Add support for ez80-tios #25680

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myclevorname wants to merge 24 commits into ziglang:master from myclevorname:ez80

+485 −14

myclevorname commented Oct 23, 2025

I added 4 new integer types to Zir in order to support the eZ80's weird integers, (u)int24_t and (u)int48_t, making their usage UB (hopefully IB) outside of said target. A Hello World program using the ez80-tios target can be found at https://codeberg.org/clevor/hello-ce

Progress toward #23579

myclevorname force-pushed the ez80 branch from ecbec92 to 7a4b1ac Compare

October 23, 2025 20:51

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myclevorname commented Oct 23, 2025

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myclevorname force-pushed the ez80 branch 2 times, most recently from 97ff232 to ab40602 Compare

October 23, 2025 22:40

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myclevorname force-pushed the ez80 branch from 782c84d to f1678a7 Compare

October 23, 2025 23:39

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myclevorname force-pushed the ez80 branch from 38a9418 to baa4867 Compare

October 25, 2025 20:43

alexrp self-assigned this

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alexrp commented Oct 28, 2025

Needs a rebase due to #25691 being merged.

Also I think I'd like @mlugg and @jacobly0 to review some of the compiler changes here.

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myclevorname added 3 commits

October 28, 2025 06:11


          Add support for ez80-tios

7b4634a


          ez80_sysv -> ez80_cet

17e6d01


          Update tools/update-cpu-features.zig

1e1aaa3

myclevorname added 18 commits

October 28, 2025 06:11


          update lib/std/Target.zig

fe6e645


          update again

7fc9fd9


          set machine of ez80 to Z80

c42d7b3


          whoops

5e27506


          Use ptrAbiAlignment in more places

f983303

Should hopefully fix the alignment-related crash.


          remove

04138a3


          lib/zig.h for *24, *48 partially done

27d41be


          fix it

457373f


          add #

c409c46


          fix it harder

7655d94


          Finish the lib/zig.h intrinsics

ad3e85a

(yay)


          fix 1

e8afc99


          Fix compile error with std.Io.Writer on eZ80

e499441


          hopefully last zig.h fix

191dd77

ugh

72e1759


          Revert "Fix compile error with std.Io.Writer on eZ80"

e34a9bf

This reverts commit 446c343.

Dropped in favor of ziglang#25691
(0d1e26e)


          Edit ez80 ptrAbiAlignment comment

4784e6b


          remove ez80 atomic comment

cf3106d

myclevorname force-pushed the ez80 branch from 339e441 to cf3106d Compare

October 28, 2025 10:16

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          last?

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src/Type.zig

    
                  };

              }

              pub fn ptrAbiAlignment(target: *const Target) Alignment {

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alexrp Oct 29, 2025

Seems like this should move to target.zig since it has nothing to do with Type. But that doesn't necessarily have to happen in this PR.

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myclevorname added 2 commits

October 29, 2025 06:16


          last part 2

a4dc91e


          More portable trap I guess

The Z80 does not have "trap" instructions, but trap instructions
on the eZ80 jump to 0x000000, which is almost the same as `rst 00h`. In
addition, the Z80 and eZ80 both boot up at 0x(00)0000, so `rst 00h` is
appropriate.

alexrp requested a review from jacobly0

November 1, 2025 15:16

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