midi interface for Ti994A

[Astharot]

Hello every one, reading old post i found an article for use a midi interface with Ti994A. Looking the program seem project for only midi out..(from ti to music expander at example). I like look that Bruce Harrison had create or upgrade 2 midi program. One is midi master99 that i found here on atari age. Other program that i search is midi play-in, that i found in old meeting video. The interface i no found info, then i try at build an rs232 to midi that have all midi in,out,and trust. For test i need the program that interface a ti with music keyboard . How i built a prototipe i show here with electronic scheme. Thanks at all for help can give me. Ermanno

[Sinphaltimus]

Not sure if this is what you're looking for.

http://atariage.com/forums/topic/240729-midi-module-or-synthesizer-connected-to-the-ti-994a/

[Astharot]

Thanks Sinphaltimus,

i start my project reading the post that you link up.

Reading the post i found the name of program good for use a midi interface. Midi master99 that disk is present in post and "Midi Play in" created from Bruce Harrison that no found.. Midi master is good for connect ti99 at expander midi, midi play in for connect a music keyborad to ti99. The interface is no only connect 3 wires.. and looking standard midi pin the scheme in post i do no believe is correct.. missed more signal.. sure from rs232 you no use pin1 but pin 2-3 and 7. They are tx,rx and gnd. After is better translate rs232 signal in ttl and after send to midi machine.. keyboard,expander etc..

An old project of midi interface maybe i found, just need built and adapted for ti99. But for test if this midi interface is good i need the input midi program. However first i built prototipe, show electric scheme, try at use how midi out using midi master99 and after try midi in..

[+Lee Stewart]

Thanks Sinphaltimus,

i start my project reading the post that you link up.

Reading the post i found the name of program good for use a midi interface. Midi master99 that disk is present in post and "Midi Play in" created from Bruce Harrison that no found.. Midi master is good for connect ti99 at expander midi, midi play in for connect a music keyborad to ti99. The interface is no only connect 3 wires.. and looking standard midi pin the scheme in post i do no believe is correct.. missed more signal.. sure from rs232 you no use pin1 but pin 2-3 and 7. They are tx,rx and gnd. After is better translate rs232 signal in ttl and after send to midi machine.. keyboard,expander etc..

An old project of midi interface maybe i found, just need built and adapted for ti99. But for test if this midi interface is good i need the input midi program. However first i built prototipe, show electric scheme, try at use how midi out using midi master99 and after try midi in..

 

MIDI Master99 only handles MIDI Out. That is why pin 2 is not connected on the TI-99/4A’s RS232 port.

 

...lee

[Swim]

The latest midi master 99 files including play in can be found on the Hidden Reef BBS 1-718-448-9402. My wife and I were the testers for Bruce on the Midi Master 99 project. I also have the source code but that would take a bit to dig out and I don't have time right now but eventually I plan to add it to the Hidden Reef BBS downloads. Bruce did some amazing work with these programs and created some nice tools that made it much easier to publish music. Unfortunately, Bruce passed on before he was finished with Play-in but it works fine for all but the most virtuoso serious music. In addition the SAMS card allows very large symphony pieces to be played on the TI. The cable I use is the latest design from Mike Maksimik that cured a "ground loop" problem when using Yamaha midi keyboards. I will try to add the picture of the cable pin outs here when time allows me to dig it out of one of the piles around here.

[+arcadeshopper]

The latest midi master 99 files including play in can be found on the Hidden Reef BBS 1-718-448-9402. My wife and I were the testers for Bruce on the Midi Master 99 project. I also have the source code but that would take a bit to dig out and I don't have time right now but eventually I plan to add it to the Hidden Reef BBS downloads. Bruce did some amazing work with these programs and created some nice tools that made it much easier to publish music. Unfortunately, Bruce passed on before he was finished with Play-in but it works fine for all but the most virtuoso serious music. In addition the SAMS card allows very large symphony pieces to be played on the TI. The cable I use is the latest design from Mike Maksimik that cured a "ground loop" problem when using Yamaha midi keyboards. I will try to add the picture of the cable pin outs here when time allows me to dig it out of one of the piles around here.

 

Richard,

 

Would love to see the cable info.. I only have the ones that Tony posted earlier which seem simple

 

Greg

[+arcadeshopper]

Btw I found Tim's diagram in the other thread

 

Sent from my LG-H830 using Tapatalk

[Swim]

Will try to get it here. I think I have a DV80 file that shows the cable on the BBS. It may be in with the latest midi master 99 ARC file.

[+arcadeshopper]

Will try to get it here. I think I have a DV80 file that shows the cable on the BBS. It may be in with the latest midi master 99 ARC file.

I will check the arc

 

 

Sent from my LG-H830 using Tapatalk

[+InsaneMultitasker]

I was in the process of testing the midi-in connection for the nanopeb cable. Now that I think of it, I am not sure where that even disappeared to or what I did with the modified input program. All sort of a blank to me at the moment... I'll have to poke around the boxes for anything that looks familiar.

[NewcomerTI]

My TI99 MIDI master plays out on my musical equipment from a HRD4000B. I can either load music files from the Album using the Mini Memory cart or directly from the Midi Master program.  Loading from RAM certainly makes a difference in switching to the next song, speaking of which if anyone has the play in program can you provide a copy or if it is available for purchase I’d like a copy. Hidden Reef still doesn’t have the files available for download yet. 

Thank you,

Ray Mihalko

 

 

[+arcadeshopper]

On 11/9/2017 at 8:54 PM, InsaneMultitasker said:

I was in the process of testing the midi-in connection for the nanopeb cable. Now that I think of it, I am not sure where that even disappeared to or what I did with the modified input program. All sort of a blank to me at the moment... I'll have to poke around the boxes for anything that looks familiar.

Did you ever find this?

 

Greg

[Artoj]

Hi Ray,

 

I have been working on a couple of MIDI circuits and still haven't settled on which design would be better to use. Is your MIDI Master a PEB card or ?, regards Arto.  

[+arcadeshopper]

26 minutes ago, Artoj said:

Hi Ray,

 

I have been working on a couple of MIDI circuits and still haven't settled on which design would be better to use. Is your MIDI Master a PEB card or ?, regards Arto.  

its software and the ti rs232

[+InsaneMultitasker]

1 hour ago, arcadeshopper said:

Did you ever find this?

 

Greg

I do not see anything in my typical working folders and no disks that suggest I have the files.  Alas, I do not recall working on any MIDI items; the year or two after my surgeries contain sketchy memories when it comes to hobby-related activities. 

[Artoj]

Thanks Greg, so it is a conversion cable that uses the RS232 (TMS9902 chips) and configure it as a Midi in the software, I designed a MIDI port back in 1986 from Peter Schubert's MiniPEB RS232, which had the 'MIDI' already configured in the DSR, this is already on one of my current designs. It might be more direct to create a dedicated MIDI port and see if we can add the DSR into a GROMY chip, there are a few spare CRU lines that can easily reconfigured, if that was the case, it might be prudent to add a I2C and a SPI port as well these would make it much easier to interface a lot of current modules. Maybe a small board with ports at the back, inside the console? Regards Arto.

[+arcadeshopper]

49 minutes ago, Artoj said:

Thanks Greg, so it is a conversion cable that uses the RS232 (TMS9902 chips) and configure it as a Midi in the software, I designed a MIDI port back in 1986 from Peter Schubert's MiniPEB RS232, which had the 'MIDI' already configured in the DSR, this is already on one of my current designs. It might be more direct to create a dedicated MIDI port and see if we can add the DSR into a GROMY chip, there are a few spare CRU lines that can easily reconfigured, if that was the case, it might be prudent to add a I2C and a SPI port as well these would make it much easier to interface a lot of current modules. Maybe a small board with ports at the back, inside the console? Regards Arto.

DSR is usually ROM don't need grommy for ROM

[Artoj]

Greg, the plan would be to include these routines into the TI Basic console while giving you added Basic commands, such as CALL MIDI(IN,DATA) and CALL I2C(OUT, DATA) and CALL SPI(IN, DATA) etc.... 

So instead of a lumpy circuit with a DSR ROM and all the interface chips required to make these things to work via the buses, you can use a few spare CRU lines (P0 P1 P10) from the TMS9901 and add the GPL Device Service Routines into a modified GROMY, I will suggest this to Speccery, regards Arto.