Re: is it worth getting a 1600x1200@160Hz 19" CRT?

Posted on 2022-04-06, 19:59

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It is of course a matter of opinion, but mine is that the complaint that sharper CRTs are "too sharp" for DOS games is a complete load of shit. They look awesome with crisp pixel edges and visible scanlines. Blur belongs in the toilet

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Re: is it worth getting a 1600x1200@160Hz 19" CRT?

Posted on 2022-04-06, 14:21

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There is nothing like a high quality pc CRT running at high resolution

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Re: Keen 4/5 monitor flicks

Posted on 2022-04-05, 20:30

by

by maxtherabbit

in Marvin \ Software

in Marvin \ Software

The real issue here is why the game won't load for you after saving the "SVGA compatibility mode" setting. That setting exists to fix your exact problem, and it should in no way stop the game from loading

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Re: Windows NT games that do not require 3D accelerator

Posted on 2022-04-05, 14:58

by

by maxtherabbit

in Windows

in Windows

Based on my memory of using win2k when it first came out - the vast majority of win32 games run on it just fine

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-05, 14:56

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You absolutely sure of that? I only know Zymos as a bottom-feeding chipset relabeler; just lke PC Chips later would, they just slapped their name on other peoples' silicon. I have (or had, not 100% sure if it's still here) an ISA VGA card with "Zymos Poach 51 AA" chipset, which in fact is a Trident …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-04, 13:10

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

as long as its a storage scope even 2 channels are fine. Grab Clock and one of the R/W strobes, count cycles during long read/write, this will let you see where the slowness comes from (rarer transactions or artificial waitstates) http://www.ee.nmt.edu/~rison/ee352_fall09/PC104timing.pdf I see what …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-04, 13:09

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Zymos POACH chipset ? Never heard of it before. Is that the name for the intel N82230& N82231 combo? Yes, intel bought the rights from Zymos You absolutely sure of that? I only know Zymos as a bottom-feeding chipset relabeler; just lke PC Chips later would, they just slapped their name on other …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-04, 03:30

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I found the board on Ultimate Retro https://www.ultimateretro.net/en/motherboards/6702 Unfortunately the listing doesn't offer any documentation. The DIP switch for the memory size does seem to conform to this similar listing, with the exception of the absence of the SW1/5 switch and the associated …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-04, 03:19

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

not the clock, check how many cycles read/write strobes last, and how many cycles they repeat. Normal ISA read/write takes 4 cycles with r/w strobe lasting 1 clock cycle. For what purpose? I'm willing to examine it if it will help the cause, but since I don't have a real logic probe it will be a …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-04, 03:15

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You said your et4000 got 4mb/sec on your 286. What speed are the isa slots running at in that setup? 10MHz Yes it's faster, no that doesn't explain the situation. All ISA cards I've tried vastly underpeform on this board. Doom scores are way below par for a 486-33 despite good memory and cache …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-03, 19:06

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've attached a dump of the BIOS if anyone is interested to see for themselves This would be an impressive early 486 board, if not for the fact its from December 1990 or later (9052 datecode on one of the jellybin chips), >1.5 years after 486 release. This makes it impressively outdated design still …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-03, 18:51

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

not the clock, check how many cycles read/write strobes last, and how many cycles they repeat. Normal ISA read/write takes 4 cycles with r/w strobe lasting 1 clock cycle. For what purpose? I'm willing to examine it if it will help the cause, but since I don't have a real logic probe it will be a …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-03, 18:49

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Zymos POACH chipset ? Never heard of it before. Is that the name for the intel N82230& N82231 combo? Yes, intel bought the rights from Zymos Have you tried using the old AMISETUP program to tweak hidden bios settings/timings ? No because I seriously doubt this will bear fruit. This is the 1990 pre- …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-03, 12:08

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

rasz_pl wrote on 2022-04-03, 10:53: Its most likely for the ram and screwing with it will not do anything useful stick the scope on ISA bus while running VIDSPEED.EXE I've already monitored the ISA clock while flogging the system with various form of video test software. The clock does not modulate …

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Re: 486 Motherboard with abysmal ISA performance

Posted on 2022-04-03, 02:49

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've verified the ISA bus is running at 8MHz by sticking a scope on the clock pin in the slot. I haven't really poked around the delay line chip at all yet, to see which taps are being used or where they go. Decided to make a thread first just in case someone said "no retard that delay line is for …

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486 Motherboard with abysmal ISA performance

Posted on 2022-04-02, 19:48

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've got a pretty neat 486 board here. Built in 1991, it uses a Zymos POACH chipset (designed for 286 systems) grafted to a 486 processor and cache with the help of a bunch of PAL/GALs and discreet logic. My issue with it is that despite using an ET4000AX card which will manage >4MB/sec on a 286 …

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Re: I was offered some free "flat screen" monitors, but it was not what I had expected

Posted on 2022-04-02, 15:42

by

by maxtherabbit

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That NEC display is phenomenal. Where are these located? I'd go pick it up myself if you don't want it

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Re: SB Awe32 Upgrade Card - Goldfinch! CT1920

Posted on 2022-04-02, 14:38

by

by maxtherabbit

in Marvin \ Sound

in Marvin \ Sound

Here are the files that CT1920 CD installs : http://www.tmeeco.eu/BitShit/PCschit/CT1920.zip There's AWEUTIL.EXE instead of normal AWEUTIL.COM, with much bigger size. I imagine it has some protected mode component to trap IO writes and whatnot. Basic inspection shows: That's true. This AWEUTIL …

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Re: AWE64 card and Dream Blaster X2 GS ?

Posted on 2022-04-01, 16:09

by

by maxtherabbit

in Marvin \ Sound

in Marvin \ Sound

AFAIK functionally all of those are the exact same

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Re: Long Files Names under DOS (Utility to bypass 8.3 format?)

Posted on 2022-03-31, 19:10

by

by maxtherabbit

in DOS

in DOS

DOSLFN

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