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+====== lDebug release 5 ======
+**2023-03-08**
+The lDebug release 5 is imminent. Update: The release is done, grab packages at https://pushbx.org/ecm/download/ldebug/ or the source at https://hg.pushbx.org/ecm/ldebug/rev/release5
+===== =====
+It brings several new features:
+  * Support for 40-column displays in the R, U, D, and E commands
+  * Expression types
+  * The QA and QB and QC and QD commands
+  * RC buffer commands
+  * The RVP and RVD commands
+  * The device driver mode
+  * The conditionally debuggable lCDebug build option
+  * Dual code segments build option
+  * Sharing serial IRQs
+  * The TAKEN and NOTTAKEN keywords
+  * Debugger exception areas and AMIS private function 33h
+  * The CLR operator
+  * Variables to control the default length of U and D commands
+  * INSTALL and UNINSTALL commands
+  * Descriptor modification commands
+  * Query patch support for bootloaded mode
+  * MMX  support commands fixed
+  * ''IF EXISTS R variable THEN'' command
+It also has a number of bugfixes, including:
+  * lDebugX in PM handles 32-bit offsets correctly more often, detects use of 32-bit offsets from limits > FFFFh
+  * Use of the scratch selector works in some cases where it would have failed
+  * R write memory variable command doesn't crash for values ending in FFFFh anymore
+  * A range parameter can be ended by a semicolon comment indicator
+  * Interrupt 19h call while in application mode now sets up registers to terminate the process on the next trace step
+  * Current PSP is read and written using the SDA even in PM
+  * Empty binaries now cause an error even if the DOS incorrectly handles them (FreeDOS kernel bug)
+  * No longer crash in init if there's no UMCB but int 21.5803 is supported
+  * Do not crash in init if int 2Fh is not initialised
+  * WHILE condition not checked if pass or non-pass permanent breakpoint runs
+  * The ldebug.txt file is now converted to CR LF line endings immediately after Halibut has created it
+  * Command line tail in PSP also set up for loading .BIN files
+  * Empty /C switch does not cause an error
+  * Terminate properly on reaching the end of a stdin file
+  * AAM and AAD do not display an operand in disassembly if it would be ''0A''
+  * RC buffer execution is aborted by a Control-C
+  * XMS Protected Mode entrypoint is no longer used by default
+  * ''r f .'' works
+  * Bootloaded sector read that crosses a 64 KiB DMA boundary copies correct amount of data from transfer buffer
+  * ''u(bootldpunit).(bootldppart)'' works even if LDP is a diskette file system
+  * Serial IRQ handler passes on call if its IRQ isn't set in the In-Service Register of the PIC
+  * RC command line parsing skips leading blanks
+  * Double slash without subsequent command line allowed for ''BOOT PROTOCOL'' command
+  * E and A commands in PM display original selector even if actually writing through the debugger's scratch selector
+  * C command never uses debugger's scratch selector (and does not display it either)
+  * Do not fault if scratch selector got a low limit in some way
+  * ''BOOT PROTOCOL'' command always allows use of ENTRY and BPB parameters
+  * Allow all address specifications for M command
+  * Disassemble ''mov'' with segreg and memory operand as always m16
+  * Allow operators between ''??'' and ''::'' in H command
+  * Allow single-digit interrupt number for RIxxy variables
+  * Disabling string instruction simulation now assumes count as 1 for the access variables
+  * Operand size prefix disassembled as part of a ''push'' or ''pop'' with segreg
+  * Do not simulate string instruction on U command
+  * lDebugX preserves scratch selector across ''getexpression'' calls
+  * lDebugX TSR command works in PM
+  * Set sleep delta limit to 5 to work around idle function needing more than 1 timer tick
+  * Allow bootloaded debugger to access small FAT32 file systems (below 64 Ki clusters)
+  * Q or QA could fail due to corrupting the client stack in the PM interrupt 21h handler
+  * Access variables for ''int'' instructions select size based on mode, ignore operand-size of the instruction
+  * Fix S command error if search mask is longer than search area
+  * Support ''EXECUTING'' keyword on non-386 machines
+  * Allow access to ''VD'' variable using R command
+  * Creating a process resets the DTA
+  * Bootloaded init relocation could corrupt part of the debugger in an unlikely case
+  * RM command and MMxy register reads work
+{{tag>ldebug}}
+~~DISCUSSION~~

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