invalid opcode 0f44

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roytam1
Posts: 14
Joined: Mon 27 Oct, 2014 2:27 am

invalid opcode 0f44

Post by roytam1 »

PCem v12
CPU: Pentium MMX 233 and WinChip 240 are tried with same result.
roytam1
Posts: 14
Joined: Mon 27 Oct, 2014 2:27 am

Re: invalid opcode 0f44

Post by roytam1 »

Oops, thtat is a CMOV instruction. Is any of PCem emulated CPU support this?
szadycbr
Posts: 290
Joined: Mon 21 Nov, 2016 6:23 pm

Re: invalid opcode 0f44

Post by szadycbr »

quick google, and it appears that it first was introduced in Pentium Pro so 686 cpu's, PCem does emulate up to 586.
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omarsis81
Posts: 857
Joined: Thu 17 Dec, 2015 6:20 pm

Re: invalid opcode 0f44

Post by omarsis81 »

"PCem does emulate up to (a) 5x86" is a dangerous statement imo
the AMD 5x86 was introduced in November 1995, that would lead one's to think PCem doesn't have the Pentium 150 onward (those were launched in early 1996), let alone, the Pentium MMX in 1997
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SarahWalker
Site Admin
Posts: 1886
Joined: Thu 24 Apr, 2014 4:18 pm

Re: invalid opcode 0f44

Post by SarahWalker »

Cyrix 6x86MX is the only CPU PCem emulates that supports CMOV.
szadycbr
Posts: 290
Joined: Mon 21 Nov, 2016 6:23 pm

Re: invalid opcode 0f44

Post by szadycbr »

It was dangerous statement, but i wasnt sure about 6x86MX :(
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