Trollbook: First demo [Homebrew 68040 palmtop computer]

Описание: This is a work-in-progress palmtop (ish) sized clamshell laptop that we've been
working on for a while.

In its current state, it boots up into a BIOS menu capable of doing
a few simple things like browsing a FAT formatted SD-card, flashing its bootrom
from SD-card and excuting programs from SD-card.

The entire setup uses about 4.3 Watts while running, including
display and backlight.

The hardware specs as of now can be summed up as following:

Motorola 68040FE33V CPU, running at 33 MHz
Altera Flex10KA FPGA for glue logic and peripherals (video, uart, spi etc.)
512 kB of SRAM (used for frame buffer and stage 2 BIOS code)
64 MB of SDRAM
800x480 resolution 7" TFT display, driven at 256 colors (from a 16-bpp palette)
Stereo audio DAC, samplerate of 44.1 kHz.
SD card interface over SPI
On-board SPI Flash ROM (512 kB) for bootstrapping code

The (blue) mainboard is a 10x10 cm 4-layer board, designed by us and manufactured by a Chinese PCB fab

The power supply board is temporary, a new keyboard/power supply and a case will be designed to better suit a laptop/palmtop form factor.

More pictures and information about its development: http://h4xxel.org/electronics/trollbook/
Github repository with PCB design and code: https://github.com/h4xxel/trollbook

-- h4xxel and slaeshjag