You should consider using the serial configuration device, eg, EPCS first.
I think this is the cheapest and lowest pin counts.
When compressed, most uclinux image should fit in 16Mbit/32M/64M devices.
I have the vmlinux with Initramfs included, compressed to around 1Mbytes.
The Nios/II core can boot from EPCS, which can be partition to RBF image and vmlinux.
You can add a small uncompress boot loader, (4-8Kbytes) before the vmlinux.
Other space can be set to MTD flash fs.
If you need more storage space, you can use NIOS SPI to drive MMC/SD interface.
You can mount/umount it under the Initramfs root.
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originally posted by jdhar@Nov 21 2005, 10:36 PM
is it possible to use an mmc card like a cf card? as in have the kernel actually treat it as a storage device; i know it will be slower, but there are definitely advantages to using mmc.. it seems like the only way to implement rom is by on-board flash which is expensive, and cf, which is pin-intensive.
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