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tanam1972

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Posts posted by tanam1972

  5. Posted

    That game DoorDoor looks quite fun. Would be interesting to see how it compares to the MSX version.

    Many of the Tutor games are rather of poor quality, but this one might look worth converting to the TI-99/4A.

     

    Could you do a short video on DoorDoor? Would be a primer as I havent found any Youtube video of this game in the Tutor version.

     

    • Like 6

  6. Posted

    Now I have a question are there differents versions for Tutor, Pyuuta, jr and mk2 or are they all the same?

    I suppose keyboard processing is different between Tutor and Pyuuta jr.

     

    US TUTOR == JP mk2 : BIOS is same hash. And they need magic number to boot 32K cart. Pyuuta and Jr don't need.

    5344 BYTE >00,>02,>20,>34

     

    Pyuuta Jr has parallel joypad. I've wrote 2 codes for scanning joypad. Please check bellow.

    http://d.hatena.ne.jp/tanam/20170305/1488681650

    • Like 1

  7. Posted

    This is very interesting work. A few years ago I started doing a Tutor version of Pitfall but got sidetracked.

    I remember that at the time the biggest problem was debugging. I used Mame (or was it Mess) for emulation at the time, guess that the debugger has improved a lot by now.

     

    Basically there should be many TI-99/4a games that can be converted for Tomy Tutor and Pyuata. Especially the ones were there is assembly source code available, run from ROM and only use scratchpad. Having said that TI-Invaders and Munchman should also be good candidates and perhaps a few of the shortn sweet machine code games.

     

    TMS9995 is faster than TMS9900, I wrote NOP before accessing VDP. And I've made PITFALL! debug version.

    http://www.geocities.jp/parallel_computer_inc/pitfalldbg.zip

     

    I think so too. If TI's source code is available, then it's not difficult converting TI to TUTOR ; )

    • Like 1

  12. Posted

    Oh, sorry to hear that it is freezing. I wouldn't think that the Pyuuta is slower than the TI-99/4A. I don't know though. We have another computer, the Geneve 9640 that uses the 9995 processor. I think, by default that uses the processor's built in wait state generation and is still a few times faster than the 4A.

    I haven't looked at if the Pyuuta uses the wait state on or off. But even on, I would expect it to be faster. The Pyuuta runs the CPU at a lower clock speed too (10.??Mhz / 4), though. If the 9995 was at full speed using a 12Mhz crystal with 1 wait state, it would be about 25% faster than a 9900 with no waitstates. (At least that is what I infer from timings on Stuart Conner's website regarding these CPUs outside of the confines of these computer systems. However, in the 4A, we have severe wait states. So the 4A should be a lot slower.

     

    The 9918 VDP has some kind of overrun issue. Could this be a case of the the CPU overrunning the VDP? I never read anything about what the symptoms are for that overrun issue. Maybe some of our experts here can rule that out?

     

    --

     

    Also, how have you configured your ROM to test on real hardware? I'd love to know. I want to recreate the Japanese cartridge adapter for the back of my US Tutor, and also be able to recreate cartridges.

    I would guess that /CS ROM1 is high by default, and so you have it controlling the most significant address bit on a 32k x 8 eprom. So eprom offsets >0000 to >3FFF are in the beginning of the eprom and only visible when /CS ROM1 goes LOW.

    Is that correct? I don't own any 32k cartridges, so I'm just speculating based on the cartridge port pinouts :)

     

    [email protected]

     

    pyuuta cartridge pin out

    http://www43.tok2.com/home/cmpslv/PyuutaJR/EnrPtj.htm

     

    pyuuta emulator

    http://takeda-toshiya.my.coocan.jp/pyuta/index.html

     

    I've made 8k cartridge with KiCad

    http://www.geocities.jp/parallel_computer_inc/cart.html

     

    And I've made RAM & ROM cartridge, too. It also can run 32k cartride.

    http://d.hatena.ne.jp/tanam/20170304/1488595954

     

    Thanks

    • Like 2

  14. Posted

    I'm a little PyuTa hungry, forgive me. :)

     

    In the emulator linked to with the modified source and pitfall.bin, you have to drop in the operating system roms for the Tutor, and name the file IPL.ROM

    The version 2.3 ROM doesn't work with the pitfall game, but the original Japanese ROM does.

     

    Tutor arrow keys don't equal joystick, a usb pc joystick works with the emulator. This doesn't look like an emulator I have seen before?

     

    [email protected]

     

    Thanks a lot! You've understood everythig. But real pyuuta is freezing in title. I think pyuuta is slower than ti-99/4a. Mmm.

  15. Posted

    Congratulations! This is so cool. Would love to see a video of that. Did you need to do a lot of changes?

     

    Sorry, it's running only on emulaters now. Maybe pyuuta is slower than ti-99/4a. The source and binary are uploded on my website. it takes just one day to convert.

     

    Thanks

    • Like 1
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