Karateka on Commodore 128 w/ SuperCPU and RamLink

[localhbci]

The entire game runs off the CPU. However, the music routine generally runs once per frame due to the interrupt functionality. The SID is technically affected, but only in the sense that the code now runs fast enough to shorten the delay between individual register writes during each call to the music player to the point where it's most likely hitting SID regs on every 1MHz cycle.

[greenganja]

and to think... people are paying over $400 for super cpu's right now on ebay....

[HoneycombAgent]

Don't you think that's a bit TOO FAST?!

[jjovereats]

retrodundant

[00Skyfox]

Too bad the motions of the game weren't based on the time clock rather than CPU clock cycles. If it was then it would have nice smooth motion at a normal pace rather than running like a VCR on fast forward. I have to wonder if SubLOGIC's Flight Simulator II also speeds up ridiculously fast on the SuperCPU or if it achieves full motion video speed with a realistic sense of time.

[ElectronicsPubVideos]

Why I think this is the as prince of percia?

[rogerjowett]

wouldn't freescape and vector 3d be better suited it would just increase the frame rate rather than make sprites impossibly fast?

mercenary elite starglider gyron sentinel revs?

cholo tau ceti

[makipri]

So that's the nightmare difficulty level!

[seph200x]

Hahah! Looks like a girly slap fight.

[sergito1983]

te cagaron a piñas flaco

[dosgamer74]

D*mn that *IS* fast! Karateka-3D anyone? :-D

Only way you'll stand even a small chance at that rate, is to use AUTOFIRE on the joystick (maybe even fiddle with the autofire circuit to up the hit rate?)

[SlightlyDeath]

Did I get it right now? This machine owns 16 MB(!) of RAM??? The game would really be too fast for me

[Pommes1983]

16 MB of RAM and 20MHz!!!

[rogerjowett]

@Pommes1983 20mhz like 6502 20mhz not z80 20mhz which is at least one quarter of teh equivalent 6502 speed?

[Pommes1983]

@rogerjowett no, a 16 bit 6502 (68156) much faster than 6502 (which is 8 bit)

So it is a lot faster than a Z80 on 20MHz.

[xadam2dudex]

@Pommes1983 it isn't a 65156 ir is a WDC W65C816

[Pommes1983]

@xadam2dudex That is correct. Sorry

[xadam2dudex]

@Pommes1983 it was a great chip too bad they never developed it further ..6502 chips were faster than Intel chips they could execute instructions faster with less clock cycles than Intel x86 chips..faster speed and made into a 32 or 64 bit chip etc woulda been awesome

[Pommes1983]

@xadam2dudex That is why PPC came out.. And nowadays the modern processors are faster..

[sw1tched]

god whoever is playing this sucks!!!

[redrumloa]

Hey, *YOU* try playing at 20x normal speed! ;-)

[AFTrash]

L-O-L

I always wanted to see Karateka with a bit more fluid sprites for the C-64, but damn!

[shreddingjoris]

Bitchslaps :-)

[mirabilis]

how come the music isn't affected? :)

[redrumloa]

Something in the way it was coded, I suppose. You would have to ask the original programmers!

[localhbci]

@redrumloa Probably because the music runs off the vertical interrupt, while the main game logic just runs continuously except for when the music interrupts it.

[nicolunacba]

@localhbci and the music runs in another chip (SID) that is not overclocked with SuperCPU

[FedorovAvtomat]

@mirabilis

This is because the CPU is affected by the extra speed. The CPU controls how fast the guy moves and how fast the sprites sequence. The SID is unaffected by the extra clock speed because it isn't relying on CPU calls to make the sound. So the SID is running at normal speed as is the VIC, but the CPU is running turbo if that makes any sense.

[mirabilis]

@FedorovAvtomat yes, the SID registers are normally updated during vertical blanking, right? That's 50 times a second.

[ShaneTheRaccoonDog]

@mirabilis It's likely because the music is timing based whereas the game is cycle based. In other words, Kareteka was programed to work with the C64's 1MHz CPU as apposed to the 20MHz of the SuperCPU.

[ericaesop]

bastard i want the super cpu and ramlink, how rare are they?

[harleykman]

Watching this video demonstrates why I wouldn't want a Super CPU (65000 instead of 6502). I want to be able to play games at a normal speed.

Also I had the double speed version of the 6502 (on a 128), and it really wasn't much use.

[redrumloa]

Actually most old games don't work in turbo mode, this is the rare one that does but is unplayable. Luckily the SuperCPU has a switch to enable/disable turbo mode on the fly.

[Realmasterorder]

Could be worth the value of today's game or more to collectors :)

[AFNYOAQIS]

i have the original floppy disk (5.25) for the C64 in mint condition. does anybody know how much its worth?

[racindeere65]

not much, $20-$30 at the most. the aren't a very rare item so they aren't worth much. most common price on ebay is $10

[kolobas2]

great game on the c64 but ran too slow and was way too hard. At least the first problem is solved here.

[xxbox619]

the game I like was Fist Karate III for Commodore 64

[gapenisbruzas]

ROFL! This is great!  You finally beat the first guy - now only like 50 more!