Cyprian Posted August 6, 2021 Share Posted August 6, 2021 On 8/5/2021 at 6:03 PM, Chri O. said: Apparently not in Falcon TOS at least for SDMA and SCSI controller. LINK: Atari Falcon030 Service Guide October 1, 1992. The dma controller is set up to select the source and the number of 512 byte block to transfer, and then the FDC or external peripheral (SCSI) is given the command to send or receive data. The entire block of data is then transferred to or from memory without intervention by the CPU (PAGE 20). the same as the DMA (used by the FDC and FDD) in the ST. Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 6, 2021 Share Posted August 6, 2021 Okay so ATARI spend thousands of dollars designing and engineering SDMA just so the CPU can take a break in a while() loop waiting for whatever is happening around OK. So the eight audio tracks is well within the capability of programs like Cubase Audio and Logic Audio. ? Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 6, 2021 Share Posted August 6, 2021 (edited) 6 hours ago, Cyprian said: the same as the DMA (used by the FDC and FDD) in the ST. ATARI ST/STe has only one channel DMA IC. ATARI Falcon has three channels on SDMA IC. My favorite Teens 4.1 microcontroller has 32 generic dma channels. Edited August 6, 2021 by Chri O. Teens 4.1 Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 7, 2021 Share Posted August 7, 2021 (edited) Okay it's too freaking quiet here, anyways whoever designed this was genius ? Edited August 7, 2021 by Chri O. Quote Link to comment Share on other sites More sharing options...
as... Posted August 7, 2021 Share Posted August 7, 2021 Falcon, clab with ct6X with rev 060 six. This is good.. Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 7, 2021 Share Posted August 7, 2021 (edited) U AS... I need that too, is . for sale? ? MOZESZ TO SPRZEDAC ? Edited August 7, 2021 by Chri O. PL Grammar Quote Link to comment Share on other sites More sharing options...
Cyprian Posted August 7, 2021 Share Posted August 7, 2021 10 hours ago, Chri O. said: ATARI ST/STe has only one channel DMA IC. ATARI Falcon has three channels on SDMA IC. My favorite Teens 4.1 microcontroller has 32 generic dma channels. SDMA means Sound DMA, therefore please do not mix SDMA with HDD/FDD DMA, they are different things. There are more than one DMA device/channel in the Atari: 1) ACSI/HDD/FDD (and SCSI in the Falcon) ; 2) Video; 3) Memory Refresh; 4) the BLiTTER (two channels); 5) SCSI in the TT; 6) SDMA - Playback sound DMA (the STE/TT); 7) SDMA - Record sound DMA in the Falcon. 11 hours ago, Chri O. said: Okay so ATARI spend thousands of dollars designing and engineering SDMA just so the CPU can take a break in a while() loop waiting for whatever is happening around OK. So the eight audio tracks is well within the capability of programs like Cubase Audio and Logic Audio. ? there is no need to use "while() loop" because they all interrupt driven (besides Memory Refresh). Many application/demos uses them. But the TOS uses "while() loop" for disk access (ACSI/HDD/FDD/SCSI) Quote Link to comment Share on other sites More sharing options...
calimero Posted August 7, 2021 Share Posted August 7, 2021 5 hours ago, Cyprian said: SDMA means Sound DMA, therefore please do not mix SDMA with HDD/FDD DMA, they are different things. Different things handled by same IC called SDMA in Falcon. Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 7, 2021 Share Posted August 7, 2021 10 hours ago, Cyprian said: SDMA means Sound DMA, therefore please do not mix SDMA with HDD/FDD DMA, they are different things. Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 7, 2021 Share Posted August 7, 2021 Guess what I found in the Falcon schematics. Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 8, 2021 Share Posted August 8, 2021 Fun fact about Atari falcon 030 AJAX floppy Drive controller. From reading various sources looks like it can actually support 2.88 MB Double-Sided Extended-Density (DSED) diskettes of course with 2.88 MB floppy Drive. Interesting. Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 8, 2021 Share Posted August 8, 2021 Sorry but I just can't stop. Now I am reading about Falcon L53C80 SCSI Bus Controller. FEATURES: Asynchronous Transfer Rate Up to 4 Mbytes/sec. So I am wondering what's the slow down on the Falcon that some people are claiming (1.5MB ?) perhaps the bus speed. Quote Link to comment Share on other sites More sharing options...
+DarkLord Posted August 8, 2021 Share Posted August 8, 2021 1 hour ago, Chri O. said: Fun fact about Atari falcon 030 AJAX floppy Drive controller. From reading various sources looks like it can actually support 2.88 MB Double-Sided Extended-Density (DSED) diskettes of course with 2.88 MB floppy Drive. Interesting. Remember reading this from early on in the Falcon's release... Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 8, 2021 Share Posted August 8, 2021 20 minutes ago, DarkLord said: Remember reading this from early on in the Falcon's release... Yeah it's interesting to me because I modified my Atari 1040 STe about 30 years ago and still to this day I am able to read 720K and 1.44Mb floppies, of course I can't format a new floppy disk in 1.44Mb (rainbow TOS 1.62 does not have support for it), I use my Falcon for formatting new floppy drives in 1.44Mb. ? Quote Link to comment Share on other sites More sharing options...
calimero Posted August 8, 2021 Share Posted August 8, 2021 E-copy had support for ED (2.88MB) floppy disks... http://milan.kovac.cc/atari/software/?folder=/DISKTOOL/_DISKCOPY Quote Link to comment Share on other sites More sharing options...
Chri O. Posted August 8, 2021 Share Posted August 8, 2021 2 minutes ago, calimero said: E-copy had support for ED (2.88MB) floppy disks... Oo0 interesting. Quote Link to comment Share on other sites More sharing options...
Cyprian Posted August 12, 2021 Share Posted August 12, 2021 On 8/7/2021 at 5:43 PM, calimero said: Different things handled by same IC called SDMA in Falcon. ok I see it now - the Falcon's SDMA chip vs SDMA (Sound DMA abbreviation) Quote Link to comment Share on other sites More sharing options...
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.