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Forums > Requests > game not found
2021-09-17 06:18
TheWarCriminal
Account closed

Registered: May 2011
Posts: 30
game not found

It is not listed here, gb64 or Google but why would this game not be in c64 when almost all the early 80s arcade games were?

I am looking for Mappy.
 
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2021-09-17 08:39
Britelite

Registered: Dec 2001
Posts: 50
Quote: it was ported to the 2600, Colecovision, NES & Spectrum. All a 6502 cpu. So it should have been an easy port.

Colecovision and Spectrum don't use a 6502 though :)
2021-09-17 10:09
TheWarCriminal
Account closed

Registered: May 2011
Posts: 30
My fault. Thought I read somewhere they did. It is Zilog Z80.

But still those systems had lower specs than the c64. Especially in the sound & graphics.
2021-09-17 11:54
Groepaz

Registered: Dec 2001
Posts: 10492
The sooner you start...
2021-09-17 11:55
hedning

Registered: Mar 2009
Posts: 4012
Quote: The sooner you start...

+1. Start coding, TWC. <3
2021-09-17 16:45
CreaMD

Registered: Dec 2001
Posts: 2944
Quote: My fault. Thought I read somewhere they did. It is Zilog Z80.

But still those systems had lower specs than the c64. Especially in the sound & graphics.


Spectrum Zilog processor frequency is at 3.5 MHz, thats 3.55 times faster than 6502 processor frequency of PAL C64. As far I'm concerned it's a superior spec. You can do magic with that, even with the limitations of hires graphic mode of ZX Spectrum.
2021-09-17 16:50
Groepaz

Registered: Dec 2001
Posts: 10492
its apple and oranges though, since a z80 needs about 3 times as much cycles to do the same thing as a 6502. z80 wins when there is relatively few bytes to move, and relatively many 16 bit calculations (which is why its often better with those bitmap based vector games) - but that has little to do with the faster clock.
2021-09-17 16:59
Mr. SID

Registered: Jan 2003
Posts: 405
Also a CPU where the fastest way to clear the carry flag is to and A with A never wins in my book... :)
2021-09-17 17:46
JackAsser

Registered: Jun 2002
Posts: 1934
Quote: Also a CPU where the fastest way to clear the carry flag is to and A with A never wins in my book... :)

You must mean ADD?!?!
2021-09-17 18:29
Krill

Registered: Apr 2002
Posts: 2506
Quoting JackAsser
You must mean ADD?!?!
OR A, AND A, XOR A all clear the carry flag as a side-effect, ADC/ADD may set or clear it depending on the operand values. =)
2021-09-17 19:10
Groepaz

Registered: Dec 2001
Posts: 10492
magic
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