https://pushbx.org/ecm/dokuwiki/ 2026-04-09T04:48:24+00:00 https://pushbx.org/ecm/dokuwiki/ https://pushbx.org/ecm/dokuwiki/lib/tpl/dokuwiki/images/favicon.ico text/html 2024-01-08T09:42:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0107_enhanced_dr-dos_single-file_load?rev=1704703348&do=diff Enhanced DR-DOS single-file load 2024-01-07 As I had previously mentioned on the FreeDOS FDISK bug tracker on github, I went and combined the EDR-DOS kernel files to create a single-file load experience. <https://pushbx.org/ecm/doc/ldosboot.htm#protocol-sector-iniload> <https://pushbx.org/ecm/doc/ldebug.htm#buildingprocess> <https://www.bttr-software.de/forum/forum_entry.php?id=20762&page=1&category=0&order=time> I also described some possible advantages to a single-file load in the BT… text/html 2024-01-24T11:33:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0124_december_january_work_brief_overview_of_the_last_6_weeks?rev=1706092404&do=diff December January work: Brief overview of the last 6 weeks 2024-01-21 It's been a while since I got to write one of my regular blog posts. Hence, forgive me for being brief. TracList * Round parens are accepted as relocation markers throughout * Allow to highlight opcode after brackets in a line * Allow highlighting when a line ends in a dash after machine code * Allow a match after brackets/parens, but not if the match would start with a relocated value text/html 2024-01-29T18:08:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0129_late_january_work?rev=1706548136&do=diff Late January work 2024-01-28 Here's this week's work. lDebug dpb.eld * Add ADDRESS mode to specify address to read DPB from instead of a drive * Add EXTENDED= mode with FREEDOS, MSDOS, and EDRDOS keywords to select format * Add ONLY keyword to skip base DPB * Add LIST SKIP number and LIST DRIVE drive modes to use DPB pointer chain from the DOS List of Lists text/html 2024-02-04T12:47:25+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0204_various_freedos_boot_sector_loaders_memory_overlap_cases?rev=1707047245&do=diff Various FreeDOS boot sector loaders memory overlap cases I created several test cases to figure out how some of the FreeDOS loaders can exhibit memory overlap in some conditions. I uploaded all the files involved (except for the repos, qemu, and NASM) to text/html 2024-02-14T17:47:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0214_remote_debugging_of_svarcom_and_dos_navigator_incompatibility?rev=1707929246&do=diff Remote debugging of SvarCOM and Dos Navigator incompatibility Robert recently asked me to help figure out an incompatibility where Dos Navigator would be unable to execute programs when run on SvarCOM as the shell. Some details are provided in the bug report. Read on for an overview of how we debugged this. text/html 2024-02-18T18:18:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0218_early_mid_february_work?rev=1708276722&do=diff Early mid February work 2024-02-18 In the last three weeks several developments occurred. Last Friday, I also created release 7 of lDebug. instsect Several bugfixes: * /MS= didn't allow sector sizes other than 8192 to be specified * /MS= and /MO= didn't accept hexadecimal input with 0x prefix * All switches text/html 2024-03-03T17:22:46+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0303_late_february_work?rev=1709482966&do=diff Late February work 2024-03-03 This week some development happened on lDebug, inicomp, and ldosboot. (At the time of this writing, the prior blog post still isn't released. Oh well.) The SvarDOS repo for Enhanced DR-DOS had some discussion about compression formats. lDebug * Work around old Exomizer incorrectly checking its -P switch, by doubling it text/html 2024-03-03T17:09:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0303_mid_late_february_work?rev=1709482194&do=diff Mid late February work 2024-02-25 This week some development on lmacros, instsect, lDebug, and EDR-DOS and FreeDOS happened. lmacros Add the fill_at_least macros to avoid an overflow in the debugger letting the entire build fail. Instead, the field will be filled if its content is shorter, but allowed to assemble as well if the content is as long as or longer than the fill length. text/html 2024-03-11T17:36:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0311_early_march_work?rev=1710175014&do=diff Early March work 2024-03-10 This week I modified inicomp and lDebug, and finished another lDebug release. inicomp The changes primarily involved adding the lCFG block to the inicomp stage. This block is stored within the first 256 Bytes of the stage in order to support the use of ldosboot's checkpl checksumming stage. text/html 2024-03-14T09:51:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0314_the_protected_mode_int_21h_handler_mystery?rev=1710406312&do=diff The Protected Mode int 21h handler mystery Following the bug report on the forum, I changed the PM int 21h handler of lDebugX to first switch stacks and then transfer control to the code section, as the transfer function as yet requires a 16-bit stack (either ss B bit or esph must be zero). text/html 2024-03-19T19:20:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0319_early_mid_march_work?rev=1710872410&do=diff Early mid March work 2024-03-17 This week I worked a little on lDebug(X) and inicomp. I also prepared another two blogposts, the PM int 21h handler mystery and a yet unreleased post. Further, I have considered a new repo which will be based on the mak script of lDebug and will provide the scripting needed to wrap and optionally compress the Enhanced DR-DOS single-file kernel or the FreeDOS kernel. This will also eventually lead to CONFIG block support in inicomp and fdkernpl (part of ldosboot… text/html 2024-03-20T19:32:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0320_on_words_for_my_work?rev=1710959574&do=diff On words for my work I recently had an opportunity again to note that I like to call my self an amateur. While relating this I also specified that the word comes from amare, "to love". I just checked this and my anecdote appears to be actually correct. This led me to think about words some more. I have a particular dislike for "hobbyist" because I associate "hobbyists" with sloppy and immature work. Technically, I do carry out my contributions as a "hobby" but I just don't like this term. (T… text/html 2024-03-29T20:53:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0329_late_mid_march_work?rev=1711742000&do=diff Late mid March work 2024-03-24 This week I worked some on instsect, ldosboot, and lDebug. Some development on Debug/X happened as well (1, 2), part of which was in response to my bug reports (1, 2). instsect While using instsect to install a stackoverflow user's boot sector loader I noticed that it misdetected two filenames in the error messages. This was because their error messages happened to be in allcaps. It turned out to be sufficient in this case text/html 2024-04-02T19:39:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0402_late_march_work?rev=1712079596&do=diff Late March work 2024-03-31 lDebug * Do not use AX in LINKCALL ELD * Fix builds without history or with history in the data/entry segment * Fix, do not parse opening paren of linear address as part of the expression * Documentation updates EDR-DOS * Pick SvarDOS kernel patches since January * compbios, compbdos: Port to ia16 gcc with libi86 by using a far buffer for input ( text/html 2024-04-08T19:51:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0408_ldebug_work_in_early_april?rev=1712598700&do=diff lDebug work in early April 2024-04-07 Updates to the manual Only listing the most important changesets: * List INSTALL TOGGLE * List more INSTALL nouns (1, 2, 3) * Document L and W commands for sectors * Update vardco with 7th variables Code changes * init and qq will disable interrupts while relocating EBDA * bb: Many comments added and updated text/html 2024-04-14T18:21:16+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0414_ldebug_work_in_mid_early_april?rev=1713111676&do=diff lDebug work in mid early April 2024-04-14 Documentation or comment only changes * isvariab.mac: Comment on structure and macro * expr.asm: Note NC after addition didn't carry, needed to return success * expr.asm: Note that variable setup functions may CHG dx * amount.asm: Note that we use a mov cx, 0 to preserve the Carry Flag (instead of the shorter text/html 2024-04-28T17:47:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0428_late_april_work?rev=1714319263&do=diff Late April work 2024-04-28 I didn't upload the prior blog post yet as of the time of this writing. Oh well. This week I worked some on ACEGALS, lDebug, and the MS-DOS v4.01 sources newly released as free software. ACEGALS The CHG definition now lists that CHGed registers are call-clobbered whereas those not listed in a CHG nor OUT block (when a CHG block exists) are call-preserved. These terms are text/html 2024-04-28T17:47:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0428_mid_late_april_work?rev=1714319260&do=diff Mid late April work 2024-04-21 This week I worked on several projects. Instruction reference * Specify sizes of some imm operands * Fix wrong parentheses * Fix NTVDM BOP, it is an LES not LEA MSDebug * Bugfix: CALL and JMP with an operand of the form SSSS:OOOO is always assembled as far, even if the segment matches the segment being assembled into (bug in original MS-DOS Debug) text/html 2024-05-12T20:12:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0509_early_may_work_on_ms-dos_ldebug_etc?rev=1715537544&do=diff Early May work on MS-DOS, lDebug, etc 2024-05-05 This week I worked primarily on the newly released MS-DOS v4.00 sources, which are FLOSS except for the toolchain. The tools are included under the MIT license but as binaries only. devload The devload help usage message was displayed twice, text/html 2024-05-12T20:31:02+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0512_early_mid_may_work?rev=1715538662&do=diff Early mid May work 2024-05-12 wwwecm scripts Added msdos4 build. Added kernwrap as a dependency for edrdos and msdos4 builds. MSDebug Added the function checkend to the assembler, reject most cases of trailing garbage after the last accepted operand. Some cases remain, eg in, out, shifts and rotates. But many cases like mul, mov, xchg, push, and pop no longer accept trailing garbage. text/html 2024-05-21T19:34:19+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0521_mid_late_may_work?rev=1716312859&do=diff Mid late May work 2024-05-19 lDOS MBR * Work around Book8088 / Xi8088 BIOS bug when detecting LBA * Optimisation: Do not zero CX after rep movsw * Normalise function 41h input al=dh=0 * Optimise: Share pushing DI before oldmbr CHS and LBA dispatch * Check for CHS overflow * Share setting DL after oldmbr CHS and LBA dispatch * Optimise: Make secpercyl a word, and re-use zero in DX * Drop CHS overflow check for last division, it is always passed text/html 2024-05-28T20:30:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0528_late_may_work?rev=1716921030&do=diff Late May work 2024-05-26 instsect Fix: A nonblank after a blank was accepted if it occurred in the last byte of a field (base name or extension). I noticed this while checking that instsect and lDebug both can cope with DR-DOS corrupting DI on int 25h/26h, which I previously had to fix in FreeDOS SYS. (They can.) text/html 2024-06-02T19:18:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0602_barely_any_work_in_the_may_june_week?rev=1717348706&do=diff Barely any work in the May June week 2024-06-02 lDebug The chstool Extension for lDebug gained a new mode, CHSTOOL GEOMETRY unit, which just initialises a unit and displays the detected amount of Heads and Sectors (in hexadecimal and decimal). The manual was updated with some comments on boot load protocol compatibility. text/html 2024-06-06T20:38:21+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0606_an_idiom_on_failure?rev=1717699101&do=diff An idiom on failure mistake Unnatural Selection startrek idioms text/html 2024-06-12T21:47:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0612_early_june_work?rev=1718221630&do=diff Early June work 2024-06-09 lDebug The load_unit_flags equates are moved into iniload.mac, and a data link is added for load_unit_flags. The chstool Extension for lDebug will now use these flags. instsect Add flag _LBA_WORKAROUND to the LBA detection search strings. Not yet uploaded: Detect doubles in the LBA search strings, and eventually avoid writing them. text/html 2024-06-15T18:42:08+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0615_june_vacation?rev=1718469728&do=diff June vacation For the 1.26 regular readers of this blog: I am on vacation for two weeks starting today so there likely won't be the regular weekly blog posts during this timeframe. vacation text/html 2025-11-09T22:05:53+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0618_on_what_a_heuristic_is?rev=1762722353&do=diff On what a heuristic is heuristic English Wikipedia: Conjunction fallacy idioms heuristic wikipedia text/html 2025-11-09T22:05:35+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0618_what_is_a_game?rev=1762722335&do=diff What is a game? The mundanity of magical practice idioms game obstacles amateur amare text/html 2024-06-30T17:33:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0630_mid_to_late_june_work?rev=1719761591&do=diff Mid to late June work 2024-06-30 The last three weeks included a vacation time for me. I didn't do a lot of work during these two weeks. TracList An initial revision of the convedr.pl script. This only handles RASM-86 output files correctly so far, combined with WarpLink map files. After text/html 2024-07-01T19:47:03+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0701_support_of_segment_overrides_for_xlatb?rev=1719856023&do=diff Support of segment overrides for XLATB Copied from a mail sent to freedos-devel: On at 2024-06-30 23:04 +0200, Bernd Böckmann via Freedos-devel wrote: " Hello, I have a question our assembly people: I stumbled upon an unusual instruction in the EDR-DOS source [1]. In RASM86 this is expressed as text/html 2024-07-08T19:03:50+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0708_early_july_work?rev=1720458230&do=diff Early July work 2024-07-07 Enhanced DR-DOS * Add listing file output for dosgrps.asm * Fix: LFN search calling the redirector should not expect FAT+ size bits in the DTA * Fix: Address all new LFN variables using the BDOS_DATA segment instead of a mix TracList * convedr.pl: * extract function to process .rel file * allow lack of initial blank before offset of machine code dump * allow specifying explicit .rel files * subtract group base from segmented section address in … text/html 2024-07-14T20:48:06+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0714_early_mid_july_work?rev=1720982886&do=diff Early mid July work 2024-07-14 This week I started the ident86 project, which combines several parts to aid in comparing ports from one assembly language dialect to another. WarpLink The build using the mak.sh script now creates NASM listing files. These are for use with the convert listing files script. text/html 2024-07-22T17:38:36+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0722_no_blog_post_in_mid_late_july?rev=1721662716&do=diff No blog post in mid late July The Düsselcafé was closed yesterday (2024-07-21 Sunday) so I didn't get to prepare a blog post on the HP 95LX as usual. I will likely continue the regular posts next Sunday. Teaser: I completely ported MSDebug to build with only NASM, WarpLink, x2b2, and convlist.pl. text/html 2024-07-29T19:29:46+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0729_mid_to_late_july_work?rev=1722274186&do=diff Mid to late July work 2024-07-28 The last two weeks I improved ident86 and used it to identicalise the Enhanced DR-DOS drdos module (ported to JWasm) as well as a new port of MSDebug to NASM. This new port re-used the fixmem.pl script from the WarpLink port to NASM. text/html 2024-08-09T17:51:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0809_freedos-devel_mail_on_edr-dos_single-file_load_jwasm_port_and_ident86?rev=1723218674&do=diff freedos-devel mail on EDR-DOS single-file load, JWasm port, and ident86 Copied from my mail to the freedos-devel list. Hello Eric, hello list, On at 2024-07-26 13:04 +0200, Eric Auer via Freedos-devel wrote: " Hi! News from BTTR: <https://www.bttr-software.de/forum/board_entry.php?id=20959&page=0&order=time&category=0> while working on a single-file version of the EDR-DOS kernel, text/html 2024-08-12T19:21:40+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0812_early_august_work?rev=1723483300&do=diff Early August work 2024-08-11 EIDL EIDL was a simple TSR that installed an int 28h handler which runs a hlt instruction, then chains to the prior handler. My adaptation of it combines the simple handler with the TSR example's multiplexer, as well as the optimal installation and advanced deinstallation method. text/html 2024-08-20T19:41:44+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0820_mid_august_work_not_much?rev=1724175704&do=diff Mid August work (not much) 2024-08-18 fixmem * Call addequate for section or group names listed in WRT clauses, and add section or group name to the equates structures Enhanced DR-DOS Finished port of drbio to NASM. ident86 * Add -f switch to change or increase default fuzzy compare equal delta limit (from default 32) text/html 2024-08-27T18:50:04+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0827_ldos_fat32_fsiboot5_experimental_revision?rev=1724777404&do=diff lDOS FAT32 + FSIBOOT5 experimental revision Copied from my mail to the freedos-devel list. On at 2024-06-02 19:45 +0200, E. C. Masloch wrote: " On at 2024-06-02 13:31 +0200, Bernd Böckmann via Freedos-devel wrote:" [...] " " Thinking of this LBA, non-LBA thing we might investigate if it is possible to merge the LBA and non-LBA FAT32 VBR code into one. But that is for another topic. We also might replace the loaders with some other one. If I remember correctly ECMs lDOS loaders have th… text/html 2024-08-27T19:19:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0827_mid_late_august_work?rev=1724779170&do=diff Mid late August work 2024-08-25 lDebug Bernd Böckmann requested a build of lDebug that can be booted on a machine with 256 KiB of low memory. I prepared smalll.sys, which can boot with as little as 192 KiB and leaves 86 KiB resident. This required a few changes: * Fix build with _EXTHELP=0 * Fix build with _EXTENSIONS=0 Unrelated changes: * Update copyright year in debug.asm, msg.asm, uu.asm, the online help page ?L, and the manual lDOS boot (experimental) text/html 2024-09-10T19:06:11+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0910_early_september_work?rev=1725987971&do=diff Early September work 2024-09-08 The prior week nothing changed and that Sunday I didn't get to write a blog post regardless. This week some changes did happen. inicomp * Add _OPTIMISE_SMALL_INPUT define. Barely used yet. This actually sat in my repo for a while already but I only got around to committing it last Sunday. text/html 2024-09-17T20:26:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0917_early_mid_september_work_on_ldebug_edr-dos_and_ldos_instsect?rev=1726597601&do=diff Early mid September work on lDebug, EDR-DOS, and lDOS instsect 2024-09-15 lDebug * Add structure for Extension for lDebug (ELD) trailer header * Support ELD trailer header in debugger's ELD loader * Support ELD trailer header in list.eld * Add eldapend tool to create a file with ELD trailer header pointing at an ELD * text/html 2024-09-22T17:53:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0922_mid_september_work_on_fixupp_instsect_and_ldebug?rev=1727020421&do=diff Mid September work on fixupp, instsect, and lDebug 2024-09-22 This week some interesting developments occurred. fixupp This tool is a re-implementation of the ltools/fixupp.exe that was included in the OpenDOS 7.01 Machine Readable Sources package, as that was provided without sources. It operated on RASM-86 output object files to make them compatible with the object files assembled by JWasm. The exact purpose perpetually escapes me. text/html 2024-09-23T21:12:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0923_on_the_eve_of_6000_changesets_ldebug_growth?rev=1727118748&do=diff On the eve of 6000 changesets: lDebug growth Counting all the changesets in the public hg lDebug repo since the first revision on 2010-10-24 we're at changeset 5997 now. Have some statistics about the size of the sources: These counts were generated using the cntlines program. The lDebug revisions are as linked above. The FreeDOS Debug/X revision is text/html 2024-09-30T21:21:07+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/0930_late_september_work?rev=1727724067&do=diff Late September work 2024-09-29 instsect The instsect application now supports double quote marks around the /SG= string, so that copying the output of the application to specify as /SG= is supported. However, the closing quote mark must end the entire string, it is not supported to toggle quoted and unquoted parts arbitrarily. text/html 2024-10-13T17:59:13+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1013_late_september_early_october_work?rev=1728835153&do=diff Late September, early October work 2024-10-13 Last Sunday (2024-10-06) I travelled back from my partner's place, so I didn't get to write a blog post. Therefore we'll cover two weeks' worth of work today. kernwrap All of these changes were picked from lDebug. text/html 2024-10-28T20:47:13+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1028_mid_to_late_october_work?rev=1730144833&do=diff Mid to late October work I didn't get around to writing a blog post last week, so this one covers two weeks' worth of work. 2024-10-27 Instruction set reference Fixed insSTOSB stating that it "sets the flags accordingly". Also add to other string instructions that flags are not modified (ins, lods, movs, outs). text/html 2024-11-04T18:13:29+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1104_october_november_work_on_porting_the_ms-dos_v4.01_kernel?rev=1730740409&do=diff October November work on porting the MS-DOS v4.01 kernel 2024-11-03 Today I finally uploaded the first steps toward porting the free software MS-DOS kernel (released on 2024 April 26) to build with NASM and WarpLink (and x2b2 and round and convlist.pl). So far only one file has been ported. text/html 2024-11-11T19:03:21+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1111_early_november_work?rev=1731348201&do=diff Early November work 2024-11-10 This week some work happened on Enhanced DR-DOS, lDebug, MSDebug, and MS-DOS. I was also involved in commenting on several stackoverflow questions. stackoverflow MS-DOS Debug misbehaves when writing to 1000h:0 A user attempted to assemble some code at 1000h:0 using the command text/html 2024-11-18T19:14:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1118_early_mid_november_work_on_porting_the_ms-dos_kernel?rev=1731953698&do=diff Early mid November work on porting the MS-DOS kernel 2024-11-17 This week I mostly spent on continuing to port parts of the msdos kernel module of my fork of the free software MS-DOS v4 kernel. fixmem This tool was updated to better handle the conversion of the msdos sources. After several small updates, it also gained support for section ENDS directives and handling of ASSUME directives. Assumptions are used to automatically insert segment overrides when accessing variables that are known t… text/html 2024-11-25T18:25:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1125_mid_late_november_work_on_porting_the_ms-dos_kernel?rev=1732555554&do=diff Mid late November work on porting the MS-DOS kernel 2024-11-24 This week I worked on porting some more of the MS-DOS kernel to NASM, starting on the msbio module. x2b2 * Bugfix, when the MZ .EXE header indicates a last page size of 0 this means it text/html 2024-12-03T19:11:32+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1203_november_december_continued_work_on_ms-dos_porting_and_ldebug?rev=1733249492&do=diff November December: Continued work on MS-DOS porting, and lDebug 2024-12-03 This Sunday I was sick at home so I didn't get to write a blog post. Luckily I found some time today (Tuesday). lDebug Some older changesets uploaded now are about comments in the line assembler source texts. text/html 2024-12-04T13:01:43+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1204_notes_on_porting_ms-dos_msdos_msbio_share?rev=1733313703&do=diff Notes on porting MS-DOS (msdos, msbio, share) 2024-12-04 I finally get to describe the porting work done on the fork of MS-DOS v4 some. Workflow The final workflow went something like this: * Set and export f variable to next object basename (uncapitalised, without filename extension) text/html 2024-12-11T14:30:36+00:00 Anonymous (anonymous@undisclosed.example.com) https://pushbx.org/ecm/dokuwiki/blog/pushbx/2024/1211_early_december_work?rev=1733923836&do=diff Early December work 2024-12-08 Today marks the 100th blog post that I wrote on the HP 95LX. It also is likely to be the last post in December due to the café closing for a few weeks starting tomorrow. lDebug The lDebug repo got updated some. *