51 lines
1.8 KiB
Markdown
51 lines
1.8 KiB
Markdown
# Apple One<br>iCE40HX8K Breakout Board target
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Maintainer: Alan Garfield https://github.com/alangarf
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### Build environment
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The project was started with IceCube2, and the project files are in the subdirectory 'icecube2'. These haven't been updated in a while, but should prove a worthy starting point. I'll endeavour to keep them updated when I can.
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The project with the switch of the 6502 CPU from the gate simulated core to a logical simulated core allowed the FOSS yosys and arachne_pr to build the project. Now all you need is icestorm and the Makefile.
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To build:
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```
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$ cd yosys
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$ make
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```
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### Features
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* UART support using the second serial channel on the breakout board. (CTS support OS willing).
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* VGA support (will require a cable to be made).
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* PS/2 support (will require a cable to be made).
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* LED support using onboard LEDs on breakout, additional LEDs added to mine via a [YL-4 board from ebay](https://www.ebay.com.au/itm/4-4-Matrix-Array-Keyboard-16-Key-Switch-Keypad-8-LED-4-Button-Professional-Blue/183044563197).
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### VGA Cable
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```
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270 ohm
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vga_red pin - B1 -----/\/\/\----- VGA PIN 1
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vga_grn pin - B2 -----/\/\/\----- VGA PIN 2
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vga_blu pin - C1 -----/\/\/\----- VGA PIN 3
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vga_h_sync - C2 ---------------- VGA PIN 13
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vga_v_sync - D1 ---------------- VGA PIN 14
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GND -------o-------- VGA PIN 5
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|-------- VGA PIN 6
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|-------- VGA PIN 7
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|-------- VGA PIN 8
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\-------- VGA PIN 10
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```
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### PS/2 Cable
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```
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270 ohm
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ps2_clk - N3 -----/\/\/\----- PS/2 PIN 5
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ps2_din - N2 -----/\/\/\----- PS/2 PIN 1
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GND ------o--------- PS/2 PIN 3
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ext. psu GND ------/
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ext. psu 5V ---------------- PS/2 PIN 4
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