BIOS for BASIC screen output is truncating the last few characters

[costarc]

Tested on v1.2
Issue is very evident when followed these steps to reproduce:

1. set current path
   pcd https://www.msxarchive.nl/pub/msx/games/roms/msx1

Note: this will also work if you have not changed the default location in R1:
PCD R1:

2. List the content
   pdir

3. Note that the last line is show as:
   zaxxon.zip 2020-04-22 10:13 | 15K
   zexasltd.lzh 2020-04-22 10:13 | 19K
   zoom909.lzh 2020-04

4. Observe that correct output should be:
   zaxxon.zip 2020-04-22 10:13 | 15K
   zexasltd.lzh 2020-04-22 10:13 | 19K
   zoom909.lzh 2020-04-22 10:13 | 19K

This can be verified by browsing (in your PC) to
https://www.msxarchive.nl/pub/msx/games/roms/msx1/

Note the missing part at the end.
This does not happen when the path is local (on Raspberry Pi), therefore the error must be on the routine that parse the output from the http calls.