Archlinux32, i486 ISO for low-memory systems

Set 'iommu=off' to regain some memory.

Create und mount a swap partition and mount a /tmp to 
/mnt/tmp as bind mountpoint as very first action before
trying to install something with pacstrap/pacman..

With less than 196MB RAM pacman/gpg fail to verify
signatures, create a local /mnt/pacman.conf where you
set 'SigLevel=Never' and specify '-C /mnt/pacstrap.conf'.

With less than 96MB RAM mkinitio on tmpfs fails with
out of disk space, use 'TMPDIR=/mytmp mkinitcpio -P'
inside the chroot to create it.

Consider disabling tmpfs for /tmp on the installed
system too 'systemctl mask tmp.mount'.

Remember to compile your own static kernel or create
a stripped-down ramdisk if you have little memory.