatable to x40-x7F or x80H-xBFH. I would assume that the later (starting at x80H) is the safest (for many reasons). Are there any existing ROM monitors that support this chip? The main core is a Z180. I suppose I could start with that and fork off SCM or RomWBW. 

[Marten Feldtmann]

I thought, that $C0 is the best address used ...

Marten

[Mark T]

There was already some discussion of this on the RC2014 group.

https://groups.google.com/forum/#!topic/rc2014-z80/mguWTAdRUsc

I think the conclusion was to use 0xC0 and relocate the devices that conflict with this.

Mark

[Steve Cousins]

Setting the Z180's internal registers to the range $C0 to $FF is what we are doing with my Z180 motherboard (SC126) and RomWBW. I will probably change SCM to do the same (it currently uses $40).

The RTC is relocated to $0C.

Steve

[Richard Lewis]

OK, think I had missed out on that discussion. Good to know thanks.

[Steve Cousins]

It was on that other group :)