Re: Mapping ROM content to memory
Posted on 2022-07-04, 19:45
jakethompson1 wrote on 2022-07-04, 19:20: You can boot a DOS floppy that has DEBUG on it, and in debug do: d f600:0000 Good advice. I will try that on my working 286 motherboards first.
Re: Mapping ROM content to memory
Posted on 2022-07-04, 19:03
I know about possible problems on non-original hardware, but I still want to experiment on 80286 motherboards.
Re: Mapping ROM content to memory
Posted on 2022-07-04, 12:56
The problem is how to connect a ROM to ISA bus. As I understand ROM chip 'output enable' must be connected to ISA "MEMR". All data and address pics from ROM must be connected to corresponding ISA lines. And additionally address lines from ISA should be analyzed with logic (to select required address …
Mapping ROM content to memory
Posted on 2022-07-04, 12:06
Hello everyone. I need to make an ISA card with a single 32kb ROM chip (IBM cassette BASIC) Chip content must be mapped to a specific memory address (0xF6000). I have never done this before and now trying to find any information.
Re: IBM ROM Basic - option ROM for PC clones
Posted on 2022-06-21, 18:28
Thanks for this! I will try it ASAP. But does anyone know some way to emulate cassette basic ROM? So it will be possible to run basic from PC-DOS 1.10?
Re: Identifying floppies from non IBM compatible system
Posted on 2021-10-23, 10:25
Ok so i have found some info. Looks like first track on CM1810 are different that usual. I am using IMD 1.18 for making images. Does anyone know any tool to extract files from them? Every floppy has a list of files orinted and I want to compare. I need soehow to see that the images I made are proper …
Identifying floppies from non IBM compatible system
Posted on 2021-10-21, 19:16
I have found some floppies from some unknown system. They probably were used on some soviet computer located in one of the aircraft factories. They have different software and utilities. The floppies are standard 5inch 360kb floppies (not sure how they were formatted tho) and have markings CM1810 …
Re: ESS AudioDrive (ES1868) - a surprisingly good ISA sound card
Posted on 2021-05-09, 16:46
Thanks for the information. Do you also know what J6 connector is for? Ok looks like its Hardware Volume Control Connector. Confirmed by screwdriver.
Re: ESS AudioDrive (ES1868) - a surprisingly good ISA sound card
Posted on 2021-05-09, 12:53
Can anyone tell me what J6 connector from the image in the topic is for? Wrong image reference Is that PC speaker? Also what AuxB volume control in 1868 card is?
Re: Can't finde Phils Starter Pack for MS-DOS 6.22
Posted on 2021-03-26, 17:20
https://www.philscomputerlab is not accessible from Ukraine too. I think there is some kind of IP block on his hosting service.
Re: DOSMid - an open-source MIDI player for DOS
Posted on 2021-01-22, 18:15
I got IBK files by converting bnk files from Descent using Wohlstand's/OPL3BankEditor. Midi files was converted from hmp file from Descent. I have attached all files. I wonder if there is a way to play them as in game. Filename DOSMID FILES.zip File size 56.68 KiB Downloads 91 downloads
Re: DOSMid - an open-source MIDI player for DOS
Posted on 2021-01-21, 11:16
Ok looks like it was my mistake of using; instead, when telling the program what banks I want to be loaded. But there is one more problem. I am trying to play music from Descent and using melodic and drums banks. But the music sounds totally different. Any advice? Is it possible to make it sound …
Re: DOSMid - an open-source MIDI player for DOS
Posted on 2021-01-21, 10:12
I am trying to use dosmid with ibk files to make the music sound as intended by game developer I have converted bnk files to ibk using OPL3 Bank Editor but Dosmid gives me an error when I try to use them.
Re: FM synthesizer in DOS and Windows
Posted on 2021-01-20, 14:01
Oetker wrote on 2021-01-20, 13:55: See Windows, Doom, Apogee OPL3 Synthesizer. Thank you! That might come in handy Is it emulator or it uses cards FM synthesizer?
Re: FM synthesizer in DOS and Windows
Posted on 2021-01-20, 13:52
jmarsh wrote on 2021-01-20, 13:49: If you tell the game to use adlib/OPL2/OPL3 and not general midi for music it should sound the same regardless of whether you're running it under windows or DOS. Yes I have figured it out. I wish there was a way to make it sound originally in Windows without …
Re: FM synthesizer in DOS and Windows
Posted on 2021-01-20, 13:39
So the only best and genuine result would be to play FM music from games in DOS?
Re: New sound card project: AWE64 Legacy
Posted on 2021-01-20, 13:35
But still there are tons of them now. Its just sad that no one have cloned AWE32 and AWE64 chips
FM synthesizer in DOS and Windows
Posted on 2021-01-20, 13:28
I have noticed that FM synth sounds completely different in windows and DOS (native or windowed). For example Descent midi files sounds so bad in windows when using midi player (FM synthesizer output) and sounds great when using OPL in DOS. Tis is true for any soundcard that supports FM synthesis. …
Re: New sound card project: AWE64 Legacy
Posted on 2021-01-20, 13:20
There are lot of of cloned OPLs (like LS262) on cheap sound cards
Re: New sound card project: AWE64 Legacy
Posted on 2021-01-20, 07:56
I hardly can find any AWEs locally (have found only 3 during last few years ). And paying over $100 on ebay is too much for me (#thirdworldproblems :D). So I feel kinda sad when I see old card being used as donor to make the more expensive one. Simmconn was the other thing as the new version costs 3 …
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