fabrizio Posted February 5, 2019 Share Posted February 5, 2019 hello everyone and congratulations for the great information, especially from the GURU ! I'm looking for someone who has put the TM990 / 189 microcomputer into operation with the FW university basic. Quote Link to comment Share on other sites More sharing options...
+Ksarul Posted February 5, 2019 Share Posted February 5, 2019 You may want to talk to Urbite, as I think he has one. I haven't had the time to set mine up to test it yet (I bought a NOS unit early last year), so I can't help too much. Quote Link to comment Share on other sites More sharing options...
fabrizio Posted February 5, 2019 Author Share Posted February 5, 2019 ok thanks, I followed the instructions of the databook, with the original or copied eprom works, with the dedicated fw the micro remains locked. Quote Link to comment Share on other sites More sharing options...
fabrizio Posted February 8, 2019 Author Share Posted February 8, 2019 nobody has the FW for the eprom u32 and u33 ! Quote Link to comment Share on other sites More sharing options...
fabrizio Posted February 11, 2019 Author Share Posted February 11, 2019 (edited) updating in internet the FWs are the correct checksum for U32 = 7546 (tms2716) and U33 = D806 (tms2532). for programming the U33 (tms2532) with willem or tl866 like (tms2732), an adapter must be used to make the pins compatible, in this way. u33 adapter tms 2532 tms 2732 21 vpp 20 20 cs 18 19 a10 19 18 a11 21 for the U32 attention because it has three power supplies (+5, -5, +12) you can use a D2716 (5 volt power supply) by modifying the PCB or using an adapter u32 adapter tms2716 (-5 volt) D2716 ( 5 volt ) 19 vdd 19 n.c. 21 vbb 21 connect +5 20 a10 19 20 connect gnd Edited February 11, 2019 by fabrizio 3 Quote Link to comment Share on other sites More sharing options...
apersson850 Posted February 11, 2019 Share Posted February 11, 2019 I like the idea of using the housing of the TI-59 calculator as a terminal to the board. 1 Quote Link to comment Share on other sites More sharing options...
humeur Posted February 11, 2019 Share Posted February 11, 2019 I'm glad you found the eprom files, I'm watching tonight and I have these eproms with my card. jean louis 1 Quote Link to comment Share on other sites More sharing options...
fabrizio Posted February 13, 2019 Author Share Posted February 13, 2019 I like the idea of using the housing of the TI-59 calculator as a terminal to the board. a real ti59 is not used, but it is the tms9901 outputs that drive the display and manage the keyboard in multiplex... Quote Link to comment Share on other sites More sharing options...
apersson850 Posted February 14, 2019 Share Posted February 14, 2019 Yes, I know, but it's the housing of the calculator. 1 Quote Link to comment Share on other sites More sharing options...
fabrizio Posted February 18, 2019 Author Share Posted February 18, 2019 Yes, I know, but it's the housing of the calculator. I'm sorry I did not understand the word "housing" ! Quote Link to comment Share on other sites More sharing options...
per Posted December 17, 2019 Share Posted December 17, 2019 I recently got one of these, and burned a chip with both firmwares, selectable by a switch. See my Twitter-post here for a picture. I used a pair of 27c64, which are easier to come by and also needs relatively little modification to work with the board once programmed: In both cases: Pin 1, 2, 26, 27 and 28, all at the end of the chip, should be soldered together. For dual firmware, pin 2 should be connected to a switch going to VCC and GND instead. Adaption to U32: Pin 21 needs to be lifted and goes to the socket under pin 22. Pin 22 needs to be lifted and soldered to pin 20. Pin 23 needs to be lifted and soldered to pin 26 (and the other pins nr 26 is connected to). Adaption to U33: pin 20 needs to be lifted and soldered to pin 22. pin 23 needs to be lifted and goes to the socket under pin 20. Pin 1, 2, 27, and 28 should hang outside the socket on the PCB. If using U32 like this, E39-E40 and E41-E42 needs to be jumpered. This might involve cutting some PCB-jumpers first. If using both U32 and U33, E49-E50 also needs a jumper. 4 Quote Link to comment Share on other sites More sharing options...
apersson850 Posted December 19, 2019 Share Posted December 19, 2019 On 2/18/2019 at 10:49 AM, fabrizio said: I'm sorry I did not understand the word "housing" ! I was referring to that the case for the "terminal" on the TM990/189 is the same case as was used by the TI 59 calculator. 1 Quote Link to comment Share on other sites More sharing options...
Subotai Posted January 24, 2020 Share Posted January 24, 2020 @perhey dude, saw some old post somewhere where you mention you were writing up schematics for the original NES Advantage joystick PCB. I’m very interested in that. Can you email me any info you have on it? Thanks: muscoymike@yahoo.com Quote Link to comment Share on other sites More sharing options...
fabrizio Posted December 28, 2020 Author Share Posted December 28, 2020 On 19/12/2019 at 17:36, apersson850 said: Mi riferivo al fatto che la custodia per il "terminale" sul TM990 / 189 è la stessa custodia utilizzata dalla calcolatrice TI 59. Ok 1 Quote Link to comment Share on other sites More sharing options...
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