04.05.2014 02:33, Frantisek Hanzlik пишет: > Hi DOSEMU and FreDOS developers, > > FreeDOS 'more' command (tried both 4.2 and 4.3 versions) isn't working > correctly under DOSEMU when used in screen resolutions other than 80 > columns x 25 rows. From its code (function GetScreenSize() in more.c) > it seems as more compute no. of screen rows from BIOS data area, from > 40h:4Ah (Columns on screen) and 40h:4Ch (Video page size) values, > using formula: > ROWS=Video page size / Columns on screen / 2 > > which in this case give bad results, as Video page sizes are multiples > of 4k (number of columns is OK). Here is what Video page size values > are returned in certain text modes: > > 80x25 - 40:4C=0x1000=4096, more has 25 rows. 80x25x2=4000=0xFA0 > 80x43 - 40:4C=0x2000=8192, more has 51 rows. 80x43x2=6880=0x1AE0 > 80x50 - 40:4C=0x2000=8192, more has 51 rows. 80x50x2=8000=0x1F40 > 80x60 - 40:4C=0x3000=12288, more has 76 rows. 80x60x2=9600=0x2580 > 132x25 - 40:4C=0x2000=8192, more has 31 rows. 132x25x2=6600=0x19C8 > 132x43 - 40:4C=0x3000=12288, more has 46 rows. 132x43x2=11352=0x2C58 > 132x60 - 40:4C=0x4000=16384, more has 62 rows. 132x60x2=15840=0x3DE0 > > >From some informations on net (e.g. here: > http://marc.info/?l=freedos-dev&m=106291977718089&w=2 > ) it seems as video page size isn't reliable/suitable for no. of rows > on screen computing - but I'm not sure, as this may be DOSEMU bug > as well. I want to report a bug, but what? DOSEMU, or 'more' command? I think it is a bug in dosemu (or both). I am currently experimenting with bochs vgabios, and it has different page alignment than the one of dosemu. Namely:
-#define TEXT_SIZE(co,li) (((co*li*2)+4095)&(~4095)) /* 4000(4096?) text page size */ +#define TEXT_SIZE(co,li) (((co*li*2)|0xff)+1) So please try 'vbios_tweaks' branch and see if maybe mode is now fine? ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available. Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Dosemu-devel mailing list Dosemu-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dosemu-devel
