WEBVTT 00:00.820 --> 00:10.000 The Netwide assembler Nasm is an 80 x 86 assembler designed for portability and modularity. 00:10.030 --> 00:19.540 It supports a range of object file formats, including Linux and NetBSD FreeBSD a dot out elf coff Microsoft 00:19.540 --> 00:24.310 16 bit object file and win 32 and others. 00:24.340 --> 00:30.650 It will also output plain binary files, so its syntax is designed to be simple and easy to understand. 00:30.670 --> 00:34.240 So similar to Intel's but less complex. 00:34.240 --> 00:44.290 So it supports Pentium P6, MKs 3D now SE and SSI two Opcodes plus it has a macro capability, which 00:44.290 --> 00:44.860 is good. 00:45.010 --> 00:47.440 You will use that next lectures. 00:47.650 --> 00:53.920 And let's ask a question to ourselves why yet another assembler? 00:53.950 --> 01:04.300 The Netwide assembler grew out of an idea on pump lanc, ESM x86 or possibly altalink that ESM, which 01:04.300 --> 01:12.820 was essentially that there didn't seem to be a good 386 series assembler around and that maybe someone 01:12.820 --> 01:14.410 ought to write one. 01:14.410 --> 01:16.360 So I wrote the. 01:17.260 --> 01:20.300 I compared this assemblers 1 to 3. 01:20.320 --> 01:21.460 These five assemblers. 01:21.460 --> 01:25.390 Actually, the six is an assembly between each other. 01:25.420 --> 01:29.810 So let's start from the a86. 01:29.830 --> 01:33.810 So A86 is good, but not free. 01:33.820 --> 01:40.300 And in particular, you don't get any 32 bit capability until you pay and it is thus only two. 01:40.450 --> 01:43.060 We have also gas here. 01:43.150 --> 01:51.370 Gas is free and ports over Dos and Unix, but it's not very good since it's designed to be back end 01:51.370 --> 01:55.240 to GCC which always feeds it correct code. 01:55.240 --> 01:57.980 So it's error checking is minimal. 01:58.000 --> 02:05.140 Also, its syntax is horrible from the point of view of anyone trying to actually write anything in 02:05.140 --> 02:05.260 it. 02:05.260 --> 02:07.840 Plus you can't write 16 bit code in it. 02:08.110 --> 02:11.020 You can actually, but you can't write it properly. 02:11.020 --> 02:20.780 And we also have s 86 as 86 is a Linux and Linux specific and my version at least doesn't seem to have 02:20.780 --> 02:23.270 much or any documentation. 02:23.860 --> 02:24.300 Um. 02:24.390 --> 02:28.550 Masm is not very good and it's expensive. 02:28.550 --> 02:34.400 Like all the Microsoft uh, things here and it runs only under Dos here. 02:35.000 --> 02:43.610 Um, and we also have TSM, which is better, better than MSM, but still strives for MSM compatibility, 02:43.640 --> 02:49.520 which means millions of directives and tons of red tape. 02:49.520 --> 02:57.050 And its syntax is essentially a msmes with the contradictions and quirks that entails, although it 02:57.050 --> 03:00.830 sorts out some of those by means of idle mode. 03:00.830 --> 03:02.990 And it's expensive too. 03:02.990 --> 03:04.580 And it's only. 03:05.230 --> 03:06.100 Those only here.