Re: EMS memory mystery ?
Posted on 2022-05-17, 23:02
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
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
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
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
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
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
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
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
Re: How do PCI IDE cards supply IRQ14 and IRQ15?
Posted on 2022-02-22, 19:38
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
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
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
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
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
https://en.wikipedia.org/wiki/Intel_i860 A piece of history and a display piece, but that's about all
Re: 10 pin 44256 chips
Posted on 2022-01-25, 22:18
4 of them is 1MB, so it's going to be 1MB to 2MB - the difference: 1MB tops out at 640x480 truecolour, 800x600 64k colour, 1024x768 256 colour 2Mb ups the last two to truecolour and 64k
Re: Choosing 386 motherboard and CPU
Posted on 2022-01-25, 21:54
The fastest "real" 386 is AMD's 386DX40, on a board which has cache and an IIT 4C87DLC-40 FPU for the FPU You could go higher with some 386->486 type hybrids, but if that's the speed target, a 486 would be a better choice to begin with
Re: CD-rom drive is detected as secondary slave instead of secondary master
Posted on 2022-01-22, 19:00
The drive might be in cable select, the end of a 40 pin CS cable selects slave, the drive will have a jumper block for MA, SL and CS - put the jumper to MA
Re: Q: EDO vs. FPM - how to tell which is which
Posted on 2022-01-09, 20:23
Of the most common modules, -70 is likely to be FPM and -60 is likely to be EDO There may well be FPM chips that are faster then 70nS (but rare), and pretty sure EDO was never in 70nS specification
Re: Need help with basic electronic diagram & parts - setting up logic for a two colored LED
Posted on 2022-01-04, 00:12
With no resistors in the LED wires, adding a diode voltage drop can make a much simpler switch Also, I don't know if "Elektor" or their TUP TUN DUG DUS definitions are still around, but the transistor is TUP (universal PNP) and the diode is DUS (universal silicon), your favourite 2N series, BC …
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