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Powertran Cortex

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    when I first built mine it had the display too far to the left...

    are you on a RGB set up or the modulator ?

    Comment


      Mine hasn't got a composite/rgb output (it has a hole in the case for a din socket, but nowhere on the board (or the schematic even!)for it to connect to) purely a modulated output.
      you say "when you first built it the display was too far to the left", did you correct this? it looks like it could be firmware correctable.
      "Don't it always seem to go
      That you don't know what you’ve got ‘til it’s gone" (BANG )

      Comment


        It's a long time ago but I remember taking the video connection from the input of the modulator and using this for composite to a TV...I think I used a couple of transistor stages to buffer it and drive it.

        Some where i thnk i have the user group news letter with the "official" RGB interface and maybe even a copper diagram for the board...Will have a look next weekend.

        Comment


          Anyone still here?

          Stumbled across this: the display being too far to the left - a design fault with the European VDP it seems. See:

          <http://spatula-city.org/~im14u2c/vdp-99xx/e3/1982_TI_Europe_Proposal_for_9929A_Improvements_(in c._External_Video).pdf>

          Section 3.1, para 2, on page 6 of the PDF.

          (Many of the docs at <http://spatula-city.org/~im14u2c/vdp-99xx/> make interesting reading.

          Stuart.

          Comment


            In the above link, remove the space near the end between "(in" and "c._External".

            Stuart.

            Comment


              We are still alive, just even more busy than before.
              very interesting - so there's nothing to be done except attack the chip with a dremel & an ion beam!
              Thanks stuart.
              "Don't it always seem to go
              That you don't know what you’ve got ‘til it’s gone" (BANG )

              Comment


                74ls2001

                I have been gifted with a nearly-complete copy of the preliminary data sheet for the 74LS2001 which I am in the midst of turning into a fully-functional document (much like I did for the Forth and BASIC manuals). There will be a few missing words here and there as the copy I received was missing a narrow strip at the end of each line of text. Sometimes it is easy to reconstruct a line, but there are instances where there is no clue as to what the missing text was.

                One major advantage: the timing diagrams and the pin out are complete, so with what we already knew and the contents of this document, it should be possible to code a replacement for it.
                Enter My Mind At Your Own Risk!

                Comment


                  Marinchip M9900

                  Originally posted by Ksarul View Post
                  TMS9995, one of your earlier comments reminded me of something I haven't thought of in ages. Marinchip Systems also built a TMS9900 board for the S-100 bus. I was looking for one of those for a long time but never did encounter anyone who'd ever heard of it or them. Thanks for the reminder. . .one more vintage 9900-family system for me to track down.
                  I have a Marinchip M9900 S100 box - It's a huge Integrand chassis with M9900, 64k/128k RAM and two DS/DD 8 inch floppies. There's even the original manual somewhere. There are boxes and boxes of floppies for it. This is the machine used for the port of MDEX to the Powertran Cortex. There's also a Cortex and a Scandinavian industrial version of the Cortex. MDEX's big brother NOS was ported to this as far as I remember.

                  These machines all worked when last powered up. If someone wants them - just ask.

                  Stephen

                  Comment


                    Originally posted by spelc View Post
                    I have a Marinchip M9900 S100 box - It's a huge Integrand chassis with M9900, 64k/128k RAM and two DS/DD 8 inch floppies. There's even the original manual somewhere. There are boxes and boxes of floppies for it. This is the machine used for the port of MDEX to the Powertran Cortex. There's also a Cortex and a Scandinavian industrial version of the Cortex. MDEX's big brother NOS was ported to this as far as I remember.

                    These machines all worked when last powered up. If someone wants them - just ask.

                    Stephen
                    Er yes, I'd love to get my hands on that gear! I believe I remember you (along with Richard Roberts) from MPE?

                    Comment


                      I'd love the Cortex ... and live in Southampton.

                      Stuart.

                      Comment


                        Originally posted by Stuart View Post
                        I'd love the Cortex ... and live in Southampton.

                        Stuart.
                        Fine by me. I have two already More interested in the other stuff. If I find it doesn't have a lot more to contribute to the Cortex 'preservation project', I'll give it to Ksarul since he has a real TI fetish...

                        I'm hoping to have some news regarding building the Cortex ROM from source very soon...

                        Comment


                          Originally posted by tms9995 View Post
                          Fine by me. I have two already More interested in the other stuff. If I find it doesn't have a lot more to contribute to the Cortex 'preservation project', I'll give it to Ksarul since he has a real TI fetish...
                          I'll take the 'industrial' Cortex as well if there are no other takers. I know another chap in the UK who will probably bite my arm off to get it and put it to good use.

                          Stuart.

                          Comment


                            Comment


                              Originally posted by spelc View Post
                              I have a Marinchip M9900 S100 box
                              I'm running seriously short on space but..... Wasn't that the original Autocad machine? If Ksarul can't take it, and you're not TOO far away, and you want it gone, then can you put me on the list please!
                              "Don't it always seem to go
                              That you don't know what you’ve got ‘til it’s gone" (BANG )

                              Comment


                                Originally posted by tms9995 View Post
                                I'm hoping to have some news regarding building the Cortex ROM from source very soon...
                                If you're rebuilding the code, what do you make of this? VDPDSR module, page 10, last line in the 'TEXT MODE' block - JHE FTMODE. Shouldn't that be a JL REMCUR jump (to the following block) followed by a BLWP @FTMODE since FTMODE comprises a WP pointer and PC pointer? [I'm working on porting the code across to my TM990 9900-based system so have been looking quite closely at it.]

                                Stuart.

                                (tms9995 - also sent you a PM)

                                Comment

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