===== Z80 =====

  * [[http://stackoverflow.com/questions/387654/why-is-there-no-z80-like-ldir-functionality-in-c-c-rtl/388442#388442|Fast blanking screen]]
  * [[https://www.worldofspectrum.org/forums/discussion/41834/redirect/p1|Z80 CPU emulation test]]
  * [[http://clrhome.org/asm/|Online IDE and assembler for Z80]]
  * [[https://www.worldofspectrum.org/forums/index.php?p=discussion/41704/scf-ccf-flags-new-discovery|SCF CCF flags discovery]]
  * [[https://shred.zone/cilla/page/389/optimizations.html|Optimizations]]

==== Basic2Asm ====

  * ZIP v2.6 - anmeldt i YS85 - jan93. Side 22 - https://worldofspectrum.net/infoseekid.cgi?id=0013816

==== Multiface Stuff ====

  * Genie
  * Lifeguard

==== GDB support ====

Sådan kan man få en gdb med Z80 support:
<code>
git clone https://github.com/legumbre/gdb-z80.git 
cd gdb-z80
./configure --enable-werror=no --target=z80-unknown-coff
make MAKEINFO=true
sudo make MAKEINFO=true install
ls /usr/local/bin/z80-unknown-coff-{gdb,gdbtui}
ddd --debugger z80-unknown-coff-gdb &
</code>

==== RND ====

<code>
; Generate a Random Number
; ------------------------
; The pseudo random number is generated by: (Last_Random_Number * $43) + $01FD
; Exit: HL=Random number ($0000-$FFFF).
;       A=Random number ($00-$FF, the low byte of HL).

L4098:  LD   A,(L4084)                          ; Fetch the last random number.
        LD   C,A

        LD   L,A
        LD   H,$00

; Generate HL=Last_Random_Number * $40

        LD   B,$06

L40A1:  ADD  HL,HL
        DJNZ L40A1

; Generate HL=Last_Random_Number * $43

        ADD  HL,BC
        ADD  HL,BC
        ADD  HL,BC

; Generate HL=(Last_Random_Number * $43) + $01FD

        LD   BC,$01FD
        ADD  HL,BC

        LD   A,L
        LD   (L4084),A                          ; Store the new random number.
        RET  
</code>