ChibiAkumas ASM Programming Forum

akuyou wrote: Sun Sep 20, 2020 7:22 am so "LD (DE),(HL)" copies one byte from address HL to address DE

I probably should have read that better.

So, I thought I could test this with this little piece of code:

org &8000
LD DE,1
LD (&4000),DE ; load 1 into memory at &4000
LD HL,4000 ; make HL a pointer to &4000
INC HL ; HL now holds &4001
RET


After this, HL has changed to &4001, DE holds 1, as does the memory address &4000.

When I change ...

I think you've slightly misread the cheatsheet (unless there's a misprint version out there)

The first line should be:
LD (DE),(HL)


Yes, that must be it. I already understood that (HL) and (DE) are pointers to an address in memory, but I thought that for instance INC HL would differ from INC ...

Hi,

I'm new here, thank you for giving me access to this forum. I'm following your lessons here (and watching the videos) but I'm already stuck at lesson two. Here LDIR is used to loop over memory addresses to set them to 0 to clear the screen. In the cheat sheet LDIR is explained as


Load HL ...