update wiki

Author: cuu

wiki/How-to-Create-an-Official-PicoCalc-SD-Card.md

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+# How to Create an Official PicoCalc SD Card  
+
+The purpose of this wiki is to document the partitioning and creation process of the official PicoCalc SD card.
+
+⚠ Warning: This process involves disk partitioning and formatting, which may result in data loss if performed incorrectly. Do not proceed unless you have sufficient experience with Linux system administration.
+
+We are not responsible for any data loss or damage caused by improper use of these instructions. Proceed at your own risk.
+
+
+## Script  
+
+```bash
+#!/bin/bash
+
+DEVICE="/dev/$1"
+
+if [ -z "$DEVICE" ]; then
+  echo "No disk"
+  exit 1
+fi
+
+if [ ! -b "$DEVICE" ]; then
+  echo "$DEVICE not existed"
+  exit 1
+fi
+
+
+echo "Warn: $DEVICE will be destroyed and all data on this disk will be lost,Do you want to continue?"
+read -p "Confirm？(y/n) " confirm
+if [ "$confirm" != "y" ]; then
+  echo "Canceled"
+  exit 1
+fi
+
+
+echo "Begin partition..."
+
+# use parted to create msdos partition table
+echo "Create msdos partition table..."
+parted "$DEVICE" mklabel msdos
+
+
+TOTAL_SIZE=$(lsblk -bno SIZE "$DEVICE")
+SIZE_MB=$(( TOTAL_SIZE / 1024 / 1024 ))
+
+
+PART1_SIZE=$(( SIZE_MB - 32 ))
+
+
+echo "Create first partition in size ${PART1_SIZE}MB, FAT32..."
+parted "$DEVICE" mkpart primary fat32 1MiB ${PART1_SIZE}MiB
+
+
+sleep 2
+
+echo "Format first partition FAT32..."
+mkfs.fat -F32 -v -I  "${DEVICE}1"
+
+
+echo "Create second partition in size 32MB..."
+parted "$DEVICE" mkpart primary ${PART1_SIZE}MiB 100%
+
+
+echo "All done："
+fdisk -l "$DEVICE"
+```
+
+## How to Use the Script
+
+- Insert a blank SD card into your computer.
+- Run the script:
+```bash
+sudo ./partition_usb_32mb.sh sdb
+```
+(Replace "sdb" with the correct device name for your SD card.) 
+
+***BE CARFUL ABOUT THIS***
+***BE CARFUL ABOUT THIS***
+***BE CARFUL ABOUT THIS***
+
+If you are not careful, all the original data on the disk will be destroyed.  
+
+This script prepares the SD card for PicoMite, uLisp, NES emulators, and other Pico firmware using the fatfs library.
+
+Additionally, FUZIX can use `/dev/sdb2` (32MB partition) as its root filesystem, as FUZIX supports a maximum partition size of 32MB.
+
+## Flashing the FUZIX 32MB Image
+- Download the FUZIX image:
+ [PicoCalc_Fuzix_v1.0.img](https://github.com/clockworkpi/PicoCalc/blob/master/Bin/PicoCalc%20SD/firmware/PicoCalc_Fuzix_v1.0.img)
+
+- Flash the image to the second partition:
+```bash
+sudo dd if=filesystem.img of=/dev/sdb2
+```
+
+## Example Partition Layout
+
+After running the script, your SD card should have the following partition structure:
+
+```
+Disk /dev/sdb: 59.48 GiB, 63864569856 bytes, 124735488 sectors
+Disk model: STORAGE DEVICE  
+Units: sectors of 1 * 512 = 512 bytes
+Sector size (logical/physical): 512 bytes / 512 bytes
+I/O size (minimum/optimal): 512 bytes / 512 bytes
+Disklabel type: dos
+Disk identifier: 0x66a93eb2
+
+Device     Boot     Start       End   Sectors  Size Id Type
+/dev/sdb1            2048 124669951 124667904 59.4G  c W95 FAT32 (LBA)
+/dev/sdb2       124669952 124735487     65536   32M 83 Linux
+```
+
+Now your SD card is ready for PicoCalc, FUZIX, and other supported firmware!
+