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petflash.asm
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;---------------------------------------------------------
;
; PET ROM/RAM Flasher Software
;
; Basic 2 Beta , 11. April 2005
;
;---------------------------------------------------------
;
;
; Flash Buffer : $3000 - $8000
;
; Please report bugs to : [email protected]
;
;---------------------------------------------------------
!to "petflash.prg"
; Basicstart
*= $0400
!byte $00,$0c,$08,$0a,$00,$9e,$31,$30,$33,$39,$00,$00,$00,$00
; main
*=$040f
;--------------------------------------------------
chrout = $ffd2 ; print a char on screen
get = $ffe4 ; to get pressed keys
screen = $8000 ; Screen RAM
;--------------------------------------------------
;File
BUF =$2f00
FNADR =$DA
FNLEN =$D1
STATUS =$96
FA =$D4
SA =$D3
;---------------------------------------------------
;ROM>RAM Copy
source_lo = $0a
source_hi = $0b
target_lo = $0c
target_hi = $0d
;--------------------------------------------------
bas1 = $e180 ; "***" in power on message (Basic 1)
bas2 = $e1c4 ; "###" in power on message (Basic 2)
;--------------------------------------------------
; dummy vars for menu itmes
;-------------------------------------------------
dummy1 = $03fb ; Option address
dummy2 = $03fc ; Chiptype: 0=at29c512/at29c010
dummy3 = $03fd ; Firmware adress
dummy4 = $03fe ; ROM: 0=Firmware<>1=Option
dummy5 = $03ff ; 0 Bin<> 1 Prg :
;--------------------------------------------------
lda #0
sta dummy1
sta dummy2
sta dummy3
sta dummy4
sta dummy5
jsr sc
jmp detect ; show detected machine (basic,mem, crtc)
main
taster jsr taste
jmp taster
;----------------------------------------------------------
taste : jsr get ; get keyboard
cmp #67 ; "C"
beq c_type ;
cmp #70 ; "F"
beq firm_option_j ; use jumppoint
cmp #65 ; "A"
beq options_j ;
cmp #81 ; "Q"uit
beq end ;
cmp #83 ; "S"ave
beq save_j ;
cmp #87 ; "S"ave
beq flash_j ;
cmp #76 ; "L"oad
beq load_j
cmp #77 ; "M"ove ROM to RAM
beq romram_j
cmp #82 ; "R"OM - Firmware/Option
beq rom_firm_j ;
bne taste
rts
;--------------------------------------------------
end jmp exit_tool
;----------------------------------------------------------
c_type lda dummy2
cmp #$01
beq ctyp2
cmp #$02
beq ctyp0
cmp #$00
beq ctyp1
ldx #0
ctyp0 lda ct1,x
sta 33059+123,x
inx
cpx #17
bne ctyp0
lda #0
sta dummy2
rts
ctyp1 ldx #0
ctyp1a lda ct2,x
sta 33059+123,x
inx
cpx #17
bne ctyp1a
lda #1
sta dummy2
rts
ctyp2 ldx #0
ctyp2a lda ct3,x
sta 33059+123,x
inx
cpx #17
bne ctyp2a
lda #2
sta dummy2
rts
;--------------------------------------------
; jumppoints - we are to far away
;--------------------------------------------
firm_option_j jsr firm_option
rts
options_j jsr option
rts
rom_firm_j jsr rom_firm
rts
load_j jsr setload
rts
save_j jmp setsave
romram_j jmp initrampump
flash_j jmp setflash
;----------------------------------------------------------
rom_firm lda dummy4
cmp #$01
bne wf1
ldx #0
rof2 lda rf1,x
sta 33139,x
inx
cpx #15
bne rof2
lda #0
sta dummy4
ldx #00
fw1 lda firm_adr,x ; show firmware address
sta 33099,x
inx
cpx #4
bne fw1
rts
wf1 ldx #0 ; switch to option
rof1 lda rf2,x ; Option
sta 33139,x
inx
cpx #15
bne rof1
lda #1
sta dummy4
ldx #00
op1 lda opt_adr1,x ; show option address 1
sta 33099,x
inx
cpx #4
bne op1
rts
;----------------------------------------------------------
firm_option lda dummy5
cmp #$01
bne w1
ldx #0
fol2 lda fo1,x
sta 33019,x
inx
cpx #7
bne fol2
lda #0
sta dummy5
rts
w1 ldx #0
fol1 lda fo2,x
sta 33019,x
inx
cpx #7
bne fol1
lda #1
sta dummy5
rts
option lda dummy4 ; firmware choosen
cmp #0
bne option2 ; no
lda dummy3
cmp #$01
beq optf1
optf2 lda firm_adr1,x ; show firmware address
sta 33099,x
inx
cpx #4
bne optf2
lda #$01
sta dummy3 ; feed dummy
rts
ldx #00
optf1 lda firm_adr,x ; show firmware address
sta 33099,x
inx
cpx #4
bne optf1
lda #$00
sta dummy3 ; feed dummy
rts
;----------------------------------------------------------
option2 lda dummy1
cmp #$01
beq opt2
cmp #$02
beq opt0
cmp #$00
beq opt1
ldx #0
opt0 lda opt_adr1,x
sta 33099,x
inx
cpx #5
bne opt0
lda #0
sta dummy1
rts
opt1 ldx #0
opt1a lda opt_adr2,x
sta 33099,x
inx
cpx #5
bne opt1a
lda #1
sta dummy1
rts
opt2 ldx #0
opt2a lda opt_adr3,x
sta 33099,x
inx
cpx #5
bne opt2a
lda #2
sta dummy1
rts
;--------------------------------------------------
; Build main screen
;--------------------------------------------------
sc lda #14 ; set charmode
sta 59468
lda #147 ; clear screen
jsr chrout
jsr tx ; build main screen
lda #240
sta r2+1
sta s1+1
jsr tx
lda #224
sta r2+1
sta s1+1
inc r2+2
inc s1+2
jsr tx
rts
tx ldy #00 ; counter for text
r2 lda $0e00,y ; point text
s1 sta screen,y ; drop some text on the screen
iny
cpy #240 ;
bne r2 ;
rts ; end
;--------------------------------------------------
;
; DANGEROUS "Borg part" ;)
;
; Detecting Basic, Memory and CRTC - self-reconfiguring code
;
;--------------------------------------------------
detect
ldx #$00 ; Basic 1 detect
l1 lda bas1,x ; test for "***" in $e180 : "*** Commodore Basic ***"
cmp #$2a
beq g1
inx
cpx #2
bne l1
ldx #$00 ; Basic 2 detect
l2 lda bas2,x ; test for "###" in $e1c4 : "### Commodore Basic ###"
cmp #$23
beq g5
inx
cpx #2
bne l2
ldx #00
l4 lda $dea4,x ; Basic 4 detect
cmp basic4,x
bne l5
inx
cpx #29
bne l4
;-------------------------------------
; compare editor rom - crtc version ?
;-------------------------------------
jsr memtest
l10 ldx #00
crt lda crtc,x
cmp $e000,x
bne l9
inx
cpx #8
bne crt
;-------------------------------------
; insert (CBM 8000) in Text
;-------------------------------------
ldx #00
l7 lda crtmes,x
sta pettext+18,x
inx
cpx #10
bne l7
jmp l6
;-------------------------------------
; insert (CBM 4000) in Text
;-------------------------------------
l9 ldx #00
l8 lda crtno,x
sta pettext+18,x
inx
cpx #10
bne l8
;-------------------------------------
; tool setup and configure output routine
;-------------------------------------
l6 lda #$4a ; set (q)uit for basic 4
sta end+1
lda #$b7
sta end+2
lda #52 ; Basic 4 detected
sta g4+1 ; modify routine
jsr g2 ; and drop text in screenram
jmp main
;--------------------------------------------------
l5 ldy #$00 ; Basic 1 or 2 not detected-unknown, maybe third party or Basic 4.0 machine
r1 lda unktext,y ;
jsr chrout ; drop some text on the screen
iny
cpy #39 ; 40 chars
bne r1 ; finished ? else loop again.
jmp main
;--------------------------------------------------
g5 jsr bas2mem
jmp g6
;--------------------------------------------------
g1 lda #49
g3 sta pettext+6 ; insert "1" in text
lda #$20 ; set cursor to line 20 : dez. 33568 - $8320
cr1 sta 224
lda #$83
cr2 sta 225
jsr petmem
jsr tx1 ; and drop message on the screen
jmp main
;--------------------------------------------------
g2 jsr memtest ; Basic 4 Memtest
g6 lda #196 ; modify addresses for basic 4
sta cr1+1
lda #197
sta cr2+1
g4 lda #50 ; insert "2" in text
jmp g3 ; and use last procedure
;--------------------------------------------------
tx1 ldy #$00 ; counter for text
tx2 lda pettext,y ; point text
sta $8320,y ; drop some text on the screen
iny
cpy #39 ; 40 chars
bne tx2 ; finished ? else loop again.
rts ; end
;----------------------------------------------------
; Memtest cbm + pet
;----------------------------------------------------
memtest lda 51
cmp #63 ; check for 16K
bne l11
mem1 lda #49
sta pettext+29 ; "1"
lda #54
sta pettext+30 ; "6"
l11 lda 51
cmp #127 ; check for 32K
bne memex
mem2 lda #51
sta pettext+29 ; "3"
lda #50
sta pettext+30 ; "2"
memex lda #75
sta pettext+31 ; "K"
rts
petmem lda 133 ; old pet mem test
cmp #32 ; check for 8K
bne pmem1
lda #56
sta pettext+30 ; "8"
jmp memex
pmem1 lda 133
cmp #64 ; check for 16K
bne pmem2
jmp mem1
pmem2 lda 133
cmp #128 ; check for 32K
bne memex
jmp mem2
bas2mem lda 51
cmp #32 ; "8"
bne bas2m2
lda #56
sta pettext+30 ;
jmp memex
bas2m2 lda 51
cmp #64 ; "16"
bne bas2m3
jmp mem1
bas2m3 lda 51
cmp #128 ; "32"
bne memex
jmp mem2
;-------------------------------------------------------------------------
romramcopy sei
ldx #00
ldy #00
s_lo lda #03
sta source_lo
s_hi lda #00
sta source_hi
t_lo lda #00
sta target_lo
t_hi lda #30
sta target_hi
repump ldy #00
pump lda (source_lo),Y
sta (target_lo),Y
iny
bne pump
inc source_hi
inc target_hi
inx
pcounter cpx #04
bne repump
cli
rts
;----------------------------------------------------------------------------
initrampump lda dummy4
cmp #00
beq firmpump
cmp #01
beq optionpump
optionpump lda dummy1
cmp #01
beq opta000
cmp #00
beq opt9000
cmp #02
beq optb000
opt9000 lda #00 ; move Option ROM from $A000-AFFF to
sta s_lo+1 ; $3000 - 3FFF
sta t_lo+1 ; $00
lda #$30
sta t_hi+1 ; $90
lda #$90
sta s_hi+1
lda #16 ; 16*256 Bytes = 4KBytes
sta pcounter+1
lda #57
sta buffer2+12
optp_ex jsr romramcopy
jsr bufmsg2
jmp taster
optb000 lda #00
sta s_lo+1 ; $5000 - 5FFF
sta t_lo+1 ; $00
lda #$50
sta t_hi+1 ; $a0
lda #$b0
sta s_hi+1
lda #16 ; 16*256 Bytes = 4KBytes
sta pcounter+1
lda #66
sta buffer2+12
jmp optp_ex
opta000 lda #00
sta s_lo+1 ; $4000 - 4FFF
sta t_lo+1 ; $00
lda #$40
sta t_hi+1 ; $a0
lda #$a0
sta s_hi+1
lda #16 ; 16*256 Bytes = 4KBytes
sta pcounter+1
lda #65
sta buffer2+12
jmp optp_ex
;-----------------------------------------------------------
firmpump lda #67
sta irptx+1
lda dummy3
cmp #00
beq irp1
cmp #01
beq iramp1
irp1 lda #$c0 ; $c000
sta s_hi+1
lda #$00
sta s_lo+1
sta t_lo+1
lda #$30 ; Buffer $3000>
sta t_hi+1
irp2 lda #64
sta pcounter+1 ; copy 16K
jsr romramcopy
irptx LDA #67
STA buffer1+10
jsr bufmsg
jmp taster
iramp1 lda #$b0 ; $b000
sta irp1+1 ; reconfig and use last procedure
lda #80
sta irp2+1
LDA #66
STA irptx+1
jmp irp1
bufmsg ldy #00
bmsg_a lda buffer1,y
sta $8170+251,y
iny
cpy #16
bne bmsg_a
rts
bufmsg2 ldy #00
bmsg_2a lda buffer2,y
sta $8170+251,y
iny
cpy #16
bne bmsg_2a
rts
buffer1 !PET "firmware $0000 "
buffer2 !PET "option rom $0000"
;------------------------------------------------------------
; Menu-items, text ...
;------------------------------------------------------------
firm_adr !PET "$c000"
firm_adr1 !PET "$b000"
;--------------------------------------------------
opt_adr1 !PET "$9000"
opt_adr2 !PET "$a000"
opt_adr3 !PET "$b000"
;--------------------------------------------------
ct1 !PET "at29c512/at29c010"
ct2 !PET "at29c020/at29c040"
ct3 !PET "at29c256 "
;--------------------------------------------------
mr1 !PET "OFF/on"
mr2 !PET "off/ON"
;--------------------------------------------------
rf1 !PET "FIRMWARE/option" ; dummy = 1
rf2 !PET "firmware/OPTION" ; dummy = 0
;--------------------------------------------------
fo1 !PET "BIN/prg" ;
fo2 !PET "bin/PRG" ;
;--------------------------------------------------
pettext !PET "basic detected "
unktext !PET "basic unknown. "
;--------------------------------------------------
;
;
;----- ----;
;
;
;
;
; Free memory from $0900 - $0dff for further expansions ;
;
;
;
;----- ----;
*=$0e00
!PET " flash programmer for cbm pet "
!PET " "
!PET " "
!PET " "
!PET " options: "
!PET " "
!PET " (f)ormat BIN/prg "
!PET " "
!PET " (a)ddress $c000 "
!PET " (r)om FIRMWARE/option "
!PET " (c)hiptype : at29c512/at29c010 "
!PET " (m)ove rom to ram "
!PET " (w) FLASH "
!PET " (l)oad (s)ave "
!PET " "
!PET " buffer($3000) : EMPTY "
!PET " "
!PET " (q)uit program "
!PET " "
!PET " "
;----------------------------------------------------
; some text
;----------------------------------------------------
crtmes !PET "(CBM 8000)"
crtno !PET "(CBM 4000)"
;--------------------------------------------------
; bytes for comparing
;--------------------------------------------------
basic4 !byte $2A,$2A,$2A,$20,$43,$4f,$4D,$4D ;*** comm ; $dea4
!byte $4F,$44,$4F,$52,$45,$20,$42,$41 ;odore ba
!byte $53,$49,$43,$20,$34,$2E,$30,$20 ;sic 4.0
!byte $2A,$2A,$2A,$0D,$0D,$00 ;***...
crtc !byte $4C,$4B,$E0,$4C,$A7,$E0,$4C,$16,$E1 ; editor rom $e000 (cbm 8000)
;--------------------------------------------------------------
; Filehandling Basic 2 : Load ($3000) Save (Firmware or Option)
;--------------------------------------------------------------
;LOAD
load jsr msg
lda #$70+12 ; set cursor to line 20 : dez. 33568 - $8320
cr3 sta 196
lda #$83
cr4 sta 197
INIT10 LDA #<BUF
STA FNADR
LDA #>BUF
STA FNADR+1 ;PLACE FOR FILE NAME
LDA #8
STA FA ;DEVICE #8
LDX #0 ;INPUT FILE NAME FROM SCREEN TO BUF
INIT20 JSR $FFCF
CMP #$D
BEQ INIT30
STA BUF,X
INX
BNE INIT20
INIT30 STX FNLEN
LDA #$D
JSR $FFD2 ;ECHO CR
LDA FNLEN
BNE INIT40 ;NAME WAS NOT NULL
RTS
INIT40 lda #$00
sta STATUS
lda #$08
sta FA ; secaddr
lda #$60
sta SA ; priaddr
lda SA
JSR $F466 ; Open ; JSR $F466 ; Open
JSR $F0B6 ; Talk
LDA SA
JSR $F128
lolo lda #$00 ; Load to $3000
STA $FB
lohi lda #$30
STA $FC
JSR $F355 ;$F355 ;
bufmsg3 ldy #00
bmsg_3a lda buffer3,y
sta $8170+251,y
iny
cpy #16
bne bmsg_3a
rts
buffer3 !PET "loaded from disk"
;--------------------------------------------------------
msg ldy #00
msg_a lda MSG1,y
sta $8370,y
iny
cpy #39
bne msg_a
rts
msg2 ldy #00
msg2_a lda #32
sta $8370,y
iny
cpy #39
bne msg2_a
rts
MSG1 !PET "FILENAME : "
;--------------------------------------------------------
;SAVE
save jsr msg
lda #$70+12 ; set cursor to line 20 : dez. 33568 - $8320
cr5 sta 196
lda #$83
cr6 sta 197
INIT50 LDA #<BUF
STA FNADR
LDA #>BUF
STA FNADR+1 ;PLACE FOR FILE NAME
LDA #8
STA FA ;DEVICE #8
LDX #0 ;INPUT FILE NAME FROM SCREEN TO BUF
INIT60 JSR $FFCF
CMP #$D
BEQ INIT70
STA BUF,X
INX
BNE INIT60
INIT70 STX FNLEN
LDA #$D
JSR $FFD2 ;ECHO CR
LDA FNLEN
BNE INIT80 ;NAME WAS NOT NULL
RTS
INIT80 lda #$08
sta FA ; secaddr
lda #$60
sta SA ; priaddr
slo lda #$00
sta $fb
shi lda #$30
sta $fc
slo1 lda #$00
sta $c9
shi1 lda #$40
sta $ca
JSR $F466 ;A5 ; Open
JSR $F0B6 ; Talk
JSR $F6A4 ; Save
JSR msg
bufmsg4 ldy #00
bmsg_4a lda buffer4,y
sta $8170+251,y
iny
cpy #16
bne bmsg_4a
rts
buffer4 !PET " saved on disk "
;-------------------------------------------------------------------------
; Check for Firmware or Option and Address
;
; Option ROM buffer : $3000>$3fff - $4000>$4fff - $5000>$5fff
; Content : $9000>$9fff - $a000>$afff - $b000>$bfff
; dummy1 : #$00 #$01 - #$02
;
;-------------------------------------------------------------------------
setsave lda dummy4 ; firmware =0 / option = 1
cmp #01
bne firmsave
lda dummy1
cmp #01 ; $a000
bne opts1
lda #$40 ; $a000 : located in buffer from $4000-4fff
sta shi+1
lda #$4f ; $4fff
sta shi1+1
lda #$ff
sta slo1+1
jmp opts_ex
opts1 lda dummy1
cmp #02
bne opts2
lda #$50 ; $b000 : located in buffer from $5000-5fff
sta shi+1
lda #$5f ; $5fff
sta shi1+1
lda #$ff
sta slo1+1
jmp opts_ex
opts2 lda #$30 ; $9000 : located in buffer from $3000-3fff
sta shi+1
lda #$3f ; $5fff
sta shi1+1
lda #$ff
sta slo1+1
opts_ex jsr save
jmp taster
;
; Firmware
;
firmsave lda dummy3 ; Firmware = 01: $c000 / 00: $b000
cmp #01
bne firms1
lda #$80
sta shi1+1
jsr save
jmp taster
firms1 Lda #$70 ; $B000
sta shi1+1
jsr save
jmp taster
;-------------------------------------------------------------------------
; Check for Firmware or Option and Address
;
; Option ROM buffer : $3000>$3fff - $4000>$4fff - $5000>$5fff
; Content : $9000>$9fff - $a000>$afff - $b000>$bfff
; dummy1 : #$00 #$01 - #$02
;
;-------------------------------------------------------------------------
setload lda dummy4 ; firmware =0 / option = 1
cmp #01
bne firmload
lda dummy1
cmp #01 ; $a000
bne lopts1
lda #$40 ; $a000 : located in buffer from $4000-4fff
sta lohi+1
lda #$00
sta lolo+1
jmp lopts_ex
lopts1 lda dummy1
cmp #02
bne lopts2
lda #$50 ; $b000 : located in buffer from $5000-5fff
sta lohi+1
lda #$00 ; $5fff
sta lolo+1
jmp lopts_ex
lopts2 lda #$30 ; $9000 : located in buffer from $3000-3fff
sta lohi+1
lda #$00 ; $5fff
sta lolo+1
lopts_ex jsr load
jmp taster
;
; Firmware
;
firmload lda dummy3 ; Firmware = 01: $c000 / 00: $b000
cmp #01
bne lfirms1
lda #$30
sta lohi+1
jsr save
jmp taster
lfirms1 Lda #$30 ; $B000
sta lohi+1
jsr load
jmp taster
;----------------------------------------------------------------------------
; Flash routines
;----------------------------------------------------------------------------
setflash lda dummy4 ; firmware =0 / option = 1
cmp #00
beq firmflash
lda dummy1
cmp #00
beq optfl2
cmp #01
beq optfl0
cmp #02
beq optfl1
optfl0 lda #$00
sta source+1
sta target+1
lda #$40 ; $a000 option ROM located at $4000>
sta source+2
lda #$A0
sta target+2
jmp optf_ex
optfl1 lda #$00
sta source+1
sta target+1
lda #$50 ; $B000 option ROM located at $5000>
sta source+2
lda #$B0
sta target+2
jmp optf_ex
optfl2 lda #$00
sta source+1
sta target+1
lda #$30 ; $9000 option ROM located at $3000>
sta source+2
lda #$90
sta target+2
optf_ex lda #$10 ; fix flash-routine for 4K-ROM
sta start1+1
jsr start ; start flashing
jmp taster
;
; Firmware
;
firmflash lda dummy3 ; Firmware = 00: $c000 / 01: $b000
cmp #01
beq firmf1
lda #$00
sta source+1
lda #$00
sta target+1
lda #$30 ; $C000 ROM located at $3000>
sta source+2
lda #$C0
sta target+2
lda #$40
sta start1+1
jsr start
jmp taster
firmf1 lda #$50
sta start1+1
lda #$00
sta source+1
lda #$00
sta target+1
lda #$30 ; $b000 ROM located at $3000>
sta source+2
lda #$B0
sta target+2
jsr start
jmp taster
start
lda dummy5 ; check for bin =0 / prg =1
cmp #00
beq start1 ; bin , start with actual addresses
lda #02 ; prg : fix start-address to skip load-addr.
sta source+1
start1 ldx #$40
sei
prog lda #128
sta page+1
jsr wpflash
jsr pgmpage
jsr waitready
lda #0
sta page+1
jsr wpflash
jsr testio
jsr waitready
inc source+2
inc target+2
dex
bne prog
cli
jsr flmsg
rts
;load 128 bytes to page
pgmpage ldy #0
testio lda target+2
cmp #$f0
bcs source
cmp #$e8
bcs endprg
source lda $0000,y
target sta $0000,y
iny
page cpy #$80
bne source
endprg rts