Questions tagged [debugging]
The process of discovering and diagnosing bugs in software. Use [bugs] to ask about specific defects in well-known software that are already known and (presumably) understood.
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Where can I find a schematic of the AT&T KBD 301?
Where can I find a schematic of the AT&T KBD 301?
I have an old AT&T 6300 (AT&T's rebrand of the Olivetti M24) but the keyboard (AT&T KBD 301) is not working.
Many of the keys do work ...
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History of static analysis tools for defect identification
As part of an article I'm writing, I wanted to give a sense of how long static analysis tools have been with us. There was no mention of them in my copy of The Mythical Man-month (1982 edition). This ...
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Did x86 CPU vendors like Intel, NEC, AMD, and Cyrix provide their own debugger for DOS with better CPU support and was it free?
MS-DOS's debugger DEBUG.EXE did only support the assembly/disassembly of 8086 opcodes.
DR-DOS's debugger SID86.EXE, SID.EXE and Novel's debugger DEBUG.EXE did support 80286 opcodes and more, but no ...
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What is the difference between the different versions of the SID or SID86 debugger for the x86 PC that was shipped with the different DR-DOS versions?
I did a little research about Digital Research's 8086 Symbolic Instruction Debugger. Short name SID86.EXE and SID.EXE in later versions. But I couldn't find some sort of version history?
I would ...
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Obtaining a CPU execution trace on a Commodore 64 [closed]
I need to collect the execution trace of all instructions executed by the 6502 on a C64. I tried C64 Debugger, but I couldn't find any option for this. Is it possible to obtain with C64 Debugger? Are ...
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What did memory dumps look like on 36-bit machines like PDP-10s?
I spend a lot of time looking at hex dumps of memory, which have a format that should be familiar to most:
00010000 00 FF 48 65 6c 6c 6f 20-77 6f 72 6c 64 21 00 00 ..Hello world!..
But on 36-bit ...
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Is there a standard interface for connecting debuggers to emulators?
Does any emulator have an interface, let's say with sockets, to which an arbitrary application can connect and get data so as to implement a debugger or monitor, etc?
I know you could achieve this by ...
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How can I install debug VXDs from the Windows 98 DDK?
The core OS debug VXDs are provided in the DDK as separate VXDs, as opposed to being packed into a single VMM32.VXD file. Furthermore the readme file with the DDK indicates that copying all the ...
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Why does trying to break into the NT 3.1 kernel reboot my 486DX4 machine?
I installed Windows NT 3.1 on a Compaq ProSignia 3080 system, because of several reasons: I know that this machine was running Windows NT 3.1 when it was in productive use. And I think this machine ...
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How did the "Programmer's Switch" work on early Macintosh Computers?
The early Apple Macintosh computers (original Mac, Mac 512K, Mac Plus) all came with a "Programmer's Switch" installed on the side. I believe this persisted for a long time, with the switch ...
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Dump process memory of Windows 3.1 control panel applet
I'm trying to work out how a Control Panel applet on Windows 3.1, which interacts with some host-specific hardware, works and as part of this I'd like to dump the contents of memory which the process ...
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Use MAME debugger for Amiga software [closed]
I have used the MAME debugger a lot with arcade machine emus.
Now I would like to use it to help debug a game I build for Amiga. Having set up A500 emulation in MAME by adding the roms, I can start it,...
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How did ZX81 assembly debuggers implement breakpoints?
What techniques were used for implementing breakpoints on the ZX81? Traditionally for the 8086 int 3h is used, for the 8080 on CP/M with DDT RST 7 as single byte replacements, 6502 has the BRK ...
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What was the first mainstream advanced debugger?
What was the first mainstream development toolchain that provided advanced debugging facilities?
By "mainstream" I mean something that was available on home computers, not mainframes or super-...
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Can I trigger the Amiga ROM debugger from the boot prompt?
Suppose I have an Amiga computer without any working boot disks. Is it possible to trigger the built-in ROM monitor (RomWack or SAD, see https://theamigamuseum.com/amiga-kickstart-workbench-os/guru-...
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How can I debug a Mac OS Classic application?
I have a Mac OS Classic application (a game) that I want to "debug". It has data files in a unique format than I am attempting to reverse-engineer. I've made some progress with a hex editor, but ...
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How was the Intel 80486 debugged? [closed]
How was the Intel 80486 (from 1989) debugged? I'm assuming it was written in some HDL language, like Verilog. However, how was testing and debugging of the CPU carried out?
Were there several steps ...
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Mysterious things happening to stack when running a debug session
When I run a debug session using FreeDOS and DEBUG.EXE, I get a session like the following. I've added a description of what I saw as annotation on the image. Each step, I've printed out the stack ...
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Is it possible to use the BRK instruction when ROM is banked out?
I used to use the BRK instruction when debugging on the C64.
However, when I bank out ROM with...
lda #$35 // Bank out kernal and basic
sta $01 // $e000-$ffff
...the BRK instruction (...
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Commercially available computer with single-step feature?
Was there ever a commercially available hobbyist/teaching computer with the ability to single-step the processor? Maybe a Z80-based machine?
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What is the first computer architecture that knew code from data?
The CPU being able to tell code and data apart to prevent inadvertent or malicious execution of data as instructions by trapping (even if the bit pattern of the data can be interpreted as a valid ...
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Does a CDC 1604 emulator exist with a functional FORTRAN compiler?
The first FORTRAN compiler for the Soviet BESM-6 mainframe was written by means of manually retargeting the assembly code of the CDC 1604 FORTRAN compiler donated by CERN to JINR.
As a result is it ...
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Remote Debugging on the Atari ST
Were there ever any remote debugging tools for the Atari ST line of machines? When developing games in full screen modes, switching away to a debugger seems quite cumbersome if you need to remember ...
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How were bugs reported for compilers that were shipped on floppy disks?
Take the Microsoft C 1.0 compiler for example. It shipped on multiple 5.25" 360K disks, and when it ran on machines without internal hard disk, so users had to switch floppies between the editor, ...
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How did debugging software run without memory protection?
Debuggers are carefully written programs that peek and poke other programs while they run. In retrocomputers, programs could use any part of the memory they could access.
So how did debuggers insert ...
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