On 30.05.2017 21:05, Rob Landley wrote: > On 05/29/2017 05:14 AM, Richard W.M. Jones wrote: >> I see in the disassembly use of cmovne (new in Pentium Pro) and >> bswap (new in 486). >> [http://cse.unl.edu/~goddard/Courses/CSCE351/IntelArchitecture/InstructionSetSummary.pdf] >> >> The cmovne instruction is generated by the compiler (GCC in my case), >> >> The following patch removes the cmovne instruction, so it should work >> on 486 (although I didn't test it). It's not possible to remove bswap >> without surgery on the inline assembler. > > Is there any way to make it just _not_ load the option rom for -cpu 486? > It ran fine before that thing went in...
Looking at that commit b2a575a1c652 that you've mentioned, it seems like you could work-around the problem by disabling DMA for the fw_cfg device. Try something like adding the parameter -global fw_cfg.dma_enabled=false to your command line. If that does not help, try to use an older machine type, like "-M pc-i440fx-2.5". Thomas
