Posted By
Litwr
on 2015-01-06
00:01:30
|  Re: World of Commodore 2014 pictures, video, reports
Hi, MMS! Thank for you the link to dos65 - it is about my idea. More work and more programs will be transferred from z80 to 6502. However a man can do very much only theoretically...  BTW the biggest problem is the screen size. A lot of good cp/m programs use 80x24 screen. IMHO z80 is the ugliest CPU ever known. Yes it works, has several good instructions but its success shows that our world is often wrong.
SVS, z80 emulator will be very very slow. The better way is to write a binary translator from z80 to 6502 but this is very big task and I almost sure that 6502:z80 speed ratio will be below 1.5:1 - this is slow. IMHO only the manual binary translation may give up to 3:1 ratio. However i8080/z80 programs are small in size so it is doable.
IMHO C128 z80 is nonsense because 6502 at 2 MHz and 80 columns screen is at least 2.5 times faster. C128 was relatively expensive but its cp/m is 2 times slower than at cheaper Amstrad CPC/PCW. z80 has no access to SID or VIC.
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