29 Aug
2007
29 Aug
'07
1:25 a.m.
Since I had a Kenbak I decided I wanted an assembler for it. It gets
pretty annoying writing code by hand... I spent a while researching and
found it would be a pretty big deal to write one from scratch. I found
"AS" and have written a target code file for the KENBAK. It is still in
beta, however so far it works perfectly. The only thing left to do is WARN
people when they do something stupid.
I designed the mnemonic set for maximum flexibility and readability. As
you can see my include file has the parameters in long hand. ; ) Its a
goal of mine to get these into schools. I think this assembly language
would be pretty easy for someone who has studied basic or C.
What do you think? Here is sample output from the assembler building a
program from the Kenbak Laboratory Exercises manual. Its the first one in
the book. (I threw in NOOP and HALT at the end for fun) I converted the
octal listing into opcodes, and then reassembled it. I get the same
results. ; ) I've e-mailed the author about including the Kenbak code
generator in the distribution and asked if he could add a command line
option for using octal in the program listing instead of HEX. ; ) If he
won't, I WILL!
Let me know what you guys think... Anyone here have a Kenbak? If not, and
you want one...I've got a few spots left. : ) http://www.kenbakkit.com
Before I include the program listing, here are all of the possible
instructions. This 132 IC TTL computer is purely amazing...
[ADD/SUB/LOAD/STORE] [Addressing Mode], [Register], [Address]
[OR/AND/LNEG] [Addressing Mode], [Register]
[JPD/JPI/JMD/JMI] [Register], [Condition], [Address]
SET [0/1], [Position], [Address]
SKIP [0/1], [Position], [Address]
BSHIFT [Direction], [Places], [Register]
ROTATE [Direction], [Places], [Register]
NOOP (no parameters)
HALT (no parameters)
macro assembler 1.42 Beta [Bld 55]
(i386-unknown-win32)
(C) 1992,2007 Alfred Arnold
68RS08-Generator (C) 2006 Andreas Bolsch
Mitsubishi M16C-Generator also (C) 1999 RMS
XILINX KCPSM(Picoblaze)-Generator (C) 2003 Andreas Wassatsch
TMS320C2x-Generator (C) 1994/96 Thomas Sailer
TMS320C5x-Generator (C) 1995/96 Thomas Sailer
KENBAK-1 TTL Computer Assembler (C) 2007 Grant Stockly
WARNING: KENBAK code generator still in beta
AS V1.42 Beta [Bld 55] - source file ./a/ken.asm - page 1 - 8/29/2007 0:00:48
assembling ./a/ken.asm
PASS 1
1/ 0 : page 0
2/ 0 : cpu KENBAK
3/ 0 : include kenbak.inc
22/ 0 : listing on
23/ 0 :
4/ 0 :
5/ 4 : ORG 004o ;First non-special address
6/ 4 :
7/ 4 : Loop:
8/ 4 : 03 01 ADD Constant, RegisterA, 1
9/ 6 : 1C 80 STORE Memory, RegisterA, Lamps
10/ 8 : E4 04 JPD Unconditional, Zero, Loop
11/ A :
12/ A : 00 HALT
13/ B : 80 NOOP
AS V1.42 Beta [Bld 55] - source file ./a/ken.asm - page 2 - 8/29/2007 0:00:48
symbol table (* = unused):
------------------------
*ARCHITECTURE : i386-unknown-win32 - | *BIGENDIAN : 0 - |
*BRANCHEXT : 0 - | *CASESENSITIVE : 0 - |
CONSTANT : 3 - | *CONSTPI
: 3.141592653589793 - |
*DATE : 8/29/2007 - | *FALSE : 0 - |
*FULLPMMU : 1 - | *HAS64 : 1 - |
*HASDSP : 0 - | *HASFPU : 0 - |
*HASPMMU : 0 - | *INDEXED : 6 - |
*INDIND : 7 - | *INDIRECT : 5 - |
*INEXTMODE : 0 - | *INLWORDMODE : 0 - |
*INMAXMODE : 0 - | *INSRCMODE : 0 - |
*INSUPMODE : 0 - | LAMPS : 80 - |
*LISTON : 1 - | LOOP : 4 C |
*MACEXP : 1 - | MEMORY : 4 - |
*MOMCPU : EBA - | *MOMCPUNAME : KENBAK - |
*NEGATIVE : 5 - | *NESTMAX : 100 - |
*NON_ZERO : 3 - | *PACKING : 0 - |
*PADDING : 1 - | *POSITIVE : 6 - |
*POSITIVE_NON_ZERO : 7 - | REGISTERA : 0 - |
*REGISTERB : 1 - | *REGISTERX : 2 - |
*RELAXED : 0 - | *TIME : 0:00:48 - |
*TRUE : 1 - | UNCONDITIONAL : 3 - |
*VERSION : 142F - | ZERO : 4 - |
44 symbols
37 unused symbols
AS V1.42 Beta [Bld 55] - source file ./a/ken.asm - page 3 - 8/29/2007 0:00:48
codepages:
----------
STANDARD (0 changed characters)
0.01 seconds assembly time
36 lines source file
1 pass
0 errors
0 warnings