This is my first post (sorry about the length) in these forums, though I've browsed through them in wonderment over the last couple weeks. I'm really hoping someone can remember enough about developing on these old platforms that they can help me.
I'll start from the top. I was back East to visit my Mom and Dad a couple weeks ago and the topic of the old TI99/4a came up. My Dad built and sold a game for the 99/4a back in 1983. It ran on a 5.25" floppy with the TI Extended Basic cart installed. He happened to find one of the old disks that was in mint condition. I mailed it over to David at RetroFloppy and he made me an image. I loaded it into the JS99er Java based emulator and IT LOADED!!! That's where my luck started running out. It ran through the first 40 or so lines of code and it crashed with an I/O Error 33 at line 480. So, I called my stepmom and had her dig out my Dad's old project binder that he's saved since the 80's. Low and behold, line 480 as he originally programmed it (see attached).
My initial thought was that the program was trying to call back to the disk itself and there might be some sort of naming issue. I can't remember enough from BASIC to make heads or tails of the code. Further, its likely calling some other line of code that I don't have (but could likely get). JS99er is the only emulator I have tried it on so far.
I've attached a screen shot of the screen right before it crashes (once you type "1"), as well as the .dsk file, and a picture of that line 480.
I'm really hoping someone might have a solution for me. Is it possible that another emulator (i.e. - TI99sim) might resolve the issue? I'm positive this game ran on the original system when I was a kid. I'd like nothing more than to get this thing working and load it into a raspberry pi to give to my Dad for Christmas.
If anyone has any ideas at all, please share them. Or, if you know someone I can contact that maybe could/would take a deeper dive I would be so appreciative. Thank you all in advance!
EDIT: Forgot to attach the disk image
Mike
AZTEC.DSK