Understood, thx, another question. is it normal, that LaddieAlpha started with mono runtime brings this message:
WARNING: The runtime version supported by this application is unavailable. Using default runtime: v4.0.30319 ======================================================================= ========= LaddieAlpha Tandy Portable Disk Drive Emulator (Speaker To Machines, Inc.) Built : 04/03/2020 02:12:12 File Version : 2.1.0.0 Version : 2.1.0.0 Copyright : Copyright © Speaker To Machines, Inc. 2014 Working Dir : /home/explit/Downloads ======================================================================= ========= Opening /dev/ttyUSB0 Is the default runtime 4.0.30319 ok to work ? or should i change something? Thanks -- Kind regards / Mit freundlichen Grüßen ExPLIT IT Solutions Pawel Radomychelski -----Original Message----- From: John R. Hogerhuis <jho...@pobox.com> Reply-To: m...@bitchin100.com To: m...@bitchin100.com Subject: Re: [M100] Transferring ROM to REX# over DeskLink+ and USB2SERIAL hangs Date: Fri, 9 Jul 2021 18:25:28 -0700 On Fri, Jul 9, 2021 at 6:14 PM ExPLIT | Pawel Radomychelski <exp...@mailbox.org> wrote: > Thanks John, will try Laddie Alpha > I alos think it has something to do with the size of the file, > because small file transfers over dl+ works normally. > Yes. TPDD directory enumeration include a "file length" encoded as 2 bytes with a range of 0 to 65,535. Binary ROM images are 32K = 32768, which is a length of file that can technically be represented in an unsigned 16-bit integer (2 bytes). It is less than 65,536. But ROM image files as used by REX are a hex representation, so they are twice that big. Each binary byte is represented by 2 ASCII characters encoding the upper and lower nibble of each byte, respectively. Which means those files they are exactly 64K = 65,536 The length of a 64K file cannot be represented in a 16-bit integer. You can only represent file sizes exactly one byte shorter... 65,535. The TPDD protocol actually supports files bigger than 65535 bytes but the protocol is slightly different for representing file lengths greater than 65,535. So IF what I suspect is happening is happening, DLPlus still has that bug. I used to maintain it but I don't remember. Anyway I had to fix this for LaddieAlpha to make hex files work with REX. -- John.
