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Re: Dos memory woes

Posted on 2022-07-03, 00:09

in DOS

in DOS

The options also don't seem to include a NOEMS, now it doesn't normally hurt to have EMS enabled (unless using EMM386 at all is incompatible with games that do their own memory management), but it's 64k that can't be used for UMB and also splits the available UMB space into 2 smaller areas

Re: What is the purpose of 24-bit vs 32-bit as a desktop resolution?

Posted on 2022-06-16, 22:35

in Marvin \ Video

in Marvin \ Video

800 x 600 could have fitted into 2MB as 24 or 32 bit, 1024 x 768 can't, the only real memory economy issue from way back is 640 x 480, which could fit in 1MB as 24 bit but not as 32 bit. Another paradox from way back is that 256 colour was usually faster than 16, as each pixel was a whole byte so no …

Re: How does a motherboard know which voltage to supply to a CPU?

Posted on 2022-06-10, 23:14

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There is old style, YOU set it, for things like Super Socket 7. New style like in LGA775, where the CPU uses the FID pins to request a FSB clock and the VID pins to request a voltage, plus additional dynamic selection according to speedstep (set multiplier and voltage) Now when the transition was …

Re: Motherboard cache question

Posted on 2022-05-27, 21:41

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I looked at the possibility for a similar system... 64K x 8 are rare and expensive beasts indeed

Re: 1994 AMD PC-net PCI II 10BaseT network card incompatible with my router?

Posted on 2022-05-26, 23:18

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Should be straight to a router in any case. When a router is auto negotiating , make sure to set the card duplex to auto

Re: EMS memory mystery ?

Posted on 2022-05-17, 23:02

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

One tip, for EMS & UMB, move the EMS page frame down to the top of the ROM, to avoid splitting the UMB into two spaces, that way you don't need tricky MEMMAKER zone selection for packing

Re: Experiences Upgrading Socket 7 Cache from 0KB -> 512KB? Recommended Video Card? Best 1993-98 Games for Pentium 200M

Posted on 2022-05-15, 23:34

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Cache has diminishing returns moving from FPM RAM, to EDO, to SDRAM - with SDRAM, the burst speed is the same, but the cache delivers the start a few cycles quicker But it does always have some return, even with SDRAM. Why not go for 64MB SDRAM if you can - the max cacheable range of the VX chipset, …

Re: Floppy Drive capability question.

Posted on 2022-04-30, 23:46

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The fancy formatter I used was http://toastytech.com/files/nformat.html - and as I had quite a lot of DD 5 1/4", I used them as 800k - I think my system did handle them without the driver. Also, the documentation describes the problem with 360k in a 1.2Mb drive... the 80 track drive writes alternate …

Re: Floppy Drive capability question.

Posted on 2022-04-27, 23:55

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

And then next question, will a DD drive, read a HD disk written as a DD disk? Ex. 1.2mb disk, only 720k written on it. Those two should never meet, 1.2MB is 5 1/4", 720k is 3.5" (unless you use a wierd formatter that may need a TSR for reading - I formatted 5 1/4" DD to 800k that way, but can't …

Re: Degaussing floopies

Posted on 2022-04-13, 23:13

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The default DOS FORMAT needs a /U to tell it to "really" format. One of the alternatives, not sure if it's NFORMAT or FDFORMAT, can also do a 2 pass whole disk format, whole disk verify (which may pick out problems with drives not tracking reliably) A permanent magnet strong enough to wipe the disk, …

Re: Windows for Workgroups “Extremely Low on Memory”

Posted on 2022-04-07, 19:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Windows 3 just barfs when converting a lot of icons, I seem to recall from way back, not sure if it's an under 1MB consumption issue than can be aided by Fix1MB / 1MBFort / syshook.drv

Re: General question about RPC1 firmware

Posted on 2022-03-15, 00:26

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

RPC1 kind of fell out of favour, as it moved the problem to software, the more powerful, all conquering solution was RPC2 autoreset / uncounted changes, I forget which drives were amenable to that

Re: New power supply for Pentium MMX

Posted on 2022-02-27, 23:22

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You might need an ATX-AT adapter with a -5V regulator - or a voltage blaster -5V card in a spare ISA slot

Re: Strong wind advice

Posted on 2022-02-22, 19:40

in Milliways

in Milliways

Strong wind advice .... don't eat baked beans

Re: How do PCI IDE cards supply IRQ14 and IRQ15?

Posted on 2022-02-22, 19:38

in PC Emulation

in PC Emulation

The TEKRAM DC290N PCI IDE included a paddleboard to connect into an ISA slot

Re: Freeciv 3.0.0

Posted on 2022-02-19, 19:02

in Release Announcements

in Release Announcements

Not sure, is that something that requires the original?

Re: New sold Hardware Solution that support capture of the BIOS/ Boot process from VGA output

Posted on 2022-02-16, 00:44

in Marvin \ Video

in Marvin \ Video

Don't know how well it would work, but I was thinking of trying to use a VGA to HDMI and a HDMI USB capture device to try and record VGA - not sure it would like the BIOS mode though, I think that can be a funny resolution

Re: Thinking of acquiring a pair of studio monitors - what else is required to use them as PC speakers?

Posted on 2022-02-11, 00:13

in Marvin \ Sound

in Marvin \ Sound

If they are unamplified (speaker terminals), you could try one of these https://www.aliexpress.com/item/1005003100996665.html Insanely cheap for a class D amp that is also a USB soundcard

Re: Hello! I am new. Here is my Retro PC story

Posted on 2022-01-31, 19:45

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

CACHECHK would be good for testing the amount and timings of the cache, or if the cache is only partial

Re: Can I use this CPU in a Motherboard ?

Posted on 2022-01-31, 19:32

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://en.wikipedia.org/wiki/Intel_i860 A piece of history and a display piece, but that's about all

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