macmini/README.md

Mac(intosh) mini

Build Instruction

• Print the outer shell.
  • PLA, 0.2 mm, 180 ℃ (See also ./openscad/README.md)
  • macintosh-mini-part-a.stl (stl)
  • macintosh-mini-part-b.stl (stl)

• Setup your Orange Pi Zero Plus 2 (H3)
  • Install Armbian Bionic. https://www.armbian.com/orange-pi-zero-plus-2-h3/
  • Then SSH into the device.

$ sudo apt install -y git tightvncserver

# Install Node.js
$ git clone https://github.com/tj/n /tmp/n && cd /tmp/n && sudo make install
$ sudo n v10

# Install https://github.com/xpertsavenue/WiringOP-Zero
$ cd ~/
$ git clone https://github.com/xpertsavenue/WiringOP-Zero
## Please refer to https://github.com/xpertsavenue/WiringOP-Zero

# Enable SPI1 interface
$ sudo vi /boot/armbianEnv.txt # or use armbian-config
! overlays=spi-spidev analog-codec usbhost2 usbhost3
+ param_spidev_spi_bus=1

# Setup vncserver
$ mkdir ~/.vnc
$ vncpasswd ~/.vnc/passwd

# Install the dependencies & config files
$ git clone https://github.com/likeablob/macmini ~/macmini
$ cd ~/macmini
$ sudo ./install.sh

# Copy your assets
$ cp /path/to/vmac.rom ~/macmini/minivmac/vMac.ROM # Mini vMac ROM file
$ cp /path/to/vmac.dsk ~/macmini/minivmac/system.dsk # Mini vMac disk file
$ cp /path/to/.basilisk_ii_prefs ~/.basilisk_ii_prefs # Basilisk II config file
$ cp /path/to/macboot.wav ~/macmini/macboot.wav # Boot sound (optional)

# Reboot to apply the settings
$ sudo reboot now

# Select LineOut as the default sink
$ pacmd list-sinks | grep -e 'name:' -e 'index:'
  index: 0
	  name: <alsa_output.platform-1c22c00.codec.analog-mono> # LineOut
* index: 1
	  name: <alsa_output.platform-soc_sound.stereo-fallback> # HDMI
$ pactl set-default-sink 0 # or use `DISPLAY=:1 pavucontrol` and `alsamixer` to adjust volume

• [Tips]: Here is my working .basilisk_ii_prefs.

• Wire the display & USB boards to the OPi

OPi	Peripherals
PA15/SPI1_MOSI	LCD MOSI
PA16/SPI1_MISO	LCD MISO
PA14/SPI1_CLK	LCD CLK
PA13/SPI1_CS	LCD CS
PS12	LCD RESET
PA11	LCD DC
PA06	Push Switch
GND	Push Switch
USB-DP2	USB (Front) Data+
USB-DM2	USB (Front) Data-
5V	USB (Front/Rear) 5V
GND	USB (Front/Rear) GND
LINEOUTL	(Optional) Amplifier Input

• [Tips]: Pinout can be found below.
  • OPiZero
    • https://linux-sunxi.org/Xunlong_Orange_Pi_Zero_Plus
    • http://www.orangepi.org/orangepibbsen/forum.php?mod=viewthread&tid=2236
  • LCD (Note that there might be some variants.)
    • link1 link2
    • backup

Basic Concepts

1. At system boot, fbtft_device kernel module is loaded and it initializes the LCD as /dev/fb0.
2. nodm starts an X session and ~/.xinitrc get executed.
3. ~/.xinitrc launchs matchbox-window-manager and ~/macmini/switcher/*js.
4. ~/macmini/switcher/index.js reads the scripts ~/macmini/switcher/sh.d/*sh and spawns them one by one when there is a HTTP GET request at localhost:5501/.
5. ~/macmini/switcher/gpio-reader.js watchs the push SW at GPIO7(PA06) and send a request to localhost:5501/.

How does the low-res LCD(320x240) handle 512x384 resolution?

Internally tightvncserver and ssvncviewer are used to scale the display.

• e.g. 1_large_minimac.sh launches:
  • tightvncserver to create a virtual display (512x384) at DISPLAY=:1 (:5901)
  • minivmac in DISPLAY:1
  • ssvncviewer -scale 0.625 in DISPLAY:0 (By the -scale option, low-res LED get upscaled)

Gallery

BOM

Name	Quantity	Descriptions
OrangePi Zero Plus 2 (H3)	1	H5 ver. might work too.
2.4inch SPI Display (ili9341, 320x240, with flat cable)	1
Generic micro-USB Breakout Board	2
M2 x 6 mm Self Tapping Screw	16
D10mm Rounding Magnet	2
7x7 mm Push Switch	1
2W Small Speaker	1	(Optional)
ClassD Audio Amplifier Board	1	(Optional) PAM8403

Acknowledgments

• Mini vMac https://www.gryphel.com/c/minivmac/
• Basilisk II https://basilisk.cebix.net/
• Kudos to all the devs!