Regarding Jeff’s comment: “TSDOS does its own thing, like John says, and really makes a mess of it.”:
Could it be that TSDOS got away with it due to inherent delays in reading data from a disk? Reading from an SD card should be much faster and not have those delays. Just speculating… Lloyd From: M100 <[email protected]> On Behalf Of Peter Vollan Sent: Wednesday, March 1, 2023 2:13 PM To: [email protected] Subject: Re: [M100] - Backpack See, I take the unpopular opinion that that should not be done because it teaches bad habits. On Wed, 1 Mar 2023 at 06:20, <[email protected] <mailto:[email protected]> > wrote: I also tried loading a .DO named as .BA through BASIC, i.e. load "com:98n1e" and that worked fine. Seems to me that if it were a man ROM issue the same problem would happen this way. Also, the TS-DOS disassembly shows that it changes it’s behavior based on filetype extension. Jeff Birt From: M100 <[email protected] <mailto:[email protected]> > On Behalf Of Brian White Sent: Wednesday, March 1, 2023 6:51 AM To: [email protected] <mailto:[email protected]> Subject: Re: [M100] - Backpack I don't think it's ts-dos, it's the main rom. The main rom and all the tpdd clients basically have to trust the file name. If it's declared as a .ba, then the bytes are copied verbatim and then later interpreted according to the rules of parsing a .ba. If the contents are not .ba, kablooey. bkw On Tue, Feb 28, 2023, 8:11 PM <[email protected] <mailto:[email protected]> > wrote: I did some more testing and discovered that John is absolutely correct. Previously when I had tried to load a .BA which was really a .DO it made it about 3-4 line in and then stopped. This led me to believe it was an issue I have seen on other computer; when loading an ASCII file over serial the computer will tokenize the line when the CR is encountered. Just like it had been typed in on the keyboard. For these systems you have to add a 2 second or so delay after each line to allow for tokenization. TSDOS does its own thing, like John says, and really makes a mess of it. Jeff Birt From: M100 <[email protected] <mailto:[email protected]> > On Behalf Of John R. Hogerhuis Sent: Saturday, February 25, 2023 7:40 PM To: [email protected] <mailto:[email protected]> Subject: Re: [M100] - Backpack A side note but the reason files misnamed as BA cause a problem is that tsdos will load them into the BASIC program region verbatim and treat the ASCII bytes as parts of binary formatted line numbers and tokens among other problems, ultimately causing a corrupted RAM file system. It was the convention on the old Club100 library to name them this way but it's now a bad practice. -- John. On Sat, Feb 25, 2023, 5:30 PM <[email protected] <mailto:[email protected]> > wrote: Yes, someone already wrote such a program and shared it. If you just got a Backpack Drive Plus it is already on the SD card. You can also download it from: https://github.com/Jeff-Birt/Backpack/tree/main/User_Programs
