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Forums > CSDb Discussions > Defending the 6502 arch honour
2017-04-18 06:23

Registered: Oct 2014
Posts: 174
Defending the 6502 arch honour

So at Revision, a gauntlet was thrown down from Team Mega Drive to Team ( if there actually was one ) SNES. The Mega Drive being a 68K so the Amigians patron console, while the SNES is 65816 representing the 6502.
The demo can be seen here https://www.youtube.com/watch?v=OeGdJk5zb6c

Given the SNES has 3.5Mhz 65816, 128K and a very nice PPU, lots of ROM space, hardware multiplier/divider + DMA channels and very accurate emulators ( a problem the MD people suffer ) It should be possible to melt the MD ;)
Sadly the SNES devs are not up to the task, anybody from the C64 demo teams willing to step up and plug the gap?
Being able to split the Data and Program banks should allow data to be packed more tightly and then you can move the DP(ZP) and where you want should push Speed code into Hyper code.

The never used Interlace Mode + HDMA should be good for some NUFLI type shenanigans.
... 3 posts hidden. Click here to view all posts....
2017-04-19 08:25

Registered: Dec 2001
Posts: 39
So, all the more reason for you to start working on your skills right away, instead of waiting for someone else to do the work for you.
2017-04-19 13:56

Registered: Dec 2001
Posts: 8548
indeed - complaining why noone codes $demo is going to work about just as great as complaining about why noone codes $c128stuff and $scputhings.
2017-04-20 06:06

Registered: Mar 2003
Posts: 1341
Well, I don't see anyone *complaining* but you, dear Groepaz. :)
2017-04-20 14:07

Registered: Dec 2001
Posts: 8548
if that qualifies as a complaint for you, your life must suck :)
2017-04-20 14:38
iAN CooG

Registered: May 2002
Posts: 1938
Fuck SNES, who cares!11
2017-04-20 16:18

Registered: Dec 2001
Posts: 1512
^ this
2017-04-21 03:06
White Flame

Registered: Sep 2002
Posts: 134
The 65816 can match or beat a 68000 at the same clock speed, depending on workload. However, Nintendo were cheap & idiotic by clocking it at basically 1.79MHz, instead of something like 10MHz. (There were 3 speeds, and especially the early systems ran at the slowest to match the slower ROMs. 3.58MHz is often only achieved when you're solely working with scratchpad memory.)

So there's really no defending the SNES CPU performance, regardless of its 65xx-ness, because Nintendo gimped it.
2017-04-21 07:01

Registered: Sep 2005
Posts: 244
The SNES is a fine console with many great games, but yeah, there are things, like those 3D parts in Overdrive 2, that wont happen without something like an SFX chip, because of what White Flame stated above.

That said, lol @ "honour" of a processor.
2017-04-21 07:57

Registered: Oct 2014
Posts: 174
also MD has one of the Z80 things in it! SNES has SPC-700 which is basically a 6502 as well.

Sure but you don't make a LOROM when making a demo, you go HIROM and get 3.5Mhz all the way. Also 128K is the Work-RAM not really a Scratch Pad ;) I mean its double what we have..

Go SA-1 then and have a 10Mhz 65816? but that wouldn't really be fair to the MD XD
2017-04-21 08:53

Registered: Apr 2007
Posts: 85
If you want to beat Overdrive 2 with a SNES demo, you should cheat using a module with Super FX chip. ;o)
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