As our machines pass the 40 year mark, what preventative maintenance do you do for them? I'm pulling my machine out of storage and am planning on replacing the thermal paste on the VDP. I assume it's eventually due a recap. Is there anything else I should do?

Today at our monthly Vintage Computer Club meeting at Indiana we all chose TI Invaders as the best version of the game across multiple platforms. Competed against Commodore, Vectrex, Famicon, Amiga, IBM Compatibles, CoCo, and couple of modern arcade reproductions. We had lotta fun.

Do they both basically get the job done or is there a reason to favor one or the other?

Desperately seeking monitor.

What is a good replacement screw for the ti994a computer shell and where is good place to get them online or in store. Any help be greatly appreciated.

Hello hive mind. I’m a relatively novice TI user getting back into it from my childhood. I have the computer, which works and has been tested on both a Commodore monitor and a modern TV with RCA inputs with no issues. However, I’d like to use it on a Sony Trinitron monitor that I’ve had for years, but get bad video when I plug it in. Attached is a pic of the behavior (this pattern scrolls very fast, it isn’t stationary). I have it plugged into the video A port on the back of the monitor with a 6DIN to RCA plug specifically for the TI, running into a BNC adapter (which worked previously with and Apple IIe and the Commodore). No amount of adjusting the horizontal or vertical holds, or any of the front controls, will solve it. The sound works and I see the video changing (like scrambled HBO back in the day), but cannot get anywhere with it. Anyone have any ideas? Thank you so much for any potential help.

I am getting a parts ti994a from ebay sold for part for $30 including shipping. Where can i get a replacwent power switch to beable to turn on the computer or is therd a way to male a makeshift switch to turn the internal switch on. Any good or diy method be grearly appreciated.

Found these at a local 2nd and Charles. $4 to $5 each cant wait to try them but i hear i need a cassette for tunnels of doom dont know what to do for that game.

When I was a kid I played a LOT of PARSEC. I discovered a "warp" function back when I was playing. From what I recall you need to fire your weapon when you are above the enemy you want to warp to, then destroy the last enemy of the first wave when above another specific scenery item. I think it was the TI logo. Or it could be the opposite. It has been a long time! The next enemy wave would then be what you "selected". If you did the killer satellites (which only appear on level 4) you would warp to level 4. I presume this was some sort of debugging/test function. Figuring this out took many many many plays of Parsec!

Did anyone else every discover this? I can't find any record of this online anywhere. I noticed you can even find the assembly source of PARSEC online (complete with comments) but I don't see this obviously in there.

Howdy! I recently picked up a TI-99/4A from a deceased relative, and it came with a shoebox of programs. I've got the machine all up and running, but the cassettes are all labeled VIC-20. I'm new to all this, but a quick search leads me to believe these are for a Commodore system. Are these compatible at all with the TI-99/4A? I just can't think of why they'd be shoved in the same box.

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?