Re: Turbo Button & 486 Slowdown

Posted on 2011-06-03, 04:06

by

by Great Hierophant

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It looks like the program seems to equate the 486@8Mhz to be slightly slower than the 386DX40. Just FYI my 386DX-40 scores about 9.2 in SPEEDSYS. With the turbo button disabled it just seems to introduce wait states. I do have a 12MHz 286 board here, and when the turbo button is disabled Norton …

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Re: Turbo Button & 486 Slowdown

Posted on 2011-06-03, 04:05

by

by Great Hierophant

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It looks like the program seems to equate the 486@8Mhz to be slightly slower than the 386DX40. Just FYI my 386DX-40 scores about 9.2 in SPEEDSYS. With the turbo button disabled it just seems to introduce wait states. I do have a 12MHz 286 board here, and when the turbo button is disabled Norton …

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Re: Turbo Button & 486 Slowdown

Posted on 2011-06-03, 01:04

by

by Great Hierophant

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

http://xover.htu.tuwien.ac.at/~sub/8MHz.png This is my 486 at 8 MHz. The board is a PVI-486SP3 (SIS 496/497) with the turbo still on. Turning the turbo off is not as effective as either disabling the cache or running the system at 8 MHz, so it has to be the waitstates method. It looks like the …

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Re: Tandy systems compatible with normal 8 bit expansion cards?

Posted on 2011-06-03, 00:05

by

by Great Hierophant

in PC Emulation

in PC Emulation

You should be able to use an 8-bit VGA card in any Tandy 1000 except the original 1000/A/HD, as the internal video cannot be disabled, or the 1000 RLX/RSX, which have VGA on the motherboard. The 1000EX/HX use pins instead of slots, so an adapter will have to be hand-made. There are some, usually …

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Turbo Button & 486 Slowdown

Posted on 2011-06-01, 02:50

by

by Great Hierophant

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How slow can you make a 486 go? Most 486 motherboards, at least the OEM/sysem builder boards, support a turbo button. As I have read, the turbo can do one of three things to slow down the machine: 1. Cut the processor speed to 8Mhz 2. Insert wait states to simulate 8MHz speed 3. Turn off the cache …

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Re: Dosbox Graphics

Posted on 2011-05-25, 16:34

by

by Great Hierophant

in DOSBox General

in DOSBox General

I use three settings: First, the widescreen approach: fullresolution=1280x800, 1600x1000, 1920x1200 output=openglnb aspect=false scaler=none That will get you rows and columns of evenly sized pixels, every time. Second, the proper aspect ratio approach : fullresolution=1600x1200 output=direct3d …

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Re: How to use DD and HD 5.25 floppys on een TEAC HD 5.25 drive?

Posted on 2011-05-02, 03:26

by

by Great Hierophant

in PC Emulation

in PC Emulation

Ignore Quad Density/QD floppys. If you must have 720KB on a 5.25" floppy, use a High Density disk. Here are the basic rules of DD disks in HD drives : You can read a DD 360KB disk in an HD drive, assuming the disk is not copy protected. You can write to new and unformatted or degaussed DD disks, but …

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Re: Munt Reloaded - Development

Posted on 2011-04-22, 16:20

by

by Great Hierophant

in MT-32 Development

in MT-32 Development

Would anything be gained by using the Reverb ROM at this point? The emulator uses the other ROMs inside these machines already.

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Re: Is the LAPC-I really 100% MPU-401 compatible?

Posted on 2011-04-08, 02:04

by

by Great Hierophant

in DOS

in DOS

Do you have an conflict with IRQ2? A video, NIC or SCSI card perhaps? Poor IRQ cascading on your motherboard? What speed/type of system are you trying to run MM on?

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Re: Home-made MIDI-interface for the LAPC-I.

Posted on 2011-04-08, 01:48

by

by Great Hierophant

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As you see in the MCB-1 schematic, there is a hex inverter/buffer through which the TXD signal must go. Does your cable/circuit provide the buffer?

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Re: Sound Blaster Pro 1 versions

Posted on 2011-04-08, 01:41

by

by Great Hierophant

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My revision 3 has soldered OPL chips (all four), full contact fingers and an extra cap soldered directly to the legs of U25.

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Re: Sierra's Thexder

Posted on 2011-03-06, 20:40

by

by Great Hierophant

in DOSBox Games/Apps

in DOSBox Games/Apps

There is a program called "nokey" that came with CopyIIPC from Central Point Software. It should work in a real machine, but in DOSBox, it may or may not. You can find it here: http://retro.icequake.net/dob/

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Re: 320x200 to 1600x1200 rescaling

Posted on 2011-02-27, 21:49

by

by Great Hierophant

in DOSBox General

in DOSBox General

If my 1920x1200 monitor displays 320x200 graphics natively, it almost fills the screen at the 16:10. The remainder is a black border, which will change color if a game supports different border colors. Further testing shows using openglnb with aspect true gives the same result as my screenshot. Use …

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Re: 320x200 to 1600x1200 rescaling

Posted on 2011-02-27, 07:12

by

by Great Hierophant

in DOSBox General

in DOSBox General

This is what the end result looks like (screenshot taken from Elvira) :

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Re: 320x200 to 1600x1200 rescaling

Posted on 2011-02-27, 06:47

by

by Great Hierophant

in DOSBox General

in DOSBox General

Yea, the aspect=true switch basically corrects the issue of LCDs having square pixels while CRTs did not. With a CRT you simply adjusted the picture and "blew it up"until it filled the screen. You can tell by looking at 95% of all playthroughs / let's play videos. They are all stretched …

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Re: 320x200 to 1600x1200 rescaling

Posted on 2011-02-26, 18:30

by

by Great Hierophant

in DOSBox General

in DOSBox General

I tried that method, but I don't like it because the pixels are not the same size. I offer this as an alternative, using yhkwong's latest svn : [sdl] fullscreen=false fulldouble=false fullresolution=1600x1200 windowresolution=original output=direct3d autolock=true sensitivity=100 waitonerror=true …

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Re: Warcraft Orcs & Humans CD version question

Posted on 2011-02-10, 06:21

by

by Great Hierophant

in Milliways

in Milliways

Davros wrote: replacement docs have the manual for warcraft 1 if that helps Thats what I meant when I said "The only available manual scan is for the European version".

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Re: Warcraft Orcs & Humans CD version question

Posted on 2011-02-10, 03:33

by

by Great Hierophant

in Milliways

in Milliways

I dislike ressurecting old forums, but I had something interesting to add to the discussion and I did not think it warranted a new thread. I have two genuine Warcraft CDs. One I bought at Goodwill, one a friend gave to me. The friend's CD is marked MS-DOS, has a file date of 5/2/1995, a game version …

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Initial Thoughts on Acquiring a Toshiba Libretto 70CT

Posted on 2011-02-06, 06:00

by

by Great Hierophant

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I recently acquired one of these from a friend of mine and I have been putting it through the paces. Here is how it stacks up: The Good : Pentium 120MHz MMX with up to 32MB of RAM. Cache control in the BIOS allows for turning off. Can be overclocked to 166MHz. Video is a Chips and Technologu F65550 …

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Re: DIY retro 8-bit OPL2 Sound Card

Posted on 2011-01-21, 21:21

by

by Great Hierophant

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

and also some day, the world is going to run out of sound blasters And OPL2 chips :) Seriously, the project is concentrating on using OPL2 chips. I think it would be more useful to use OPL3 chips (although somewhat more difficult). In its current form, it is essentially remaking an Adlib card with …

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