Re: Rack recommendations for Midi devices etc.?

Posted on 2021-03-28, 16:19

by

by BloodyCactus

in Marvin \ Sound

in Marvin \ Sound

well.. of course. the mt32 is not a rackable device. sc88 is what, 2u tall instead of 1u. some things are just not designed to be racked (mt32/cm64 etc). you just put them on a shelf on their own as either 1u or 2u tall and it is what it is.

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Re: Rack recommendations for Midi devices etc.?

Posted on 2021-03-25, 20:34

by

by BloodyCactus

in Marvin \ Sound

in Marvin \ Sound

its standard 19" rack stuff. amazon, ebay, everyon sells it. you just need some rackshelves to sit the midi modules on since they are half width.

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Re: DOSBox-X branch

Posted on 2021-03-24, 12:28

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by BloodyCactus

in DOSBox Patches

in DOSBox Patches

Right, PCJR and Tandy are not the same with graphics ram. pcjr has its video memory at a fixed location, not matter how much base ram you had! (always at 128kb). tandy always moved it at top of ram. pcjr triggers irq5 for every vertical retrace , tandy does the same and uses irq 2 for hard drives …

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Re: DOSBox-X branch

Posted on 2021-03-24, 01:22

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by BloodyCactus

in DOSBox Patches

in DOSBox Patches

INT 10h will change memory size at 0x413 to either (true memory size - 16KB) or (true memory size - 32KB), right? int 0x10 is bios. DOS does not hook int 10h and will not change the memory based on video mode change. I have tandy dos 3.3 and I dont remember it doing that, and I know dos 5/6 do NOT …

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Re: DOSBox-X branch

Posted on 2021-03-23, 21:09

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by BloodyCactus

in DOSBox Patches

in DOSBox Patches

as someone who has a 1000sx and wrote a util to manage the graphics memory, only the word at 0x413 changes. any game that assumes > 16kb will destroy any MCB headers. you need to run a util to set it to 32kb or more like first thing (and they work by modifying the MCB chain headers).

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Re: Multiple disk images

Posted on 2021-03-19, 18:23

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by BloodyCactus

in DOSBox General

in DOSBox General

do it from the commandline, dosbox floppy1.img floppy2.img floppy3.img then inside dosbox, use the hotkey to switch to next disk and cycle through the list. youll have to look up what the hotkey is.

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Re: Amiga vets, I need your help with building a plipbox

Posted on 2021-03-17, 13:15

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by BloodyCactus

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I ordered 5 pcs of kudo68k's plipbox PCB here: https://github.com/kuro68k/plipbox According to a post on git https://github.com/kuro68k/plipbox/issues/1 the circuit for RS232 connection to the Amiga requires 47mF 100nF and 330nF parts as well as MAX3221 transceiver. I actually have the passives but …

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Re: Did you create maps for games?

Posted on 2021-03-15, 14:06

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by BloodyCactus

in Milliways

in Milliways

oh man I def made stunts maps. so few cars could do the loop the loop! 🤣.

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Re: Did you create maps for games?

Posted on 2021-03-15, 12:41

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by BloodyCactus

in Milliways

in Milliways

konc wrote on 2021-03-15, 10:21: Oh at first I thought this was about mapping a game, like sketching the map of a text adventure 😀 🤣 mee too, and I did that. I graph paper mapped Pool of Radiance and other gold box games.

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Re: Help on S.M. Baker's 2MB EMS/Flash 8-bit ISA card

Posted on 2021-03-09, 15:29

by

by BloodyCactus

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

well, the ems page must must be 64kb. thats what the official EMS specifications say, so it cant be less, so the driver probably assumes that amount.

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Re: 20mhz 286's

Posted on 2021-03-06, 18:03

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by BloodyCactus

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

if you want a fast 286, get a 386sx 😀 I have a couple of harris 25mhz cpus but had some issues getting them going with oscillator swaps. I suspect the board layout was too noisy for 25mhz with its support chips and such and how it ranc traces.

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Re: Any memory optimizations on 8086 CPUs with EMS ?

Posted on 2021-03-04, 21:02

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by BloodyCactus

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I wrote a umb.sys for my tandy 1000sx, so I can use umb's and higher ram. EMS eats a lot of ram and not a lot of things actually use EMS. (its good for say norton ncache2). but you can sacrifice ems, get 64kb page frame back and use it for UMB memory. umb requires dos5 or higher. if your running …

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Re: imgmount question

Posted on 2021-03-04, 20:59

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by BloodyCactus

in DOSBox General

in DOSBox General

Hmmm I agree and disagree here. I agree in so far as that I understand DOSBox shouldn't cater to every niche possible, on the other hand there are people wishing to run software that only runs properly on Windows 9x/ME for example. With a better integrated disk image support this would be a lot …

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Re: DOSBox-X branch

Posted on 2021-03-04, 18:40

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by BloodyCactus

in DOSBox Patches

in DOSBox Patches

I assume you tried: [gus] gustype=interwave gusmemsize= is indeed limited to 1024KB. Not sure if that is simply a matter of raising the limit, or if that requires more work to support. What is the max RAM a interwave adapter supports? gustype=interwave setting is more or less irrelevant. it doesnt …

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Re: Help getting more than one Sound Card to play nicely in DOS

Posted on 2021-03-03, 00:40

by

by BloodyCactus

in Marvin \ Sound

in Marvin \ Sound

I have an AWE32 + Gravis Interwae PnP working just fine together. I used to use CTCM and IWInit but switched over to Unisound. I would say, stick your AWE64 in first, use ctcm/ctcu to setup its pnp config to correct addresses and such, disable what you dont want etc to free up IRQ's, then add the …

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Re: DOSBox-X branch

Posted on 2021-03-02, 21:15

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by BloodyCactus

in DOSBox Patches

in DOSBox Patches

is any work being done on interwave support? because none of it actually works, looking over the gus.cpp. no app will ever detect interwave, ram is restricted to max 1mb, etc.

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Re: Retro Development

Posted on 2021-03-02, 12:50

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by BloodyCactus

in Milliways

in Milliways

There are some interesting threads over there but there are only 13 threads in total. :smiley: http://www.vcfed.org/forum/forumdisplay.php?18-Vintage-Computer-Programming It's kinda interesting. Programming retro computers is such a vast topic and a lot of people were involved in it back in the day …

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Re: DOS drivers, .sys vs executable

Posted on 2021-03-01, 18:21

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by BloodyCactus

in DOS

in DOS

as someone who has written both, there are a few issues when developing with .sys files, 1 - The whole DOS api is not available to you, you have a limited set of api (honestly its not a big deal, but its not all there) 2 - Because the system is in transition when you get control at the .sys level …

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Re: Services for Unix 2.0

Posted on 2021-03-01, 13:04

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by BloodyCactus

in Milliways

in Milliways

Well, 1.0/2.0 SFU was a buggy mess. I think later 3.5 was ok. If you wanted to build stuff you were better off using djgpp and all its installed packages for api's.

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Re: Network Programming

Posted on 2021-03-01, 13:00

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by BloodyCactus

in Milliways

in Milliways

since your using djgpp, just remember all those packet drivers are realmode and when receiving/sending, use lot of interrupts so your going to spend a good bit of time switching to v86/realmode to use callbacks for the packetdriver which can be really costly.

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