REM Econet Workspace at &90-&9F
REM ---------------------------
REM &0090-6 unused
REM &0097 = old ACCCON state (Master)
REM &0098 = b7 = respond to Escape
REM &0099 = b7 = need to release Tube
REM &009A/B => Current NetTx control block
REM &009C/D => First page of private workspace - NFS and Econet info
REM &009E/F => Second page of private workspace - receive buffers
REM Doesn't use &0DF0,X as workspace pointer
REM
REM NMI Workspace at &A0-&A7
REM ------------------------
REM &00A0/1 => block to be transmitted
REM &A2-&A5 = length of something
REM check &00A2/3 = length of open port buffer
REM check &00A4/5 => open port buffer
REM check &00A6 = offset into open receive buffers
REM check &00A7
REM
REM Command workspace at &A8-&AF (saved and restored)
REM -------------------------------------------------
REM &00A8 = Y during service call
REM &00A9 = ROM service number (7=osbyte, 8=osword)
REM
REM Filing System Workspace at &00B0
REM --------------------------------
REM &BB = X store
REM &BC = Y store
REM (&BB) => control block
REM &BD = A store
REM (&BE) => command string
REM
REM Filing System Workspace at &00C0
REM --------------------------------
REM check &00C0-&00CB NetTx control block for NetFS_Op
REM check &00CC
REM check &00CD
REM check &00CE
REM check &00CF
REM
REM NMI Workspace at &0D00
REM ----------------------
REM &0D00 NMI code
REM
REM &0D20-&0D26 Scout/Acknowledge packet
REM &0D20 Destination Station
REM &0D21 Destination Network
REM &0D22 Source Station (ie, this station)
REM &0D23 Source Network
REM &0D24 Control Byte
REM &0D25 Port
REM
REM &0D3D-&0D44 Received scout
REM &0D3D Station
REM &0D3E Network
REM &0D3F Control Byte
REM &0D40 Port
REM &0D41-4 Remote Address
REM &0D41-8 Broadcast data
REM
REM &0D49
REM &0D4A &40 if receiving a broadcast
REM &0D4B
REM &0D4C
REM &0D4D
REM &0D4E
REM &0D4F
REM
REM &0D50
REM &0D51 Saved System VIA setting
REM &0D52
REM &0D58-&0D5B Saved RemoteAddress during RemoteCall
REM &0D5C
REM &0D5D
REM &0D5E
REM &0D5F
REM
REM Econet Workspace at &0D60
REM -------------------------
REM &0D60
REM &0D61
REM &0D62 b7=Transmission in progress
REM &0D63 Protection mask
REM &0D64 b7=Rx at &00C0, b6=?, b2=Halted
REM &0D65 Saved protection mask
REM &0D66 b7=Econet using NMI code
REM &0D67 b7=Tube present
https://mdfs.net/Info/Comp/Acorn/Source/Filing.htm