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|
;
; $Id: ROMDump.s,v 1.4 1995/01/11 18:21:36 ecd Exp ecd $
;
; This file is part of ROMDump, a ROM dump utility for the HP48 Calculator.
; Copyright (C) 1994 Eddie C. Dost (ecd@dressler.de)
;
; This program is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License as published by
; the Free Software Foundation; either version 2 of the License, or
; (at your option) any later version.
;
; This program is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with this program; if not, write to the Free Software
; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
;
; Usage:
;
; (2: hxs, 1: hxs --> ) pop start address from level 2,
; pop end address from level 1, and dump
; ROM to the serial at 9600 baud using
; lines of form "aaaaa:hhhhhhhhhhhhhhhh\n\r"
; with 16 nibbles ROM data hhhhhhhhhhhhhhhh
; at address aaaaa.
;
; machine independent addresses (supported by HP)
;
AllowIntr equ $010e5
DisableIntr equ $01115
DOBINT equ $02911
DOCOL equ $02d9d
DOCODE equ $02dcc
SEMI equ $0312b
GETPTRLOOP equ $05143
SAVPTR equ $0679b
GETPTR equ $067d2
CK2NOLASTWD equ $18a8d
CKandDISPATCH1 equ $18fb2
VERSTRING equ $30794
PopASavptr equ $3251c
;
; machine independent addresses (NOT supported by HP)
;
POPHXS equ $53f8d
;
; machine dependent addresses
;
sx_GosubHidC equ $026bf
sx_prog_low equ $700f1 ; IRAMBUFF
sx_prog_high equ $f00f1 ; IRAMBUFF when RAM configured high
gx_GosubHidC equ $026ca
gx_prog_low equ $800f5 ; IRAMBUFF
gx_prog_high equ $c00f5 ; IRAMBUFF when RAM configured high
gx_LINECOUNT equ $8069a
;
; flags used
;
sGX equ 0
sHIGH equ 1
;
; begin off assembler code
;
textr "HPHP48-R"
dcr.5 DOCOL
dcr.5 CK2NOLASTWD
dcr.5 CKandDISPATCH1
dcr.5 DOBINT
dcr.5 $000bb
;
; only executed when (2: hxs, 1: hxs)
;
dcr.5 DOCOL
dcr.5 VERSTRING
dcr.5 DOCODE
code_start
dcr.5 code_end-code_start
jsr DisableIntr
;
; figure out version
;
jsr PopASavptr
move.1 #0, p
move.5 #24, c.p
add.a c, a
move.a a, d1
move.b (d1), a
move.2 #$4a, c.p ; 'J' == last version for S/SX
bclr #sGX, st
ble.b a, c, got_version
bset #sGX, st
got_version
bclr #sHIGH, st
;
; get arguments
;
jsr GETPTR
jsr POPHXS
move.1 #0, p
move.5 #$ffff0, c.p
and.a c, a
move.a a, r4
jsr GETPTR
jsr POPHXS
move.1 #0, p
move.5 #$ffff0, c.p
and.a c, a
move.a a, r3
;
; open IO
;
move.5 #$00110, d1
move.1 #8, a.p
move.1 a, (d1)
;
; set speed to 9600 baud
;
move.2 #$0d, d1
move.1 #6, a.p
move.1 a, (d1)
;
; dump ROM $00000 - $6ffff
;
dump_rom_0
move.a r3, a
move.5 #$6fff0, c.p
bgt.a a, c, dump_rom_7
move.a a, r1
move.a r4, c
move.a c, b
move.5 #$6fff0, c.p
ble.a b, c, end_addr_0
move.a c, b
end_addr_0
subr.a b, a
bcc continue_0
bra.3 dump_done
continue_0
move.a a, r2
bsr.3 prog_start
move.5 #$70000, a.p
move.a a, r3
;
; dump ROM $70000 - $7ffff
;
dump_rom_7
move.a r3, a
move.5 #$7fff0, c.p
bgt.a a, c, dump_done_7
bra.3 continue_7
dump_done_7
bbs #sGX, st, continue_8
bra.3 dump_done
continue_8
bra.3 dump_rom_8
continue_7
move.a a, r1
move.a r4, c
move.a c, b
move.5 #$7fff0, c.p
ble.a b, c, end_addr_7
move.a c, b
end_addr_7
subr.a b, a
bcc continue_7_2
bra.3 dump_done
continue_7_2
move.a a, r2
bbs #sGX, st, gx_dump_rom_7
bsr.3 copy_prog
move.5 #sx_prog_high, c.p
jsr sx_GosubHidC
bsr.3 copy_prog
bra.3 dump_done
gx_dump_rom_7
;
; unconfigure devices at 7e000 - 7ffff
;
move.5 #$7f000, c.p
uncnfg
move.5 #$7e000, c.p
uncnfg
bsr.3 prog_start
;
; reconfigure devices at 7e000 - 7ffff
;
move.5 #$ff000, c.p
config
move.5 #$7f000, c.p
config
move.5 #$ff000, c.p
config
move.5 #$7e000, c.p
config
move.5 #$80000, a.p
move.a a, r3
;
; dump ROM $80000 - $bffff
;
dump_rom_8
move.a r3, a
move.5 #$bfff0, c.p
bgt.a a, c, dump_rom_c
move.a a, r1
move.a r4, c
move.a c, b
move.5 #$bfff0, c.p
ble.a b, c, end_addr_8
move.a c, b
end_addr_8
subr.a b, a
bcc continue_8_2
bra.3 dump_done
continue_8_2
move.a a, r2
bsr.3 copy_prog
move.5 #gx_prog_high, c.p
jsr gx_GosubHidC
bsr.3 copy_prog
move.5 #$c0000, a.p
move.a a, r3
;
; dump ROM $c0000 - $fffff
;
dump_rom_c
move.a r3, a
move.a a, r1
move.a r4, c
move.a c, b
move.5 #$ffff0, c.p
ble.a b, c, end_addr_c
move.a c, b
end_addr_c
subr.a b, a
bcs dump_done
move.a a, r2
bsr.3 copy_prog
bset #sHIGH, st
jsr gx_prog_low
bsr.3 copy_prog
dump_done
;
; close IO
;
bsr.3 send_crnl
move.5 #$00110, d1
move.1 #0, a.p
move.1 a, (d1)
;
; back to RPL
;
jsr AllowIntr
jmp GETPTRLOOP
;
; exchange program with memory at address prog_low
;
copy_prog
move.a pc, c
prog_offset
move.5 #prog_start-prog_offset, a.p
add.a a, c
move.a c, d0
bbs #sGX, st, gx_addr
move.5 #sx_prog_low, d1
bra.3 sx_addr
gx_addr
move.5 #gx_prog_low, d1
sx_addr
move.5 #prog_end-prog_start, a.p
lsr.a #4, a
move.a a, b
copy_word
move.w (d0), a
move.w (d1), c
move.w c, (d0)
move.w a, (d1)
add.a #16, d0
add.a #16, d1
dec.a b
bcc copy_word
rtn
;
; this is the start of the actual dump routine
;
prog_start
bbc #sHIGH, st, skip_uncover_c
;
; uncover ROM at c0000 - fffff
;
move.5 #$7f000, d0
move.b (d0), c
move.5 #gx_LINECOUNT, d0
move.b (d0), c
bset #7, c
move.b c, (d0)
move.5 #$00128, d0
move.b c, (d0)
move.5 #$c0000, c.p
uncnfg
uncnfg
skip_uncover_c
;
; get start address and number of words
;
move.a r1, a
move.a a, d0
move.a r2, a
;
; dump the ROM
;
loop
move.a a, r0
bsr.3 send_addr
move.2 #$3a, c.p
bsr.3 send_char
move.w (d0), c
bsr.3 send_data
bsr.3 send_crnl
add.a #16, d0
move.a r0, a
sub.a #16, a
bcc loop
bbc #sHIGH, st, skip_cover_c
;
; reconfigure memory ports at c0000
;
move.5 #$c0000, c.p
config
config
config
config
move.5 #gx_LINECOUNT, d0
move.b (d0), c
bclr #7, c
move.b c, (d0)
move.5 #$00128, d0
move.b c, (d0)
move.5 #$7f040, d0
move.b (d0), c
skip_cover_c
rtn
;
; send data in C.W as hex characters
;
send_data
move.w c, b
move.2 #$0f, c.p
move.b c, d
bra.3 send_all
;
; send addr in D0 as hex characters
;
send_addr
exg.a a, d0
move.a a, c
exg.a a, d0
exg.1 p, c.4
exg.1 p, c.0
exg.1 p, c.4
exg.1 p, c.3
exg.1 p, c.1
exg.1 p, c.3
move.a c, b
move.2 #$04, c.p
move.b c, d
;
; send D.B many nibbles from B.W
;
send_all
clr.b c
move.p b, c
bsr.3 send_hex_nib
lsr.w #4, b
dec.b d
bcc send_all
rtn
;
; send "\n\r"
;
send_crnl
move.2 #$0d, c.p
bsr.3 send_char
move.2 #$0a, c.p
bsr.3 send_char
rtn
;
; send nibble in C.B as hex character
;
send_hex_nib
move.2 #$30, a.p
add.b a, c
move.2 #$39, a.p
ble.b c, a, send_char
move.2 #$07, a.p
add.b a, c
;
; send character in C.B
;
send_char
move.5 #$00112, d1
xmtrdy
move.1 (d1), a
bbs #0, a, xmtrdy
move.2 #$16, d1
move.b c, (d1)
rtn
prog_end
dcr.8 $00000000
dcr.8 $00000000
code_end
dcr.5 SEMI ; end of DISPATCH
dcr.5 SEMI ; end of program object
|
