feipoa wrote: I suspect that you enabled BTB while leaving LOOP and RSTK enabled. For branch prediction (BTB) to work, LOOP and RSTK need to be disabled.
Yeah I was doing that...
Windows 98 on a 486...ouch 😜
the 100GF is a Step 0 Rev 5 chip.
feipoa wrote: Can you define what you mean by "work fine"? I like to have all hardware in a proper case, install WinNT 4.0, W2K, all the updates, let some benchmarks go for a few hours, then let an mp3 play overnight before I feel confident with a setup. EDIT: A few passes of MemTest 86+ v4.00 is also useful.
I guess when I say it "works fine" I mean it does not crash when I put the system under load doing the things I like to do 😜
Doom1 and Doom2, Monkey Island, Lands of Lore, Darksun, Ultima
general dos usage.
playing mp3's and messing with sound cards
I will do some benches and tests and post the results when I think the system is stable.
the ECS UM8810 board has been nightmare and I have had all sorts of crazy stability issues Ive never seen before....but Im confident I can get it stable.
the target OS is win95 or dos 6.22
the quality control in some of these old companies is laughable.
a ctrl-alt-del consistantly shows a screen full of coloured ascii characters before rebooting. its only a quick glimpse but little things like that make me think this board has not been refined at all by the makers. Im not the only one with that complaint about the ascii i notice.
Im currently using:
IBM 5x86-3V3100GF
ECS UMM8810 PAIO mobo rev 2.1(pheonix bios 4.04)
128k Cache 15ns (cringe I know...)
128 MB Fast Page Ram (should i drop back to 64 or 32?)
S3 virge pci on board n1e3bd
YAMAHA YMF718-S ISA
Adaptec SCSI 2940U2W bios 2.00
SCSI Quantum Atlas 18gb 68pin (awful noisy.ruins gaming experience. Replacing soon)
Generic IDE DVD Drive (ide cd and scsi hd. Is that ok?)
Windows 98 SE
multiplier is 3x
fsb is 33x
( id rather not pull my only MG200 Matrox Millenium out of my K6-2 system so unless I can get another cheap..........)
(Ive got to get my hands on 512K cache as 64kx8 or 128kx8 like the board supports)
feipoa wrote:I don't understand how you are trying to run the Cyrix 5x86-120GP at 3.6 V. I've never seen a Cyrix 5x86-120GP run at 3.45 V and not 3.6 V. What measuring device are you using to ensure the chip is receiving 3.6 V?
All I meant about the 3.6 volts is that I STILL dont have the voltage module for the UM8810 board. I cant find one. So Im unable to test my Cyrix 5x86 120-GP chip. I can run the 120-GP chip at 3.45 volts and it boots but I have no idea about the long term stability.
I was messing with an oc of 120mhz on this 100-GF and 3.45 volts and i had issues so Im going back to its bare roots. Im back at 100mhz on 3.3v and Im going to start by getting that stable.
I am using ibmm9.exe cyrix utility
Feipoa: when I use your default settings of...
RSTK_EN 1
BTB_EN 0
LOOP_EN 1
LSSER 0
WT1 1
BWRT 1
LINBRST 1
FP_FAST 1
MEM BYP 1
DTE_EW 1
IORT 000
USE_WBAK 1
I dont even make it out of the program. When I hit F3 to save some funky text comes up and then I get a super hard lockup.
I have no idea if the motherboard supports LINBRST - Theres very little text available and experimentation on the ECS UM8810 rev 2.1 board.
Im currently using:
RSTK_EN 1
BTB_EN 0
LOOP_EN 1
LSSR 0
WT1 1
BWRT 1
LINBRST 0
FP FAST 1
MEM BYP 1
DTE_EW 0
IORT 000
USE_WBAK 1
so far so good. fast and stable. windows 98 has not had any BOD's.
I have tried running DOOM2 but I noticed the keyboard feels wierd. As if theres larger than usual keyboard latency and Im sliding around the floors......I can only feel it ever so slightly. Its difficult to explain but its not "zippy" and responsive like my VLB AM5x86 running at 3x50mhz.
my other system is :
AM5x86 133ADZ chip OC'ed to 150.
1MB 10ns Cache
64MB Fast Page ram
Generic Motherboard - Asaki/hmc chipsets
Generic IO card
ET4000W32i VLB 1MB
CT1600 Sound Blaster Pro 2
CT1740 Sound Blaster 16 (MT32/SC55 interface)
Maxtor 1.01 GB Hard disk
multiplier x3
fsb 50mhz
I know the cyrix 100 pci based system is faster than the amd 150 vlb system but Ill keep testing and trying to get a full stable system.
Where can I download the windows 98 update file your using feipoa?