HP Prime/Firmware files

Overview

On the leaked versions of the updates files, the 'firmware.zip' archive contained :

• the Operating System (v0.26, v0.30)
• the Boot Code (v11+)
• an USB tool to install the above versions (having an interface letting you read/write images from/to any memory address - which is clearly not the final interface)

The several files for the calculator side are : APPSDISK.DAT, armfir.elf, BESTAARM.ROM, BXCBOOT0.BIN, MASTER.DAT.

Analysis

APPSDISK.DAT

A 32MB disk image, contains a FAT16 partition at offset 8K.

armfir.elf

ELF 32-bit LSB executable, ARM, EABI5 version 1 (SYSV), statically linked, stripped. There's a copy in APPSDISK.DAT/programs/misc/.

BESTAARM.ROM

Seems to be part of the bootloader.

BXCBOOT0.BIN

Seems to be part of the bootloader.