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SB CT2900 knocked off a capacitor

Posted on 2024-02-29, 22:57

I knocked off a capacitor when fitting this SB16 CT2900 into an ISA slot. It has been in my attic for a good 20 years. https://www.vogons.org/download/file.php?mode=view&id=186950 Capacitor is labelled C7 and it is next to the edge ISA connector pins. Just wondering what this is likely for in that …

Re: Review: Sound Blaster PCI 128 (CT4810)

Posted on 2024-02-19, 18:07

Another update regarding digital CD audio over the ATA interface in pure DOS. In games like Tomb Raider, which both stream data and play CD audio from the disc, distortions do occasionally appear. Also, I did try attaching the CD-ROM on the secondary channel as the only device, and the distortions …

Re: A strange partition table problem with MS-DOS...

Posted on 2024-02-19, 17:45

in DOS
What's the actual use case for a 2tb drive/volume/partition for Dos/Win95|98|ME? First of all I had a few 2TB SSD drives left over from work, that's the main reason I tried this. Also to test if the maximum limit of MBR which is 2TB works reliably with no data loss in DOS/Win9x. The use case was …

Re: A strange partition table problem with MS-DOS...

Posted on 2024-02-18, 17:04

in DOS
The disk in question is very large (2TB), and is used for data, not booting. That's the practical maximum I could use on those relatively old systems... I wonder how large disks could MS-DOS 7.1/8.0 handle. I know Windows 9x had a 137GB barrier by default, but not sure if that was also applicable …

Re: Review: Sound Blaster PCI 128 (CT4810)

Posted on 2024-02-15, 16:51

Speaking of which, General MIDI works by using ECW sets for the softsynth, which is Ensoniq's proprietary format. The driver CD contains three sets in total: 2MB, 4MB and 8MB with the last one arguably providing the best quality. You can switch between these sets from the driver panel at any time. …

Re: Review: Sound Blaster PCI 128 (CT4810)

Posted on 2024-02-15, 16:36

Haha, FM emulation was terrible on these. I think this emulator was later reused and improved for the Live! series of cards, though I don't think it ever sounded pleasant. Couldn't you fix that by always selecting Adlib or OPL2 in games' setup options instead of SB16 or OPL3. I think I remember …

Re: Aweutil /EM option - speed sensitive

Posted on 2024-01-03, 14:14

I recommend you to load normally your config.sys and autoexec.bat and start a protected mode game with DOS32AWE, then exit the game and without rebooting the PC run a real mode game that used to cause I/O CHANNEL CHECK error. I ran the game Screamer, first renamed DOS32AWE to dos4gw in the game …

Re: Aweutil /EM option - speed sensitive

Posted on 2024-01-01, 23:53

Which version of AWEUTIL are you using? Try to use the latest one. AWEUTIL likes higher CPU speeds. The BIOS must not trap the NMI first. AWEUTIL stays earlier if not on top of the NMI handlers chain. Either for some reason the NMI vector in the interrupt table is overwritten back with the BIOS …

Re: Aweutil /EM option - speed sensitive

Posted on 2023-12-31, 20:30

AWEUTIL will not work in protected mode. You have to use the DOS32AWE utility. https://www.vogons.org/viewtopic.php?f=62&t=83065 These are all real mode games from crica 1988-1990. I'm not running emm386 only umbpci so the cpu is also in real mode. I've tried the above for protected mode games and …

Aweutil /EM option - speed sensitive

Posted on 2023-12-31, 13:54

Over the week I've been testing a CT4520 AWE64 card in DOS. Everything works apart from: After running Aweutil /EM:MT32 command it shows: SYNTHMT.SBK loaded Set MIDI emulation to MT32 Reverb: ########################### Chorus: ########################### TSR installed. Then when I run a game like …

Re: SB64AWE memory size in Dos games

Posted on 2023-12-26, 18:42

So to clear this up, all AWE32/64, even value cards like CT4520 have a minimum of 1MB, split between 512kb ROM and 512KB ram. Some Dos games can upload samples in the 512KB RAM portion but the default 512KB instruments shipped with the card in ROM stay untouched. eh. sorta. your nearly there! …

Re: SB64AWE memory size in Dos games

Posted on 2023-12-26, 15:52

I think your confused. All AWE32+AWE64 had the same ROM. the AWE64 Gold had 4mb RAM, not ROM! for games that uploaded samples, if they worked on the 512kb card, they will sound the same on the 4mb. I know of no games that downsampled to fit lower memory. So to clear this up, all AWE32/64, even …

Re: SB64AWE memory size in Dos games

Posted on 2023-12-21, 00:14

I think your confused. All AWE32+AWE64 had the same ROM. the AWE64 Gold had 4mb RAM, not ROM! for games that uploaded samples, if they worked on the 512kb card, they will sound the same on the 4mb. I know of no games that downsampled to fit lower memory. What still confuses me is the cards with no …

SB64AWE memory size in Dos games

Posted on 2023-12-19, 00:46

I was given CT4520 AWE64 value card, it has 512KB onboard ROM (very noisy cards, compared to a VIBRA CT4180). I'm wondering for all Dos games that natively support AWE32/64, would I hear better quality sample music using a 64AWE Gold card that has 4MB ROM (i;m not talking about uploading sound fonts …

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