MC68711E20CFNE3 Datasheet, PDF (222/242 Pages) –

Listing 3. MC68HC711E9 Bootloader ROM
Listing 3. MC68HC711E9 Bootloader ROM
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29 0008
30 000E
31 0016
32 0023
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34 0080
35
36 0028
37 002B
38 002D
39 002E
40 002F
41 003B
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43 0020
44 0001
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46
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49 B600
50 B7FF
51
****************************************************
* BOOTLOADER FIRMWARE FOR 68HC711E9 - 21 Aug 89
****************************************************
* Features of this bootloader are...
*
* Auto baud select between 7812.5 and 1200 (8 MHz)
* 0 - 512 byte variable length download
* Jump to EEPROM at $B600 if 1st download byte = $00
* PROGRAM - Utility subroutine to program EPROM
* UPLOAD - Utility subroutine to dump memory to host
* Mask I.D. at $BFD4 = $71E9
****************************************************
* Revision A -
*
* Fixed bug in PROGRAM routine where the first byte
* programmed into the EPROM was not transmitted for
* verify.
* Also added to PROGRAM routine a skip of bytes
* which were already programmed to the value desired.
*
* This new version allows variable length download
* by quitting reception of characters when an idle
* of at least four character times occurs
*
****************************************************
* EQUATES FOR USE WITH INDEX OFFSET = $1000
*
PORTD EQU $08
TCNT
EQU $0E
TOC1
EQU $16
TFLG1 EQU $23
* BIT EQUATES FOR TFLG1
OC1F
EQU $80
*
SPCR
EQU $28
(FOR DWOM BIT)
BAUD
EQU $2B
SCCR2 EQU $2D
SCSR
EQU $2E
SCDAT EQU $2F
PPROG EQU $3B
* BIT EQUATES FOR PPROG
ELAT
EQU $20
EPGM
EQU $01
*
* MEMORY CONFIGURATION EQUATES
*
EEPMSTR EQU $B600
Start of EEPROM
EEPMEND EQU $B7FF
End of EEPROM
*
M68HC11 Bootstrap Mode, Rev. 1.1
222
Freescale Semiconductor