DOS ain't dead

(My) fork of 8086 Assembler for DOS (Announce)

posted by rr  , Berlin, Germany, 26.12.2020, 17:33

> > So, don't ask for Pentium instructions support.
>
> So are we just allowed to report bugs?

I'm not in the position to allow or disallow anything to you or others. But I will kindly ignore requests for adding Pentium instructions.

Bug reports are welcome, of course.

> > Feel free to try it!
>
> I couldn't resist to try a potential wasm/jwasm/uasm/asmc competitor:

8086 Assembler is in no way meant as wasm/jwasm/uasm/asmc competitor. Maybe if you squeeze jwasm down to 10k.

> missing features (so far):
> - no ORG directive (so no device driver development possible?)

That's what the docs say.

> - SEGMENTs missing ( apparently ASM.COM is a "flat"-only assembler )

Would SEGMENTs make sense for a .COM-only assembler?

> - no support for listings

I added this to the docs now.

> - EQU exists, but no math possible ( "xxx EQU 1+1" is rejected )

The docs say: "Very limited support for expressions, i.e., only something like mov al,[bx+di] and mov ax,word ptr[codestore+2] works."

> - no END directive (important, since it allows "self-compiling" .BAT
> files)

What do you mean?

> bugs:
> - LDS opcode rejects any type of operands that I was able to imagine

That's interesting. Didn't try that.
Also applies to LES.

> - math accepted for direct operands, but ignored ("mov ax,1+2" is assembled
> to "mov ax,0000")

See EQU above.

You missed this bug: "dec r/m8, dec r/m16, and inc r/m8 instructions are encoded incorrectly. This also applies to the byte ptr or word ptr variants of div, idiv, imul, mul, neg, not, and push."

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Complete thread:

• (My) fork of 8086 Assembler for DOS - rr, 26.12.2020, 01:01 (Announce)
  • (My) fork of 8086 Assembler for DOS - DosWorld, 26.12.2020, 16:01
    • (My) fork of 8086 Assembler for DOS - rr, 26.12.2020, 16:31
    • (My) fork of 8086 Assembler for DOS - Japheth, 26.12.2020, 17:25
    • (My) fork of 8086 Assembler for DOS - RayeR, 26.12.2020, 22:48
      • (My) fork of 8086 Assembler for DOS - DosWorld, 27.12.2020, 00:03
        • (My) fork of 8086 Assembler for DOS - RayeR, 27.12.2020, 03:57
          • (My) fork of 8086 Assembler for DOS - DosWorld, 27.12.2020, 22:11
            • (My) fork of 8086 Assembler for DOS - RayeR, 28.12.2020, 01:09
              • (My) fork of 8086 Assembler for DOS - DosWorld, 28.12.2020, 14:00
                • (My) fork of 8086 Assembler for DOS - RayeR, 30.12.2020, 05:18
        • (My) fork of 8086 Assembler for DOS - rr, 27.12.2020, 08:49
        • (My) fork of 8086 Assembler for DOS - marcov, 29.12.2020, 19:14
  • (My) fork of 8086 Assembler for DOS - Japheth, 26.12.2020, 17:18
    • (My) fork of 8086 Assembler for DOS - rr, 26.12.2020, 17:33
      • (My) fork of 8086 Assembler for DOS - Japheth, 26.12.2020, 18:14
        • (My) fork of 8086 Assembler for DOS - rr, 26.12.2020, 23:26
    • (My) fork of 8086 Assembler for DOS - rr, 26.12.2020, 23:22
    • (My) fork of 8086 Assembler for DOS - rr, 27.12.2020, 13:22
  • ASM's symbol handling needs work - Japheth, 26.12.2020, 19:18
    • ASM's symbol handling needs work - rr, 26.12.2020, 19:23
    • ASM's symbol handling needs work - rr, 26.12.2020, 23:22
  • (My) fork of 8086 Assembler for DOS - rr, 27.12.2020, 01:05
    • (My) fork of 8086 Assembler for DOS - rr, 29.12.2020, 01:55
  • (My) fork of 8086 Assembler for DOS - rr, 02.03.2022, 21:54