The last several are good examples of how you can get from the 'net to a?
old school system being CP/M based on a PDP-11 that is sans native
networking.? The interface between the network and the 80 system
is console terminal (or simulation).
While checking on something else I found the KA9Q networking package
and telnet for Z80 exists...? ?However it will NOT run on a minimal Z80.
The compile package is about half a megabyte so the system would
require a hard disk minimally, BDS-C and assembler.? Required hardware
is Z80 with banking or MMU and the protocol is AX25 so a Z80 SIO or
better 8350 is a required item.? That means the other end has to talk
AX25 and have a matching physical level.? Why it existed...? Ham radio
VHF Packet networks were a thing from the late 70s though the 80s and?
allowed email and files to be transferred though digi-peters? digital
repeater that did store and forward and poor mans routing (origin call
and destination ham call letters) as well.? ?When internet access
became fairly easy and palatable cheap it was adopted over the
VHF Packet network.? There is a Digi-peter on the ARISS.
I have the full code package and the owner disavowed it back in the
early 90s so assists would be an on your on and hope the code base
is complete (it could be missing stuf...).? I archived all I could find back
when.
I also found CPC-IP [amstrand another z80 extended system] and that does
more but that also maybe abandoned-ware and worse hardware specific.
Keep in mind CP/M--Z80 is generally always flat 64K address space and
banking can get you room by parking least frequency used? stuff in a
mapped section of ram(or rom).?
The resident part of the CPC-IP is said to be over 14K and with cleaver
work that means the free space of (TPA) will be under 40K.? Most
Compilers and languages of useful functionality want 48K minimum.
On a vanilla box with a reasonable BIOS(about 8k if resident) that
is usually is 56K without banking or hiding software above the
BIOS which makes that space smaller.? ?With banking hardware?
its possible to get to 62K (maybe a bit more) TPA and hide some
of the resident extension above the bios in banked memory.
That kind of stuff is not in the CP/M alteration guide but the OS
really does not say can't.
I can throw both in the files area, they are easily a megabyte total and
a lot of zips (over 100 files).? ? Also I have not ascertained their copyright
status if any, no need to for my own interests but, public posting them
is well, on you.
Allison
