LIV2/amiga-par-to-spi-adapter
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amiga-par-to-spi-adapter/hardware/assembly-instructions.md
Niklas Ekström 27d6ad85fa Update README and assembly instructions
2021-07-20 19:21:29 +02:00

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Assembly instructions

The assembly of the adapter is quite simple. You need a parallel port connector and an Arduino Nano. Connect the parallel port to the Nano as follows:

Par. pin # Par. pin Nano pin Atmega328P
2 D0 A0 PC0
3 D1 A1 PC1
4 D2 A2 PC2
5 D3 A3 PC3
6 D4 A4 PC4
7 D5 A5 PC5
8 D6 D6 PD6
9 D7 D7 PD7
10 ACK D9 PB1
11 BUSY D8 PB0
12 POUT D4 PD4
13 SEL D2 PD2
18..25 GND GND GND

Connecting SD card module to Nano

To use the adapter with the example SD card driver (spisd.device), connect the SD card module to the Nano as follows:

SD card Nano pin Atmega328P
SS D10 PB2
MOSI D11 PB3
MISO D12 PB4
SCK D13 PB5
CD D3 PD3
VCC VCC
GND GND GND

CD = Card Detect. Not all modules has this pin available, but since the Micro SD card connectors typically has this pin it should be possible to solder a wire to the connector.

Note that the SD card module must have voltage level translation between the +5V used by the Amiga and the Nano, and the +3.3V used by the SD card.