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Hardware Programming Guide - Page 2
... THAN FOR THE ABOVE SAID PURPOSE, WITHOUT THE EXPRESS WRITTEN CONSENT OF CREATIVE TECHNOLOGY LTD..
By downloading and/or using this manual and software, Licensee agrees to be bound to , any implied warranties of merchantability and/or of all necessary correction, servicing, or repair. RESERVES ALL RIGHTS NOT EXPRESSLY GRANTED TO LICENSEE IN THIS LICENSE...
Hardware Programming Guide - Page 3
... or other consequential, incidental, special, or punitive damages, arising out of the purchase, use, inability to use prior to change without limitation, any interruption of services, lost profits, lost savings, loss of data, or any errors in the manual and software even if Creative Technology Ltd.
Hardware Programming Guide - Page 4
...Should Know...ix Scope and Manual Organization...ix Document Conventions...x Determining User's Sound Blaster Card ...xii Determining User's Card Settings...xiii
Chapter 1
Hardware Overview... Handling Interrupts from DSP ...2-4 Sharing of Interrupts...2-5 Configuring DMA and Interrupt Settings ...2-6
Chapter 3
Digitized Sound I/O Programming
Digitized Sound Operation Modes ...3-2 Digitized ...
Hardware Programming Guide - Page 8
...cards conform to the main Creative-specific Sound Blaster hardware components; The Digital Sound Processor handles digitized sound recording and playback. It supports 8- Through this port, MIDI... 16 with Advanced Signal Processing
TM
TM
This manual documents the programming interface to the International MIDI Association specifications. It also controls the selection of various input...
Hardware Programming Guide - Page 13
... However, the hardware also supports transfer 16-bit sound data via 8-bit DMA channel. If "Mmmm" is not specified, the mixer chip base I/O port will set such that there is as...environment variable during card installation. The user will be at least one space between each setting. Introduction
xiii
Determining User's Card Settings
Most of the Sound Blaster card settings are the same 8-...
Hardware Programming Guide - Page 18
... X-RAM 128 x 16-bit of the Advanced Signal Processor, including downloading, is handled by a device-level driver called CSP.SYS. You can access this device driver via the Creative Multimedia System (CTMMSYS) driver. Refer to the chapters "Creative Multimedia System Driver" in the Programmer's Guide and Library Reference manuals for digital audio data Runs at 12 MIPs
The control...
Hardware Programming Guide - Page 28
...Setup register, addressed as register 80h on the Mixer register map, is used to configure or determine the Interrupt Request line. No, chain to DSP Programming
The following assembly code fragment illustrates the interrupt handling portion within a 16-bit DMA mode digitized sound I /O instructions... Settings
With the DSP version 4.xx, the DMA channels Interrupt Request (IRQ) line are...
Hardware Programming Guide - Page 33
... rate of the timer interrupt is supported. The frequency of direct mode is 1 for mono and 2 for the commands to program the DSP. Refer to be set the transfer rate, you may either..." for that particular transfer rate. To set before any transfer is required. Only the high byte of times needed for details on how fast the interrupt service routine can be done first. In the...
Hardware Programming Guide - Page 34
...used for the transfer to half of the subsequent sub-block. The DMA controller and DSP are supported. The DSP block transfer size is exhausted. At the end of the transfer.
Each sub-block...a 64 KB physical page boundary. All sub-blocks are transferred until the data is then set to begin. The application allocates a stationary DMA buffer which must not straddle the physical page...
Hardware Programming Guide - Page 36
... data is used by the DSP as ADPCM (Adaptive Delta Pulse Code Modulation). The DSP supports decompression in the output process only. There are two different sets of output commands used to be transferred, which do not contain reference bytes, use another set of data to operate on using these ADPCM output commands. The...
Hardware Programming Guide - Page 41
...
The general steps for programming the DSP for digitized sound data transfer in the interrupt service routine to start I/O transfer. Program the DSP for the next block. Restore machine... more data blocks to transfer. Program the DMA controller for the next block.
Set up the interrupt service routine. Preserve machine status. Transfer data between the DMA buffer and storage buffer....
Hardware Programming Guide - Page 42
... off. outp(wSBCBaseAddx+0xC, 0x40) outp(wSBCBaseAddx+0xC, bTimeConstant)
4. 5.
6. Turn on the DAC speaker outp(wSBCBaseAddx+0xC, 0xD1) Program the DMA controller for digitized output. Set the DSP transfer Time Constant.
Set up the DSP interrupt service routine. Digitized Sound I /O command followed by data transfer count.
Hardware Programming Guide - Page 44
... the steps needed to start auto-initialize DMA mode transfer.
Set up the DSP interrupt service routine. outp(wSBCBaseAddx+0xC, 0x48) outp(wSBCBaseAddx+0xC, wBlkSize...+0xC, 0x40) outp(wSBCBaseAddx+0xC, bTimeConstant)
2. 3. 4.
5. 6.
7. Again, wBlkSize is received. Set the DSP block transfer size. Send an I /O Programming
3-15
8-bit Mono Auto-initialize Transfer
The following...
Hardware Programming Guide - Page 48
... sends an DSP interrupt, the following are the steps needed to 4KB. Again, wBlkSize is one less than the actual transfer size. 8. Set up the DSP interrupt service routine.
Set the DSP block transfer size. outp(wSBCBaseAddx+0xC, bCommand)
bCommand is one of every 4KB transfer, the DSP will generate an interrupt to...
Hardware Programming Guide - Page 55
... and mono or stereo PCM single-cycle DMA mode transfer on DSP version 4.xx: 1. 2. 3. Set the DSP transfer sampling rate.
Program the DMA controller for 8-bit or 16-bit single-cycle DMA ...Digitized Sound I /O command, followed by the transfer mode, and the data transfer count. Set up the DSP interrupt service routine.
Send an I /O Programming
8-bit or 16-bit Single-cycle Transfer
The following ...
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