Its an `Turbo XT clone' like the ST juko boards do.. I need that soundblaster for games that can use that soundcard.. Why its on IRQ2 is because those systems only having 8 IRQ adresses..
My IRQ adress map is as follows:
IRQ 0 - Timer
IRQ 1 - Keyboard
IRQ 2 - SB 1.5
IRQ 3 - Roland MPU-IPC-T interface
IRQ 4 - Serial port
IRQ 5 - SCSI HDD controller
IRQ 6 - (i think floppy 1.44MB controller card)
IRQ 7 - LPT parallel port.
About the SB i found this: http://www.oldskool.org/guides/oldonnew/sound
He saying that i need to add: SET BLASTER=A220 I5 D1 H5 T6 variable (only with the correct settings) why wont this variable installed in the autoexec.bat file when installing the driver software to harddisk..?
I have changed some IRQ adresses, because i red this:
or example, when the Sound Blaster was introducted in 1989, its factory default settings were I/O port 220 and IRQ 7 (the DMA channel was hard-wired to DMA 1, although later versions of the Sound Blaster let you change this). This was just fine until people wanted to play digitized sound at the same time they were printing in Windows: the machine either didn't play sound, or the printing stopped. Guess what? IRQ 7 is LPT1--your parallel port, where the printer is connected.
You can't run two devices off of the same IRQ at the same time. It's bad. So, Creative Labs decided to change the factory default to IRQ 5. That was good--but they were too late! Over 100 programs were written with Sound Blaster support by this time, and while they should have added the ability to specify the configuration of the sound card, many just hard-wired it to IRQ 7. Ouch. (Some were slightly more forgiving, but only slightly. Stellar 7 falls into this category; it will attempt to autodetect the IRQ used on the Sound Blaster, but it only goes for IRQ 3 or 7.)
When one of these old games (1991 or earlier) attempts to play digitized sound on a card that isn't at the factory defaults--port 220, IRQ 7, and DMA 1--the result can range from no sound, to digitized sound that "halts" after two seconds of play, to locking up completely. If this happens, you have two choices:
Open the hood and change the settings on your sound card to match the defaults, or
Patch the program to go to another IRQ.
Opening the hood is easy, but annoying. Patching the program is more difficult, but not entirely impossible. Let's start with a fairly easy example: CT-VOICE.DRV. This file comes with most early Sound Blaster installation software, and is used by some early games that didn't want to go through the hassle of writing the routines themselves. The factory default for CT-VOICE.DRV is usually port 220 and IRQ 7. These values are kept next to each other in the file, so if you load the file into a decent hex editor (or DEBUG.COM 😉 and search for the hex values 20 02 07 or 07 20 02, you'll usually only find it in the file once. Once found, change that 07 to 05, or wherever your Sound Blaster IRQ is (althought if it's not at IRQ 5 or 7, good luck getting it to work with anything). And just in case you're wondering why I tell you to search for "20 02" and not "02 20" for port 220 is because Intel machines are little-endian, so "220" is stored as "20 02" on a PC.
And then there's the wonderful world of DOS environment settings. When you install a Sound Blaster, it writes a line into your AUTOEXEC.BAT that looks something like this:
SET BLASTER=A220 I5 D1 H5 T6
This sets an environment variable that describes the settings of the Sound Blaster to DOS programs, including games. Some games read this environment variable to get the settings of the sound card, so if it's missing on your system, you'll have to add it. Here's a breakdown:
A determines the value of the I/O port address. In the above example, it's 220.
I determines the value of the IRQ. In the above example, it's 5.
D determines the value of the DMA channel. In the above example, it's 1.
H determines the value of the 16-bit DMA channel. In the above example, it's 5. Only Sound Blaster 16s and higher use this.
T determines the type of Sound Blaster it is. In the above example, it's 6. The available types are:
1: Sound Blaster 1.0 (the original Sound Blaster)
2: Sound Blaster 1.5
3: Sound Blaster 2.0
4: Sound Blaster Pro
5: Sound Blaster Pro with OPL 3 FM chips
6: Sound Blaster 16
Ive have changed IRQ 5 to SB 1.5, IRQ 3 to SCSI HDD (could only use IRQ3 or IRQ 5) and roland MPU-IPC-T to IRQ 2. Tested the SB 1.5 and seems the work.
Only like to have more info about CTVOICE.DRV.. And what i need to execute on startup.
~ At least it can do black and white~