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Doc: Make the half-carry flag explanation more clear

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Riyyi
2022-08-24 15:27:08 +02:00
parent ab550f6d3e
commit 1f25f875e6
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doc/terminology.org
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@@ -19,10 +19,12 @@ GameBoy terminology.
*** Flags *** Flags
The Half Cary (H) flag differs between 8-bit or 16-bit operations. The 8-bit The half-carry flag ~H~ is set when an arithmetic operation on two numbers
variant indicates carry for the lower 4 bits of the result, or overflow from bit causes a carry from bit #3 to bit #4 for 8-bit operations or a carry from bit
4 to bit 5. The 16-bit variant indicates carry for the lower 4 bits of the #11 to bit #12 for 16-bit operations. For 16-bit operation this indicates the
*second* byte of the result, or overflow from bit 12 to bit 13. lower 4 bits of the *second* byte[[#references][(3)]].
We start counting from the right as bit *#0*!
*** Opcode *** Opcode
@@ -54,5 +56,6 @@ n = constant
** References ** References
- https://gbdev.io/pandocs/Memory_Map.html 1. https://gbdev.io/pandocs/Memory_Map.html
- https://gbdev.io/pandocs/Specifications.html 2. https://gbdev.io/pandocs/Specifications.html
3. [[https://robdor.com/2016/08/10/gameboy-emulator-half-carry-flag/]["A Visual Guide to the Gameboy's Half-Carry Flag"]]. robdor.com. Retrieved 24 Aug 2022.