All gems can now be downloaded in a single ZIP file: allgems.zip.
They are called gem0000-gem00xx (and some other names too), not what they are called on the page (ie A BIOS Delay and similar). This means that it is not easy to find anything without open all files and check them. Next revision will use a script to automate this process and then all files will have correct names.

x86 gems 4x4 by 4x1 matrix multiply 63 bit CRC Absoulte Value of Add with 255 saturation Aligned Fill Bit Block Inversion Bit Transposition algorithm BSWAP with 16-bit registers CodeAlign - Align your code Convert hex to ASCII Converting DX:AX into a base 10 string Copy Zero Flag to Carry Flag Copying data using the FPU Disable the Cache(s) Dividing 64-bit unsigned integers Dividing signed integers by powers of 2 Doing a NOP Exchange two values Fast Float to Int Fast Nibble swap Fast strlen() Filling a register with the Carry Flag Find common divisor Find minimum of two unsigned values Get Parity of 32-bit word Halt - the loop Hadamard Transform in MMX IF using AND Inverse squareroot LEA a power command MOVS with SI=-X, DI=+X Negate multiple-word numbers Penalties on the 486 Performance monitoring Population count of a 32-bit register Pseudo Random number generator Quad-precision shift Quad Adders Reversing bit order Round signed integers SALC - Set AL on Carry Shifting + rounding upwards Shifting bit arrays Sinus Generator - 40 bytes Small bubble sort Smaller loops Snippets from Ramblings in Realtime Square root < 20 cycles Testing for zero The ADC-Gem ulong2ascii x86 Mnemonic Replacements Emulate Bit scan instructions Emulate BSF instruction Fast BSF replacement Remove shift by one latency Replace Bit scan instructions Replace MOVSX/MOVZX Usage of JCXZ/JCXNZ PC Platform Gems A BIOS delay Flat Real Mode Flat Real Mode with EMM Writing a string Writing a two-digit number PC VGA Gems DRAMs Speed Up/Booster Drawing pixels Palette Programming PC Tiny Programs 15-byte Dump Meg to STDOUT 20-byte Starfield 56-byte Sierpinski's Triangle Generator 61-byte Mandelbrot generator 65-byte Life Simulator 78-byte Fade screen 79-byte Copper bar x 3 80-byte Pi calculator 84-byte Sample player 122-byte Quality fire

Motorola Gems Absoulte Value of Clear / Fill memory fast Insert sort Jump tables Optimize for MC68k CPUs