Difference between revisions of "LB-6802-01"

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Line 1: Line 1:
−
[[file:LB-6802-02_P1654-720px.jpg]]
+
[[file:LB-6802-01_P1090720-720PX.jpg]]
  
 
== Features ==
 
== Features ==
  
 
* [https://github.com/land-boards/lb-boards/blob/master/RetroCPUs/SIMPLE-6802/PARTS/MB6802_datasheet.pdf 68B02 CPU]
 
* [https://github.com/land-boards/lb-boards/blob/master/RetroCPUs/SIMPLE-6802/PARTS/MB6802_datasheet.pdf 68B02 CPU]
−
** 1.8432 MHz clock
+
** 2 MHz clock
 
** MC6802 is fully compatible with MC6800 but without messy two-phase clocking
 
** MC6802 is fully compatible with MC6800 but without messy two-phase clocking
  
Line 43: Line 43:
 
Name      LB-6802-01_PLD;
 
Name      LB-6802-01_PLD;
 
Partno    ATF16V8B;
 
Partno    ATF16V8B;
−
Date      08/24/24;
+
Date      09/11/24;
 
Revision  01;
 
Revision  01;
 
Designer  DOUG G;
 
Designer  DOUG G;
Line 65: Line 65:
 
PIN    8  = VPA;
 
PIN    8  = VPA;
 
PIN    9  = VDA;
 
PIN    9  = VDA;
 +
PIN    11  = D0;
  
 
/* Address Decode and Chip Select outputs */
 
/* Address Decode and Chip Select outputs */
Line 70: Line 71:
 
PIN    13  = !IOCS;
 
PIN    13  = !IOCS;
 
PIN    14  = !MEMRD;
 
PIN    14  = !MEMRD;
 +
PIN    15  = LED;
 
PIN    16  = !RAMCS;
 
PIN    16  = !RAMCS;
 
PIN    18  = RDY;
 
PIN    18  = RDY;
  
−
ROMCS = CPUA15 & CPUA14 & VPB;
+
ROMCS = CPUA15 & CPUA14 & CPUREAD;
  
−
RAMCS = !CPUA15 & VPB /* 0x0000-0x7FFF 32KB SRAM */
+
RAMCS = !CPUA15 & CPUREAD /* 0x0000-0x7FFF 32KB SRAM */
−
#       CPUA15 & !CPUA14 & !CPUA13 & VPB; /* 0x8000-0x9FFF Free (8KB */
+
#       !CPUA15 & !CPUREAD & VPB;
  
−
IOCS = CPUA15 & !CPUA14 & CPUA13 & VPB; /* 0xA000-0xBFFF Serial (ACIA) */
+
IOCS = CPUA15 & !CPUA14 & !CPUA13 & CPUREAD /* 0x8000-0x9FFF Serial (ACIA) */
 +
#      CPUA15 & !CPUA14 & !CPUA13 & !CPUREAD & VPB;
  
 
RDY = VPB;
 
RDY = VPB;
  
−
MEMRD = CPUREAD & VPB;
+
MEMRD = CPUREAD;
 +
 
 +
LED =  CPUA15 & CPUA14 & !CPUREAD & VPB& D0
 +
#      LED & !(CPUA15 & CPUA14 & !CPUREAD & VPB);
 
</PRE>
 
</PRE>
  
Line 91: Line 97:
 
== Software ==
 
== Software ==
  
−
* [[SIMPLE-6802#Software|Simple-6802 Software]]
+
* [[SIMPLE-6802#Software|Simple-6802 Software]] - code compatible
 
* [https://archive.org/details/How_to_Program_and_Interface_the_6800_By_Andrew_C_Staugaard_1980/page/260/mode/2up How to Program and Interface the 6800 By Andrew C. Staugaard, Jr. 1980]
 
* [https://archive.org/details/How_to_Program_and_Interface_the_6800_By_Andrew_C_Staugaard_1980/page/260/mode/2up How to Program and Interface the 6800 By Andrew C. Staugaard, Jr. 1980]
 
* [http://www.8bit-era.cz/6800.html#addr8-desc 6800 instruction set]
 
* [http://www.8bit-era.cz/6800.html#addr8-desc 6800 instruction set]
 +
 +
==== Builds ====
 +
 +
* [http://www.retrotechnology.com/restore/smithbug.html SMITHBUG] is a debugger similar to MIKBUG
 +
** Examine/Edit memory
 +
** Disassembly code
 +
** Download S record (V2)
 +
** Run code
 +
* FIG-Forth - Forth language
 +
* Combined SMITHBUG and FIG-Forth build
 +
 +
=== Building Code ===
 +
 +
* Uses a68 assembler
 +
** Command line makes S-Record output
 +
* Use srec_cat to shift 4K from EPROM absolute address 0x0000-0x0FFF to 0xF000-0xFFFF as HEX file
 +
* Or shift in the EPROM programmer
 +
 +
=== SmithBUG Builds for LB-6802-01 CPU Card ===
 +
 +
* Pre-built software
 +
** [https://raw.githubusercontent.com/douggilliland/Retro-Computers/master/6800/LB-6802/SMITHBUG_4K/smithbug_F000.hex SMITHBUG 4KB build]
 +
 +
==== 4KB Build ====
 +
 +
<pre>
 +
A68 SMITHBUG_SIMPLE-6802_F000.ASM -l SMITHBUG_SIMPLE-6802_F000.LST -s SMITHBUG_SIMPLE-6802_F000.S
 +
srec_cat SMITHBUG_SIMPLE-6802_F000.s -offset - -minimum-addr SMITHBUG_SIMPLE-6802_F000.s -o smithbug_F000.hex -Intel
 +
</pre>
 +
 +
==== SmithBUG Commands ====
 +
 +
<pre>
 +
; 4 FORTH
 +
; V VIEW MEMORY
 +
; E CHANGE MEMORY
 +
; I FILL MEMORY
 +
; M MOVE MEMORY
 +
; D DISASSEMBLE CODE
 +
; G GO TO PROGRAM
 +
; R PRINT
 +
; @ ASCII CONVERSION
 +
; H PRINTER ON
 +
; J JUMP TO TARGET PROGRAM
 +
; F FIND
 +
; Q HARDWARE LOCATION
 +
; T TRACE PROGRAM
 +
; 1 BREAKPOINT ONE
 +
; 2 BREAKPOINT TWO
 +
; K CONTINUE AFTER BREAK
 +
; & S1 LOAD PROGRAM
 +
; * HARDWARE LOCATION (TBA)
 +
; O ECHO ON
 +
; N ECHO OFF
 +
</pre>
 +
 +
=== FIGFORTH in RAM ===
 +
 +
* [https://www.corshamtech.com/tech-tips/fig-forth-for-6800/ Corsham Tech FIG-Forth 68 page]
 +
* [https://github.com/douggilliland/Retro-Computers/tree/master/6800/fig-FORTH/figForth_SmithBUG FIGFORTH GitHub]
 +
** Enter command to srecord loader
 +
<pre>
 +
&
 +
</pre>
 +
* Using TermTerm, File, Send File
 +
* Send [https://github.com/douggilliland/Retro-Computers/blob/master/6800/fig-FORTH/figForth_SmithBUG/fig-FORTH_6800.s19 fig-FORTH_6800.s19]
 +
* Type S9 to exit srecord loader
 +
* Type J 1000 to jump to address 0x1000
 +
* Responds with
 +
 +
<pre>
 +
Forth-68
 +
1 1 + . 2  OK
 +
</pre>
 +
 +
* [https://github.com/douggilliland/Retro-Computers/tree/master/6800/fig-FORTH#readme FIG-Forth-68 Commands]
 +
** Type '''VLIST''' to get list OG built-ins
 +
 +
<pre>
 +
TASK  FORTH  NOOP  VLIST  TRIAD  INDEX  LIST
 +
?  .  D.  D.R  .R  #S  #  SIGN  #>  <#
 +
SPACES  WHILE  ELSE  IF  REPEAT  AGAIN  END
 +
UNTIL  +LOOP  LOOP  DO  THEN  ENDIF  BEGIN
 +
BACK  FORGET  '  R/W  HI  LO  BLOCK_READ
 +
BLOCK_WRITE  ?DISC  -->  LOAD  MESSAGE  .LINE
 +
(LINE)  BLOCK  BUFFER  DR1  DR0  EMPTY-BUFFERS
 +
UPDATE  +BUF  PREV  USE  DABS  ABS  M/MOD
 +
*/  */MOD  MOD  /  /MOD  *  S->D  COLD  ABORT
 +
QUIT  (  DEFINITIONS  VOCABULARY  IMMEDIATE
 +
INTERPRET  DLITERAL  LITERAL  [COMPILE]  CREATE
 +
ID.  ERROR  (ABORT)  -FIND  NUMBER  (NUMBER)
 +
LABD______________  PAD  HOLD  BLANKS  ERASE
 +
FILL      QUERY  EXPECT  ?STACK  ."  (.")
 +
-TRAILING  TYPE  COUNT  DOES>  <BUILDS  ;CODE
 +
(:CODE)  DECIMAL  HEX  SMUDGE  ]  [  COMPILE
 +
?LOADING  ?CSP  ?PAIRS  ?EXEC  ?COMP  ?ERROR
 +
!CSP  PFA  NFA  CFA  LFA  LATEST  TRAVERSE
 +
-DUP  MAX  MIN  SPACE  ROT  >  <  =  -
 +
C,  ,  ALLOT  HERE  2+  1+  COLUMNS  HLD
 +
R#  CSP  FLD  DPL  BASE  STATE  CURRENT  CONTEXT
 +
OFFSET  SCR  OUT  IN  BLK  VOC-LINK  DP  FENCE
 +
WARNING  WIDTH  TIB  R0  S0  +ORIGIN  B/SCR
 +
B/BUF  LIMIT  FIRST  BL  3  2  1  0  USER
 +
VARIABLE  CONSTANT  ;  :  C!  !  C@  @  TOGGLE
 +
+!  DUP  SWAP  DROP  OVER  DMINUS  MINUS
 +
D+  +  0<  0=  R  R>  >R  LEAVE  ;S  RP!
 +
SP!  SP@  XOR  OR  AND  U/  U*  CMOVE  CR
 +
?TERMINAL  KEY  EMIT  ENCLOSE  (FIND)  DIGIT
 +
I  (DO)  (+LOOP)  (LOOP)  0BRANCH  BRANCH
 +
EXECUTE  LIT    OK
 +
</pre>
 +
 +
=== SMITHBUG and FIGFORTH in ROM ===
 +
 +
* Combines SMITHBUG and FIGFORTH in ROM
 +
** [https://raw.githubusercontent.com/douggilliland/Retro-Computers/master/6800/LB-6802/SMITHBUG_FORTH/SMITHBUG_FORTH_SIMPLE-FC.hex Combined Source code]
 +
** SMITHBUG in ROM from 0xC000-0xCFFF
 +
** FIGFORTH in ROM from 0xD000-0xEFFF
 +
** Vectors are at top of ROM from 0xFFF8-0xFFFF
 +
* Fixes in FIG-Forth to get it to run from ROM
 +
** The comments in the file indicated it could be run from ROM but the stack pointed to ORIG which is in ROM
 +
** Fixed addresses of stack and I/O pointer to get it to work from ROM
 +
** Type '''VLIST''' to get list OG built-ins
 +
* [https://github.com/land-boards/lb-boards/tree/master/RetroCPUs/SIMPLE-6802/SOFTWARE/SMITHBUG_FORTH SMITHBUG and FIGFORTH in ROM GitHub]
 +
* Assemble
 +
<PRE>
 +
A68 SMITHBUG_FORTH_SIMPLE-6802_C000.ASM -l SMITHBUG_FORTH_SIMPLE-6802_C000.LST -s SMITHBUG_FORTH_SIMPLE-6802_C000.S
 +
6800/6801 Cross-Assembler (Portable) Ver 3.5!
 +
Copyright (c) 1985 William C. Colley, III
 +
fixes for LCC/Windows and improvement by HRJ Aug 26 2019
 +
A68 source_file | -l list_file | | -o/-s object_file |
 +
 +
No Errors
 +
</PRE>
 +
 +
* Edit out RAM at top
 +
* Make hex file
 +
 +
<PRE>
 +
srec_cat SMITHBUG_FORTH_SIMPLE-6802_C000.s -offset - -minimum-addr SMITHBUG_FORTH_SIMPLE-6802_C000.s -o SMITHBUG_FORTH_SIMPLE-FC.hex -Intel
 +
srec_cat: SMITHBUG_FORTH_SIMPLE-6802_C000.s: 1: warning: no header record
 +
srec_cat: SMITHBUG_FORTH_SIMPLE-6802_C000.s: 1: warning: no header record
 +
</PRE>
 +
 +
* Boots to SMITHBUG
 +
* Type J D000 to run Fig-Forth '''or'''
 +
* Type 4 to run Forth
 +
** Type '''VLIST''' to get list OG built-ins
 +
 +
=== TinyBASIC ===
 +
 +
* [https://github.com/land-boards/lb-boards/tree/master/RetroCPUs/SIMPLE-6802/SOFTWARE/TinyBASIC TinyBASIC GitHub]
 +
* [https://github.com/douggilliland/Retro-Computers/blob/master/6800/TinyBASIC/Pittman-TinyBASIC/README.mediawiki TINY BASIC User Manual]
 +
** [https://github.com/douggilliland/Retro-Computers/blob/master/6800/TinyBASIC/Pittman-TinyBASIC/TINY%20BASIC%20User%20Manual.pdf TINY BASIC User Manual PDF]
 +
* Load using &
 +
** Character/line delays 1 mSec (TeraTerm)
 +
* Send [https://github.com/land-boards/lb-boards/blob/master/RetroCPUs/SIMPLE-6802/SOFTWARE/TinyBASIC/TB_6800.s TB_6800.s file]
 +
* Run using J 0100
  
 
== Mechanicals ==
 
== Mechanicals ==
Line 100: Line 264:
  
 
== Checkout ==
 
== Checkout ==
 +
 +
=== Rev 2 Updates ===
 +
 +
* Add "STATUS" LED
 +
* Add bulk cap, C6
 +
 +
[[FILE:LB-6802-01_FRONT_REV2(BLK).png]]
  
 
=== Rev 1 ===
 
=== Rev 1 ===
Line 105: Line 276:
 
* Power supply noise trips voltage monitor
 
* Power supply noise trips voltage monitor
 
** Change C2 capacitor to 100 uF
 
** Change C2 capacitor to 100 uF
 +
* [[LB-BKOUT-01#NOP_Tester|NOP Tester]] worked
 +
* Card works
 +
** Runs SmithBug
 +
** Runs TinyBASIC
 +
* Add LED
 +
** Add wire U1-33 to U2-11 (CPUD0)
 +
** Add LED U2-15 1.8K plus resistor to GND
 +
** Test LED
 +
*** In SmithBug
 +
*** E F000 01
 +
*** E F000 00
 +
*** LED will go ON/OFF
 +
 +
[[FILE:LB-6802-01_P1090722-720PX.jpg]]
  
 
== Assembly Sheet ==
 
== Assembly Sheet ==
 +
 +
=== Rev 2 ===
 +
 +
* [http://land-boards.com/LB-6802-01/LB-6802-01_Rev2_ibom.html Interactive BOM]
 +
 +
=== Rev 1 ===
  
 
* [http://land-boards.com/LB-6802-01/LB-6802-01_Rev1_ibom.html Interactive BOM]
 
* [http://land-boards.com/LB-6802-01/LB-6802-01_Rev1_ibom.html Interactive BOM]

Latest revision as of 17:53, 17 September 2024

LB-6802-01 P1090720-720PX.jpg

Features

  • 68B02 CPU
    • 2 MHz clock
    • MC6802 is fully compatible with MC6800 but without messy two-phase clocking

Memory Map

  • 0x0000-0x7FFF 32KB SRAM
  • 0x8000-0xBFFF Serial (68B50 ACIA)
  • 0xC000-0xFFFF 16KB EPROM

Design

CPU

LB-6802-01 CPU.PNG

MC6800 Block Diagram

Mc6800 processor diagram.png

Bus Timing

Timing 68B02.PNG

Power Supervisor/Reset

LB-6802-01 RESET PWR SUPER.PNG

PLD

LB-6802-01 PLD.PNG

PLD Listing

Name       LB-6802-01_PLD;
Partno     ATF16V8B;
Date       09/11/24;
Revision   01;
Designer   DOUG G;
Company    LAND BOARDS LLC;
Assembly   LB680201_U2;
Location   Rustbelt, US;
Device     G16V8;

/*
*/


/* Control inputs */
PIN    1   = CLK;
PIN    2   = CPUA12;
PIN    3   = CPUA13;
PIN    4   = CPUA14;
PIN    5   = CPUA15;
PIN    6   = CPUREAD;
PIN    7   = VPB;		/* Added as wire on Rev 1 PCB	*/
PIN    8   = VPA;
PIN    9   = VDA;
PIN    11  = D0;

/* Address Decode and Chip Select outputs */
PIN    12  = !ROMCS;
PIN    13  = !IOCS;
PIN    14  = !MEMRD;
PIN    15  = LED;
PIN    16  = !RAMCS;
PIN    18  = RDY;

ROMCS = CPUA15 & CPUA14 & CPUREAD;

RAMCS = !CPUA15 & CPUREAD		/* 0x0000-0x7FFF 32KB SRAM	*/
#       !CPUA15 & !CPUREAD & VPB;

IOCS = CPUA15 & !CPUA14 & !CPUA13 &  CPUREAD	 /* 0x8000-0x9FFF Serial (ACIA)	*/
#      CPUA15 & !CPUA14 & !CPUA13 & !CPUREAD & VPB;

RDY = VPB;

MEMRD = CPUREAD;

LED =  CPUA15 & CPUA14 & !CPUREAD & VPB& D0
#      LED & !(CPUA15 & CPUA14 & !CPUREAD & VPB);

Backplane Connector

LB-6802-01 BKPL.PNG

Software

Builds

  • SMITHBUG is a debugger similar to MIKBUG
    • Examine/Edit memory
    • Disassembly code
    • Download S record (V2)
    • Run code
  • FIG-Forth - Forth language
  • Combined SMITHBUG and FIG-Forth build

Building Code

  • Uses a68 assembler
    • Command line makes S-Record output
  • Use srec_cat to shift 4K from EPROM absolute address 0x0000-0x0FFF to 0xF000-0xFFFF as HEX file
  • Or shift in the EPROM programmer

SmithBUG Builds for LB-6802-01 CPU Card

4KB Build

A68 SMITHBUG_SIMPLE-6802_F000.ASM -l SMITHBUG_SIMPLE-6802_F000.LST -s SMITHBUG_SIMPLE-6802_F000.S
srec_cat SMITHBUG_SIMPLE-6802_F000.s -offset - -minimum-addr SMITHBUG_SIMPLE-6802_F000.s -o smithbug_F000.hex -Intel

SmithBUG Commands

;	4	FORTH
;	V	VIEW MEMORY
;	E	CHANGE MEMORY
;	I	FILL MEMORY
;	M	MOVE MEMORY
;	D	DISASSEMBLE CODE
;	G	GO TO PROGRAM
;	R	PRINT
;	@	ASCII CONVERSION
;	H	PRINTER ON
;	J	JUMP TO TARGET PROGRAM
;	F	FIND 
;	Q	HARDWARE LOCATION
;	T	TRACE PROGRAM
;	1	BREAKPOINT ONE
;	2	BREAKPOINT TWO
;	K	CONTINUE AFTER BREAK
;	&	S1 LOAD PROGRAM
;	*	HARDWARE LOCATION (TBA)
;	O	ECHO ON
;	N	ECHO OFF

FIGFORTH in RAM

&
  • Using TermTerm, File, Send File
  • Send fig-FORTH_6800.s19
  • Type S9 to exit srecord loader
  • Type J 1000 to jump to address 0x1000
  • Responds with
Forth-68
1 1 + . 2  OK

TASK   FORTH   NOOP   VLIST   TRIAD   INDEX   LIST
?   .   D.   D.R   .R   #S   #   SIGN   #>   <#
SPACES   WHILE   ELSE   IF   REPEAT   AGAIN   END
UNTIL   +LOOP   LOOP   DO   THEN   ENDIF   BEGIN
BACK   FORGET   '   R/W   HI   LO   BLOCK_READ
BLOCK_WRITE   ?DISC   -->   LOAD   MESSAGE   .LINE
(LINE)   BLOCK   BUFFER   DR1   DR0   EMPTY-BUFFERS
UPDATE   +BUF   PREV   USE   DABS   ABS   M/MOD
*/   */MOD   MOD   /   /MOD   *   S->D   COLD   ABORT
QUIT   (   DEFINITIONS   VOCABULARY   IMMEDIATE
INTERPRET   DLITERAL   LITERAL   [COMPILE]   CREATE
ID.   ERROR   (ABORT)   -FIND   NUMBER   (NUMBER)
LABD______________   PAD   HOLD   BLANKS   ERASE
FILL      QUERY   EXPECT   ?STACK   ."   (.")
-TRAILING   TYPE   COUNT   DOES>   <BUILDS   ;CODE
(:CODE)   DECIMAL   HEX   SMUDGE   ]   [   COMPILE
?LOADING   ?CSP   ?PAIRS   ?EXEC   ?COMP   ?ERROR
!CSP   PFA   NFA   CFA   LFA   LATEST   TRAVERSE
-DUP   MAX   MIN   SPACE   ROT   >   <   =   -
C,   ,   ALLOT   HERE   2+   1+   COLUMNS   HLD
R#   CSP   FLD   DPL   BASE   STATE   CURRENT   CONTEXT
OFFSET   SCR   OUT   IN   BLK   VOC-LINK   DP   FENCE
WARNING   WIDTH   TIB   R0   S0   +ORIGIN   B/SCR
B/BUF   LIMIT   FIRST   BL   3   2   1   0   USER
VARIABLE   CONSTANT   ;   :   C!   !   C@   @   TOGGLE
+!   DUP   SWAP   DROP   OVER   DMINUS   MINUS
D+   +   0<   0=   R   R>   >R   LEAVE   ;S   RP!
SP!   SP@   XOR   OR   AND   U/   U*   CMOVE   CR
?TERMINAL   KEY   EMIT   ENCLOSE   (FIND)   DIGIT
I   (DO)   (+LOOP)   (LOOP)   0BRANCH   BRANCH
EXECUTE   LIT    OK

SMITHBUG and FIGFORTH in ROM

  • Combines SMITHBUG and FIGFORTH in ROM
    • Combined Source code
    • SMITHBUG in ROM from 0xC000-0xCFFF
    • FIGFORTH in ROM from 0xD000-0xEFFF
    • Vectors are at top of ROM from 0xFFF8-0xFFFF
  • Fixes in FIG-Forth to get it to run from ROM
    • The comments in the file indicated it could be run from ROM but the stack pointed to ORIG which is in ROM
    • Fixed addresses of stack and I/O pointer to get it to work from ROM
    • Type VLIST to get list OG built-ins
  • SMITHBUG and FIGFORTH in ROM GitHub
  • Assemble
A68 SMITHBUG_FORTH_SIMPLE-6802_C000.ASM -l SMITHBUG_FORTH_SIMPLE-6802_C000.LST -s SMITHBUG_FORTH_SIMPLE-6802_C000.S
6800/6801 Cross-Assembler (Portable) Ver 3.5!
Copyright (c) 1985 William C. Colley, III
fixes for LCC/Windows and improvement by HRJ Aug 26 2019
A68 source_file | -l list_file | | -o/-s object_file |

No Errors
  • Edit out RAM at top
  • Make hex file
srec_cat SMITHBUG_FORTH_SIMPLE-6802_C000.s -offset - -minimum-addr SMITHBUG_FORTH_SIMPLE-6802_C000.s -o SMITHBUG_FORTH_SIMPLE-FC.hex -Intel
srec_cat: SMITHBUG_FORTH_SIMPLE-6802_C000.s: 1: warning: no header record
srec_cat: SMITHBUG_FORTH_SIMPLE-6802_C000.s: 1: warning: no header record
  • Boots to SMITHBUG
  • Type J D000 to run Fig-Forth or
  • Type 4 to run Forth
    • Type VLIST to get list OG built-ins

TinyBASIC

Mechanicals

LB-6802-01 CAD Rev1.PNG

Checkout

Rev 2 Updates

  • Add "STATUS" LED
  • Add bulk cap, C6

LB-6802-01 FRONT REV2(BLK).png

Rev 1

  • Power supply noise trips voltage monitor
    • Change C2 capacitor to 100 uF
  • NOP Tester worked
  • Card works
    • Runs SmithBug
    • Runs TinyBASIC
  • Add LED
    • Add wire U1-33 to U2-11 (CPUD0)
    • Add LED U2-15 1.8K plus resistor to GND
    • Test LED
      • In SmithBug
      • E F000 01
      • E F000 00
      • LED will go ON/OFF

LB-6802-01 P1090722-720PX.jpg

Assembly Sheet

Rev 2

Rev 1

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