> .... The hooks are in there to allow simh to
> support the IMP side of the 1822 host interface, and the next step would be
> to recover the OS for an ARPAnet era host and then extend the corresponding
> simulator to talk to the IMP simulation.
I wonder if ITS NCP code could be resurected. The KLH KS10 simulation
talks TCP thru an emulated ACC LHDH-11, but of course the modern (KS)
IMP support file doesn't do NCP (but the old KA/KL IMP support file
still exists);
;;; -*- Mode:MIDAS -*-
IMPVRS==.IFNM2 ; Version of IMP code
IFN NCPP,.FATAL IMP Code doesn't support NCP any more!
IFE KSIMP\SSIMP,.FATAL Wrong IMP driver file included!
OVHMTR IMP ;Charge all this stuff to the IMP
$INSRT LHDH
; IMP 1822 PROTOCOL INFORMATION (EXTENDED-LEADER VERSION)
; The IMP leader is 96 bits long, usually organized as 3 words of 32 bits.
; For further details, these documents are available from the Network
; Information Center:
; IMP-HOST protocol: BBN Report No. 1822
; NCP protocol: NIC 8246, Host-to-Host Protocol for the ARPANET
; IP, TCP: Internet Protocol Transition Workbook, and
; Internet Protocol Implementor's Guide
;
; Here is the leader format used by the IMP code. This format uses
; no IMP padding, assumes IP only, and expects all IMP<->HOST data
; transfers in 32-bit mode.
;
; Previous versions of this code which supported NCP used a much more
; complicated leader formatting scheme based on 36 bit transfers and
; IMP padding. That scheme is dead, see SYSTEM;IMPOLD WTHNCP for details.
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