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About SheepShaver, a PPC Mac emulator for Windows, MacOSX, and Linux that can run System 7.5.3 through MacOS 9.0.4.
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trying sheep on a ram drive

Sat Nov 26, 2005 5:06 am

i tryed to boot sheepshaver on a 700mb ramdrive the two hdd image that i use to boot macOs9 are totaling ~500mb they boot perfect from the hdd but from the ram drive i get the following in the stderr.txt file

SIGSEGV
pc 00455319
ea 42DF1200
r0 00000000 r1 2bff7afc r2 00000000 r3 2c000400
r4 00002278 r5 00006604 r6 00004e75 r7 ffffffe8
r8 00000000 r9 00000028 r10 0000006c r11 280074b2
r12 ffffffff r13 00000000 r14 200031c4 r15 27ffec00
r16 200e0508 r17 000013ff r18 200df888 r19 40814c1e
r20 2bff7b0e r21 2c000190 r22 2c000400 r23 00000000
r24 00001401 r25 00000020 r26 00000000 r27 ffff876e
r28 00000000 r29 40df1200 r30 40c60000 r31 68fff000
f0 0.00000 f1 0.00000 f2 0.00000 f3 0.00000
f4 0.00000 f5 0.00000 f6 0.00000 f7 0.00000
f8 0.00000 f9 0.00000 f10 0.00000 f11 0.00000
f12 0.00000 f13 0.00000 f14 0.00000 f15 0.00000
f16 0.00000 f17 0.00000 f18 0.00000 f19 0.00000
f20 0.00000 f21 0.00000 f22 0.00000 f23 0.00000
f24 0.00000 f25 0.00000 f26 0.00000 f27 0.00000
f28 0.00000 f29 0.00000 f30 0.00000 f31 0.00000
lr 40df1200 ctr 00000000 cr 40501c22 xer 00000000
pc 40df1200 fpscr 00000000

to be precise it does boot i get the grey screen with the little smilling mac then i get the bigger welcome screen for like half a sec and poof thats it


edit1:
ok tryed three form of ramdrive formating fat32 ,ntfs ,ntfs-c with out result
also tryed all ram size from 32mb to 128mb cannot go further as this would be more then the ramdisk permits me due to the 700mb size of my hdd but i could always make a 1gig ramdrive as i have 1.5 gig of ram

edit2:
my pref file

extfs c:
disk install.hfv
disk MacOS.HFV
rom MacOSROM.rom
windowmodes 7
screenmodes 63
seriala FILE
serialb FILE
bootdrive 0
bootdriver 0
ramsize 67108864
frameskip 0
gfxaccel true
nocdrom false
nonet true
nosound true
nogui true
noclipconversion false
ignoresegv false
jit true
jit68k false
keyboardtype 5
keycodes true
mousewheelmode 1
mousewheellines 3
idlewait true
enableextfs true


edit3:

ok sometime you do thing and you feel dumb about it the thing and here is what was my problem the install.hfv that i used at first was the install.hfv from my basiliskII installation so i finally got to boot 9.0.4 and did some benchmark with the install on the hdd and the one on the ramdisk and here is what i got
*********basilisk score old build*********
the ram disk gave me
cpu:30.223
gfx:12.745
disk:0
math:520.321

as for the hdd
cpu:29.650
gfx:13.382
disk:0
math:485.848

**********basilisk score new build from nov 2005******
cpu:29.410
gfx:21.723
disk:0
math:497.849
these were done with speedometer 4.02

edit4:
and you feel even dumber when you realize that writing all those number on a small piece of paper will make you do mistake here are the number for sheepshaver the other were for basiliskII

the bench
***********sheepshaver***********
ramdrive
cpu:7.629
gfx:4.595
disk:4.257
math:384.285

hdd
cpu:6.774
gfx:5.598
disk:3.885
math:956.128
these were done with speedometer 4.02

those were done with ppc code runing the bench with 68k code resulted in score 10% to 20% lower

also it is worth noting that the math score for basilisk was better in the ramdisk while it is the opposite in sheepshaver

Thu Dec 01, 2005 3:54 pm

ok did some test with the new 2.3pre build and the score are alot better

here is the result on the ramdrive
cpu:19.473
gfx:5.675
disk:4.794
math:1367.701

i did notice one thing the boot time was slower but not by alot ounce in i didnt notice any difference
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