install/53375: NetBSD boot32 fails on 132MB A7000 claiming there is insufficient memory

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>Number:         53375
>Category:       install
>Synopsis:       NetBSD boot32 fails on 132MB A7000 claiming there is insufficient memory
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jun 16 22:15:00 +0000 2018
>Originator:     Alan
>Release:        7.1.2
>Organization:
N/A
>Environment:
Tricky to do.. since it won't boot

Its an Acorn A7000 with 132MB RAM, IDE disk IDE DVD ROM and the usual network module
Original firmware, usual !BOOT
>Description:
All the early install stages work until we get to clicking on the InstKern, at which point it bombs out claiming there isn't enough memory. If I bump the Wimpslot where the comment says it won't work if it's not sufficient that doesn't help, and the only change in behaviour if I keep increasing it is that instead of it complaining there isn't enough memory the desktop instead says there isn't enough room to ru the application
>How-To-Repeat:
Install 7.1.2 on an A7000 ?
>Fix:
Not known