VOGONS


Reply 41 of 52, by feipoa

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You'll get a nice boost if you set the registers to optimal. No BIOSes optimise the performance registers on the cx5x86.

Plan your life wisely, you'll be dead before you know it.

Reply 42 of 52, by arncht

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feipoa wrote:

You'll get a nice boost if you set the registers to optimal. No BIOSes optimise the performance registers on the cx5x86.

you could do similar trick at many cpus (k6, ppro, 6x, etc), but practically just a few people used it in the past. this is the reason, i test with default settings and timings (it is also slower). maybe later i will add it for the overclocked section.

My little retro computer world
Overdoze of the demoscene

Reply 43 of 52, by arncht

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dx2-66 added

CPU ranking (default settings):
40,77% Intel 486DX 33
57,84% Intel 486DX 50
71,78% Intel 486DX 66
99,40% Intel OverDrive DX4 100
99,54% Intel DX4 100
100,00% Intel DX4 100 WB
103,23% Cyrix 5x86 100
108,07% Cyrix 5x86 120
112,70% AMD 5x86 133

CPU ranking (fastest settings, overclock):
130,37% Cyrix 5x86 120
144,36% AMD 5x86 133 @ 160/40

CPU MHz scaling (performance / internal clock):
84,74% AMD 5x86 133
90,06% Cyrix 5x86 120
99,40% Intel OverDrive DX4 100
99,54% Intel DX4 100
100,00% Intel DX4 100 WB
103,23% Cyrix 5x86 100
108,76% Intel 486DX 66
115,68% Intel 486DX 50
123,55% Intel 486DX 33

My little retro computer world
Overdoze of the demoscene

Reply 44 of 52, by feipoa

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arncht wrote:

you could do similar trick at many cpus (k6, ppro, 6x, etc),

Which tricks are those? I haven't seen such broad reaching disabled enhancements on any other CPU.

Plan your life wisely, you'll be dead before you know it.

Reply 45 of 52, by Intel486dx33

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I have some VLB graphics cards.
How would you rate them.

Stealth 24
Stealth 64
Cirrus logic 5426
Cirrus logic 5428
Cirrus logic 5429
S3 xxxx

Reply 46 of 52, by kixs

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Stealth64 (depends on the exact model, but all are very good)
Here go all the rest from your list. S3 xxxx (what models? as some are very good and some not so in DOS).

Requests here!

Reply 47 of 52, by arncht

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Intel486dx33 wrote:
I have some VLB graphics cards. How would you rate them. […]
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I have some VLB graphics cards.
How would you rate them.

Stealth 24
Stealth 64
Cirrus logic 5426
Cirrus logic 5428
Cirrus logic 5429
S3 xxxx

Check the chipset on them. The 5429 is there, the 5428 is similar.

Last edited by arncht on 2019-04-27, 11:41. Edited 1 time in total.

My little retro computer world
Overdoze of the demoscene

Reply 48 of 52, by arncht

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feipoa wrote:
arncht wrote:

you could do similar trick at many cpus (k6, ppro, 6x, etc),

Which tricks are those? I haven't seen such broad reaching disabled enhancements on any other CPU.

Fastvid, cxt, etc

My little retro computer world
Overdoze of the demoscene

Reply 49 of 52, by feipoa

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CXT = chompter extended. Isn't this a version of the K6-2 rather than a software-based speed-up tool?

While I would include fastvid as a speed-up "trick" for graphics, I believe this trick is incomparable to the Cyrix 5x86 feature set. This is my opinion, but I do not consider re-enabling originally intended hardware features of the 5x86 as software tricks. Cyrix disabled these features to increase broad spectrum compatibility. There is one board which enabled most of these features by default, the M919 v3.4. I would not consider this capability as overclocked features.

Plan your life wisely, you'll be dead before you know it.

Reply 50 of 52, by arncht

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feipoa wrote:

CXT = chompter extended. Isn't this a version of the K6-2 rather than a software-based speed-up tool?

While I would include fastvid as a speed-up "trick" for graphics, I believe this trick is incomparable to the Cyrix 5x86 feature set. This is my opinion, but I do not consider re-enabling originally intended hardware features of the 5x86 as software tricks. Cyrix disabled these features to increase broad spectrum compatibility. There is one board which enabled most of these features by default, the M919 v3.4. I would not consider this capability as overclocked features.

Every util uses a special feature of the cpu, i cannot see any difference. The p3b also supported the write combining from the bios for the ppro based cpus, or at the video cards is also possible to change the lbf, timings.

It is on you, what you use, i wanted to do the most authentic way.

My little retro computer world
Overdoze of the demoscene

Reply 51 of 52, by feipoa

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Yes it is true, we all end up doing whatever we want...

Plan your life wisely, you'll be dead before you know it.

Reply 52 of 52, by dj_pirtu

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I have Cirrus 5434 -cards and noticed that those are blazing fast. I get 30MB/s with VGASPD.EXE benchmark. With 3DBench it gives 100. I'm running Am5x86 @150MHz (3x50MHz).
And yes, it likes 50MHz VLB-bus speed 😀