Rocksolid Light - comp.sys.apple2 - MSX Frogger

MSX Frogger - early musing

<alpine.DEB.2.21.2305020910120.27134@sd-119843.dedibox.fr>

https://news.novabbs.org/computers/article-flat.php?id=6045&group=comp.sys.apple2#6045

Path: rocksolid2!i2pn2.org!i2pn.org!eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: usotsuki@buric.co (Steve Nickolas)
Newsgroups: comp.sys.apple2
Subject: MSX Frogger - early musing
Date: Tue, 2 May 2023 09:13:51 -0400
Organization: A noiseless patient Spider
Lines: 13
Message-ID: <alpine.DEB.2.21.2305020910120.27134@sd-119843.dedibox.fr>
MIME-Version: 1.0
Content-Type: text/plain; format=flowed; charset=US-ASCII
Injection-Info: dont-email.me; posting-host="f4bf002d7f54124cbd5e995bf9ef546e";
logging-data="821827"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19LqJrFpoCMb8TRg9JhmlJixhS1QjTpZIE="
User-Agent: Alpine 2.21 (DEB 202 2017-01-01)
Cancel-Lock: sha1:bSU13BpBdJO99wDPXwbOFps6Gts=
X-X-Sender: mary@sd-119843.dedibox.fr

by: Steve Nickolas - Tue, 2 May 2023 13:13 UTC

So I just (with the help of a disassembly assisted by both IDA and MAME)
ported Frogger from the MSX to the Nabu (same CPU, VDP, PSG).

As there are a few cards for the Apple ][ that have the TMS9918 and
AY8910, I've thought about what may be easiest or hardest to port. The
main issue being, it's mostly Z80 stuff.

I've reworked Frogger so that it (theoretically; I haven't tested it on
metal) should 100% work on the Nabu; if one can translate the Z80 code to
6502, using the Nabu port as notes on where the hardware-specific stuff
is, perhaps it can be adapted to the Apple ][ with a sprite card.

-uso.

Elegance and truth are inversely related. -- Becker's Razor

computers / comp.sys.apple2 / MSX Frogger - early musing

Subject	Author
MSX Frogger - early musing	Steve Nickolas