Understanding the x86's Decimal Adjust after Addition (DAA) instruction

• optromloader

  8 47 0.0 Assembly

  IBM PC/Clone 8086+ floppy-loading of option roms.

I have used DAA recently, in my "load option ROM in RAM floppy tool"[0]. Specifically, I use it for printing numbers as hexadecimal[1], as unfortunately the ASCII standard is not arranged in a way as to facilitate this.

0. https://github.com/rvalles/optromloader/

1. https://github.com/rvalles/optromloader/blob/master/optromlo...

• zsnes

  6 111 5.8 Assembly

  A maintained fork of ZSNES, a Super Nintendo emulator. The original project needs patches to build and is not maintained anymore: https://sourceforge.net/projects/zsnes/

I suspect that the most popular software using DAA that folks here have used would be emulators of old systems that had BCD mode, such as the SNES. For example, ZSNES uses it: https://github.com/xyproto/zsnes/blob/main/cpu/s65816d.inc#L...

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