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computers / comp.sys.apple2 / Re: 8 bytes

SubjectAuthor
* 8 bytesvince
`* Re: 8 bytesfadden
 `* Re: 8 bytesvince
  `- Re: 8 bytesfadden

1
8 bytes

<slrnu0lb3b.npl5.vince@pianoman.cluster.toy>

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Path: i2pn2.org!rocksolid2!i2pn.org!eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail
From: vin...@pianoman.cluster.toy
Newsgroups: comp.sys.apple2
Subject: 8 bytes
Date: Fri, 10 Mar 2023 04:04:59 -0000 (UTC)
Organization: A noiseless patient Spider
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Message-ID: <slrnu0lb3b.npl5.vince@pianoman.cluster.toy>
Injection-Date: Fri, 10 Mar 2023 04:04:59 -0000 (UTC)
Injection-Info: reader01.eternal-september.org; posting-host="291be19428a7d38071edc0b6582b4e01";
logging-data="1922859"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+0hayt65DNohuDZtLaxsdFZJdfBu32nxU="
User-Agent: slrn/1.0.3 (Linux)
Cancel-Lock: sha1:X9SBAf+i7E3IHaf4yYxt8+enilo=
 by: vin...@pianoman.cluster.toy - Fri, 10 Mar 2023 04:04 UTC

CALL -151
B8: 2C EA 20 F4 F3 20 D8 F3
B8G

Re: 8 bytes

<31920fa7-dc74-496e-b05c-e0061664621en@googlegroups.com>

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Newsgroups: comp.sys.apple2
Date: Fri, 10 Mar 2023 08:17:03 -0800 (PST)
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Injection-Info: google-groups.googlegroups.com; posting-host=24.130.68.111; posting-account=UAtoeQoAAADrX7T-MHdWWRC4Fzf0dsLP
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User-Agent: G2/1.0
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Message-ID: <31920fa7-dc74-496e-b05c-e0061664621en@googlegroups.com>
Subject: Re: 8 bytes
From: thefad...@gmail.com (fadden)
Injection-Date: Fri, 10 Mar 2023 16:17:03 +0000
Content-Type: text/plain; charset="UTF-8"
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 by: fadden - Fri, 10 Mar 2023 16:17 UTC

On Thursday, March 9, 2023 at 8:05:02 PM UTC-8, vi...@pianoman.cluster.toy wrote:
> CALL -151
> B8: 2C EA 20 F4 F3 20 D8 F3
> B8G

Cute. :-)

(Note: requires Applesoft.)

Could have skipped B8/B9 and started with BDG, though that probably makes the patterns less interesting. (You probably want BDG anyway, or it won't work on a IIgs.)

Re: 8 bytes

<slrnu0mtbu.rkm1.vince@pianoman.cluster.toy>

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From: vin...@pianoman.cluster.toy
Newsgroups: comp.sys.apple2
Subject: Re: 8 bytes
Date: Fri, 10 Mar 2023 18:22:54 -0000 (UTC)
Organization: A noiseless patient Spider
Lines: 21
Message-ID: <slrnu0mtbu.rkm1.vince@pianoman.cluster.toy>
References: <slrnu0lb3b.npl5.vince@pianoman.cluster.toy>
<31920fa7-dc74-496e-b05c-e0061664621en@googlegroups.com>
Injection-Date: Fri, 10 Mar 2023 18:22:54 -0000 (UTC)
Injection-Info: reader01.eternal-september.org; posting-host="291be19428a7d38071edc0b6582b4e01";
logging-data="2181265"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/n7iLbmCSB7PhQ7oUKXF58U6ZUyCRgoIU="
User-Agent: slrn/1.0.3 (Linux)
Cancel-Lock: sha1:K++qjtYpW7SUOKuWTXwr2Q1M0PM=
 by: vin...@pianoman.cluster.toy - Fri, 10 Mar 2023 18:22 UTC

On 2023-03-10, fadden <thefadden@gmail.com> wrote:
>
> (Note: requires Applesoft.)

yes, most of my sizecoding stuff requires Applesoft because there's a lot
of useful graphics routines in the ROMs. I don't always remember to
specify as I personally don't come across pre-II+ machines that often.

> Could have skipped B8/B9 and started with BDG, though that probably
> makes the patterns less interesting. (You probably want BDG anyway,
> or it won't work on a IIgs.)

I didn't think to check on a 65c816, I mostly just checked that the unused
opcode was harmless on a 6502 and 65c02. I guess that's the issue on a IIgs?

I start with B8G as this was a demoscene-style entry and they expect the
program to be runnable from a disk with BRUN. It was a bit extra effort
to find a way to have it fit in 8 bytes but also start execution at
the load address.

Vince

Re: 8 bytes

<0eff56ba-e8d6-46b5-952f-713b051d34f7n@googlegroups.com>

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Newsgroups: comp.sys.apple2
Date: Fri, 10 Mar 2023 18:57:05 -0800 (PST)
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<slrnu0mtbu.rkm1.vince@pianoman.cluster.toy>
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Message-ID: <0eff56ba-e8d6-46b5-952f-713b051d34f7n@googlegroups.com>
Subject: Re: 8 bytes
From: thefad...@gmail.com (fadden)
Injection-Date: Sat, 11 Mar 2023 02:57:06 +0000
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Received-Bytes: 1576
 by: fadden - Sat, 11 Mar 2023 02:57 UTC

On Friday, March 10, 2023 at 10:22:56 AM UTC-8, vi...@pianoman.cluster.toy wrote:
> I didn't think to check on a 65c816, I mostly just checked that the unused
> opcode was harmless on a 6502 and 65c02. I guess that's the issue on a IIgs?

$F4 is PEA, which is harmless enough for what you're doing, but it's a 3-byte instruction.

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