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../doc/Ldo_Link_Man.e Linker and loader.
../doc/adbg.help Symbolic debugger.


Standard IO for the loader and disassembler, Ldo and Das, are included by the assembler .REXT directive in Ldo.a, and Das.a, for the system specified by k=# on the AAma command line. See the two source files for the meaning of negative options, k=-#.

In debugging mode, the loader overlays debugging and disassembly functions by reading in two object files, Deb.ab and Dis.ab, assembled from Deb.a and Dis.a. For the Minimum this code may be in ROM instead. A few IO functions from IOst.a are assembled into Deb.ab by a .REXT directive in Deb.a.

Source for disassembling Apple IIGS W65816 code is not included in this distribution.

The symbolic debugger function of Ldo fails under NeXTstep 3.3 on the Previous emulator with new builds or cross builds using the source below. The other functions work as expected. Until the reason is tracked down, the working snapshot version of the Ldo executable provided in ../bin/ should be used to run the debugger. It works with command line windows having 40 rows and 80 columns. The NeXT debugger screen size is set in Deb.a by the following lines:

    scsize: .BYTE 40,80,0,0,0,0     ;screen size.
Ldo.a 02Feb22 17:03:05EST 51K Block object file loader, executor, symbolic debugger.
Das.a 04Jan22 16:59:53EST 24K Disassembler for M68000/68020/68881.
14Sep21 09:36:19EDT
14Sep21 09:36:19EDT
Debugger and disassembler subroutines used by Ldo. Dis.a is also loaded by Das.a.

Command Files

Shell syntax and command names in the following scripts are NeXT specific. A c suffix indicates a cross build using Ldo.
Ldo15.s 14Sep21 09:36:19EDT 328 Ldo15 executable and Deb15.ab, Dis15.ab object file overlays for NeXT.
Ldo14c.s 14Sep21 09:36:19EDT 399 Ldo14c, Deb14.ab, and Dis14.ab for Macintosh.
Ldo15c.s 14Sep21 09:36:19EDT 358 Ldo15c, Deb15.ab, and Dis15.ab for NeXT.
Das15.s 14Sep21 09:36:19EDT 139 Das15 executable for NeXT.
Das14c.s 14Sep21 09:36:19EDT 194 Das14c for Macintosh.
Das15c.s 14Sep21 09:36:19EDT 169 Das15c for NeXT.

Legacy Command Files

The following scripts are included for reference only. They do not run on all systems without shell syntax and command name adjustment, and the path /usr/AMIGA/ used in NAM.s does not occur in any of the system branches in this distribution.
NL.s 14Sep21 09:36:19EDT 79 Ldo for NeXT.
NE.s 14Sep21 09:36:19EDT 98 Deb.ab for specified system.
ND.s 14Sep21 09:36:19EDT 98 Dis.ab for specified system.
NAM.s 14Sep21 09:36:19EDT 254 Ldo.y, Deb.ab, and Dis.ab for Amiga.

Sample Debugger Screen

dscreen.e 14Sep21 09:36:19EDT 2.6K

Das Example

Schipmem.e 14Sep21 09:36:19EDT 1.9K Patches to change the limit on the size of the NeXT Schoonschip RAM workspace.

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