Hello all! New to this thread but glad you are all here. As my title states, I am experiencing this problem where the drive does not read the drive. It comes and goes. Works, doesn't work. Any thots?

Any insight or help would be most appreciated.

Thanks

The request might make not much sense as I am just looking in the dark.

I am trying to understand how in 1980's Forths worked a command "RP@", so that I can write it in 6502 assembly (Atari 8-bit, please don't hurt me). One of the sources I have is "Forth Dimension Volume 10 Number 2 page 22" where this "word" is defined for TI-FORTH as machine code: 0649 C64E 045F

This "RP@" command would store the return stack pointer somewhere.

Since I am not experienced in any assembly language (just a total beginner in 6502), all the TI994 manuals and cheat sheets look like magic.

If no one has at hand any tools to "disarm" the code I would be grateful for at least pointing to right tools (simplest possible) so that I could do so.

It would greatly help to understand how this was implemented in different architectures.

EDIT: 0649 might be a stack pointer decrease as found in https://oratronik.de/atariage/tiintern_english.pdf

I have a working Greaseweazle with a 360kb 5.25" drive and a 1.4mb 3.5" drive and I can't get a TI-99/4A disk written to save my life. I took a .DSK file and ran it through HxCLoppyEnumalot and exported the file as an .HFE file and then tried to write the file using GW.EXE and these parameters: gw write "F:\Greaseweazle\Tunnels of Doom[QUEST & PENNIES]_dsk.hfe" --tracks="c=0-39:h=0" --drive=1

What am I missing here? Does anyone have a ready-to-write file that I could experiment with? I have a FinalGROM99 but really want to use the drive in my PEB. Thanks,

my stream

I have a game cartridge that is bad, I only get a squeal sound and a blank screen when I insert the cart and turn the system on. Other games/carts work. Any way to reprogram the chip? I have cleaned the contacts and re-soldered all the joints. I'm guessing somehow the chip is corrupted after all these years. the game is parsec. Any help would be appreciated.

I ordered a FinalGrom99 but I would like to have the original game cart working if posable without having to purchase a new one.

So I’m a big fan of this computer and I have a lot of stuff for it but I want to have a disk drive for it. I really don’t want to get the whole big-ass PEB thing I’d rather just use sidecars. The only problem is that I can’t find these things to save my life. Anyone know a place where I could buy one?

I discovered some of my old TI-99 program tapes from the early 1980s. They're probably just BASIC programs I typed in, but I was hoping they were some things I wrote.

I tried and failed to transfer them by capturing to WAV file and converting using one of the WAV to program converters. I was using the headphone out on a Sony tape player I found.

My sense is the tapes are just too noisy or wobbly.

If I got a TI and official tape recorder, do you think I might be able to load them after all?

Hi all,

I'm ttrying use our TI-99 for the first time since around 1985! Been in my dads loft. I bought a din to AV connector which displays an image on my modern TV. The main screen is grey and the game is not listed, only 'for TI basic', with the cartridge in the computer. I've cleaned the cartridges using IPA. Inside where the cartridge slots in does look quite dirty...maybe this needs cleaning too to improve the connection?...however, does that explain why the screen in grey coloured?

Any help would be much appreciated.

Hi all,

I'm ttrying use our TI-99 for the first time since around 1985! Been in my dads loft. I bought a din to AV connector which displays an image on my modern TV. The main screen is grey and the game is not listed, only 'for TI basic', with the cartridge in the computer. I've cleaned the cartridges using IPA. Inside where the cartridge slots in does look quite dirty...maybe this needs cleaning too to improve the connection?...however, does that explain why the screen in grey coloured?

Any help would be much appreciated.

Hi all,

I'm ttrying use our TI-99 for the first time since around 1985! Been in my dads loft. I bought a din to AV connector which displays an image on my modern TV. The main screen is grey and the game is not listed, only 'for TI basic', with the cartridge in the computer. I've cleaned the cartridges using IPA. Inside where the cartridge slots in does look quite dirty...maybe this needs cleaning too to improve the connection?...however, does that explain why the screen in grey coloured?

Any help would be much appreciated.

Wow. I was working on a basic program and i went to add quotes and accidentally pressed =

There goes 6 hours of my life. (If you cant tell im quite upset)

Hi all, I'm not a techi so bare I mind. I've have been reunited with my ti99/4A (live in UK and European version) and want to get it hooked up. Have not got a crt TV so wondering if I can connect to my modern TV?

There are 6-pin din to AV cables available online, do these work? My TV has the AV connections at the back.

There seems to be conflicting info on what works, other articles say you need to get a crt tv without mention the simpler cable option above? Sounds too good to be true?

Advice would be much appreciated.

I’m trying to figure out how to write assembly for the tms9900 because I ordered a ti994a on eBay. I tried using a tutorial by a youtuber named ChibiAkumas, but his tutorial didn’t work for me. Are there any other tutorials about how to assemble code for this computer using a modern windows computer? I like to edit my code on a modern computer, and test it with an emulator. I’m new to this subreddit so if there are any issues with my question I’m sorry ahead of time.

Edit:

I found a good assembler written in Python, I just haven’t been able to load any programs in the classic99 emulator. The disk option is unable to be selected, and any other methods give errors. What kind of file am I supposed to put my program into and how do I load it in the emulator?

usually turning a logo or flag upside down has a negative connotation, which overrides the direction the nether end of texas points:-\ the panhandle points up so why not make it less confusing?

i don't think it should be removed, perhaps just flagged with a slash over his face...

https://preview.redd.it/9d3exs4qastb1.jpg?width=350&format=pjpg&auto=webp&s=59c3a4aff804cd8a12db6dafc6e26c1d0b831f41

I have acquired all the following that work per the seller:

• Base Ti-99 4/a
• Power Supply
• Speech Synth
• DIN to RF Cable (original)
• DIN to 2X RCA cable sold explicitly for the TI (modern)

I have no carts or any of the other accessories.

Back in the day I programmed in Basic with a Cassette, and I would like to mess around on that front in a modern way.

I know there is ROM BASIC, but for the speech and other things, I have looked at extended basic carts online and they run a bit high and aren't super common.

1. Does anyone recommend a HDMI dongle that can take the RCA output? If not, what is the preferred way to get this thing talking to a modern monitor?

2. Every retro computer community has some kind of "X-to-SD" kind of solution for software. How would I get that going here? I am not realistically going to run a cassette in this day and age, I put my time in back in the 80's.

Thanks for any tips!

​

I remember when the TI-99/4A came out. I was 9 years old. My dad was a radar engineer for the US government, and the geek gene has always been strong in our family. We bought one as soon as it came out, along with a voice synthesizer (eventually), a disc drive, and all the things. I remember going to early programming classes at the local VFW with him. I remember endless hours talking about the dawn of the new age of computing. We could FEEL what this was...what it could be. I remember staying up all night long, reading out thousands of lines of code to my brother, line by line, from those early BASIC magazines, while he typed them in. We made our own software that way - games, paint programs, you name it. So many hours of troubleshooting and debugging. So much frustration, but I wouldn't trade it for anything. I bonded so much with my brothers and dad over that silly little machine. My dad playing Hunt the Wumpus for hours at a time. That goofy Dig Dug rip off he loved so much. He's been gone for years now. He was a kind guy with a big heart and a big laugh, and I miss his enthusiasm and his geekiness and his hugs. Those were great days.