mirror of https://github.com/mgcaret/rom4x.git
217 lines
5.4 KiB
ArmAsm
217 lines
5.4 KiB
ArmAsm
.psc02
|
|
.code
|
|
.include "iic.defs"
|
|
.org reset4x
|
|
stz power2 + rx_mslot ; action = normal boot
|
|
asl butn1 ; closed apple
|
|
bcs ckdiag
|
|
exitrst: jmp gorst4x ; return to RESET.X
|
|
; check to see if both apples are down
|
|
ckdiag: bit butn0 ; open apple
|
|
bmi exitrst ; return to RESET.X
|
|
; present menu because only closed apple is down
|
|
menu4x: jsr gobanner ; "Apple //c"
|
|
ldx #$00 ; menu start
|
|
jsr disp ; show it
|
|
jsr gtkey
|
|
cmp #$b0 ; "0"
|
|
bne ckkey1
|
|
ldx #$ff ; reset stack
|
|
txs
|
|
lda #>(monitor-1) ; monitor entry on stack
|
|
pha
|
|
lda #<(monitor-1)
|
|
pha
|
|
jmp swrts2 ; rts to enter monitor
|
|
ckkey1: cmp #$b2 ; "2"
|
|
beq doconf
|
|
cmp #$b4 ; "4"
|
|
bne ckkey2
|
|
doconf: jsr confirm
|
|
bne menu4x ; go back to menu4x
|
|
ckkey2: sec
|
|
sbc #$b0 ; ascii->number
|
|
bmi menu4x ; < 0 not valid
|
|
cmp #$08
|
|
bpl menu4x ; > 7 not valid
|
|
sta power2 + rx_mslot ; for boot4x
|
|
stz softev + 1 ; deinit coldstart
|
|
stz pwerdup ; ditto
|
|
bra exitrst
|
|
gtkey: lda #$60
|
|
sta ($0),y ; cursor
|
|
sta kbdstrb ; clr keyboard
|
|
kbdin: lda kbd ; get key
|
|
bpl kbdin
|
|
sta kbdstrb ; clear keyboard
|
|
sta ($0),y ; put it on screen
|
|
rts
|
|
; display message, input x = message start relative to msg1
|
|
disp: stz $0 ; load some safe defaults
|
|
lda #$04
|
|
sta $1
|
|
ldy #$0 ; needs to be zero
|
|
disp0: lda msg1,x ; get message byte
|
|
bne disp1 ; proceed if nonzero
|
|
rts ; exit if 0
|
|
disp1: inx ; next byte either way
|
|
cmp #$20 ; ' '
|
|
bcc disp2 ; start of ptr if < 20
|
|
eor #$80 ; invert high bit
|
|
sta ($0),y ; write to mem
|
|
inc $0 ; inc address low byte
|
|
bra disp0 ; back to the beginning
|
|
disp2: sta $1 ; write address high
|
|
lda msg1,x ; get it
|
|
sta $0 ; write address low
|
|
inx ; set next msg byte
|
|
bra disp0 ; back to the beginning
|
|
confirm: pha
|
|
ldx #(msg3-msg1) ; ask confirm
|
|
jsr disp
|
|
jsr gtkey
|
|
plx
|
|
ora #$20 ; to lower
|
|
cmp #$f9 ; "y"
|
|
php
|
|
txa
|
|
plp
|
|
rts
|
|
; msg format
|
|
; A byte < $20 indicates high byte of address.
|
|
; Next byte must be low byte of address. Anything
|
|
; else are characters to display and will have their
|
|
; upper bit inverted before being written to the screen.
|
|
msg1 = *
|
|
.byte $05,$06,"0 Monitor"
|
|
.byte $05,$86,"1 Reboot"
|
|
.byte $06,$06,"2 Zero RAM Card and Reboot"
|
|
.byte $06,$86,"3 Diagnostics"
|
|
.byte $07,$06,"4 RAM Card Diagnostics"
|
|
.byte $07,$86,"5 Boot SmartPort"
|
|
.byte $04,$2e,"6 Boot Int. 5.25"
|
|
.byte $04,$ae,"7 Boot Ext. 5.25"
|
|
.byte $07,$5f,"By M.G."
|
|
msg2: .byte $07,$db,"ROM 4X 01/01/17"
|
|
.byte $05,$ae,$00 ; cursor pos in menu
|
|
msg3: .byte $05,$b0,"SURE? ",$00
|
|
.res boot4x - *, 0
|
|
.org boot4x
|
|
jsr gobanner ; "Apple //c"
|
|
jsr rdrecov ; try to recover ramdisk
|
|
lda power2 + rx_mslot ; get action saved by reset4x
|
|
beq boot4 ; if zero, continue boot
|
|
ldx #(msg2-msg1) ; short banner offset
|
|
jsr disp ; display it
|
|
lda power2 + rx_mslot ; boot selection
|
|
btc2: cmp #$02 ; clear ramcard
|
|
bne btc3
|
|
jsr rdclear ; do clear
|
|
bra boot4
|
|
btc3: cmp #$03 ; Diags
|
|
bne btc4
|
|
jmp $c7c4
|
|
btc4: cmp #$04 ; RX diags
|
|
bne btc5
|
|
ldx #$ff
|
|
txs ; reset stack
|
|
jsr rdinit ; get x and y loaded
|
|
stx sl_devno ; diags need this
|
|
jsr testsize ; compute card size
|
|
lda #>(monitor-1) ; load "return" address
|
|
pha ; into stack so that we
|
|
lda #<(monitor-1) ; exit card test into
|
|
pha ; the monitor
|
|
lda numbanks,y ; get the card size in banks
|
|
bne dordiag ; do diag if memory present
|
|
jmp swrts2 ; otherwise jump to monitor
|
|
dordiag: jmp $db3a ; diags
|
|
;bra boot4
|
|
btc5: cmp #$05 ; boot smartport
|
|
beq boot5
|
|
btc6: cmp #$06 ; boot int drive
|
|
beq boot6
|
|
btc7: cmp #$07 ; boot ext drive
|
|
bne boot4 ; none of the above
|
|
; copy small routine to $800 to boot
|
|
; external 5.25
|
|
ldy #(bt4xend-bootext+1)
|
|
btc7lp: lda bootext,y
|
|
sta $800,y
|
|
dey
|
|
bpl btc7lp
|
|
lda #$08 ; copy done
|
|
bra bootsl
|
|
boot4: lda #rx_mslot ; boot slot 4
|
|
bra bootsl
|
|
boot5: lda #$c5 ; boot slot 5
|
|
bra bootsl
|
|
boot6: lda #$c6 ; boot slot 6
|
|
bootsl: ldx #$00 ; low byte of slot
|
|
bootadr: stx $0 ; store address
|
|
sta $1 ; return to bank 0 does jmp (0)
|
|
endbt4x: jmp gobt4x ; continue boot
|
|
rdrecov: jsr rdinit ; init ramcard
|
|
lda pwrup,y ; get power up flag
|
|
cmp #pwrbyte ; already initialized?
|
|
beq recovdn ; exit if initialized
|
|
jsr testsize ; does not wreck x or y
|
|
lda numbanks,y ; get discovered # banks
|
|
beq recovdn ; no mem
|
|
stz addrl,x ; set slinky address 0
|
|
stz addrm,x
|
|
stz addrh,x
|
|
lda data,x ; start check for bootable ramdisk
|
|
cmp #$01
|
|
bne recovdn ; not bootable
|
|
lda data,x ; next byte should be nonzero and not $ff
|
|
beq recovdn ; not bootable
|
|
cmp #$ff
|
|
beq recovdn ; not bootable
|
|
lda #pwrbyte
|
|
sta pwrup,y ; set power byte
|
|
lda #'R' ; tell user
|
|
sta $7d0 ; on screen
|
|
recovdn: rts
|
|
; zero ram card space
|
|
rdclear: jsr rdinit ; init ramcard
|
|
jsr testsize ; get size
|
|
lda numbanks,y ; # of 64Ks to write
|
|
beq clrdone ; no memory
|
|
lda #$c0 ; 'A' - 1
|
|
sta $400 ; upper left corner
|
|
stz addrl,x ; slinky address 0
|
|
stz addrm,x
|
|
stz addrh,x
|
|
clbnklp: inc $400 ; poor mans progress meter
|
|
ldy #$00
|
|
cl64klp: ldx #$00 ; loop for all pages in bank
|
|
cl256lp: txa ; loop for all bytes in page
|
|
ldx #rx_devno
|
|
stz data,x ; write a zero to card
|
|
tax
|
|
dex
|
|
bne cl256lp ; 256 byte loop
|
|
dey
|
|
bne cl64klp ; 64K loop
|
|
ldx #rx_mslot
|
|
dec numbanks,x
|
|
bne clbnklp ; if more banks
|
|
clrdone: ldx #rx_mslot
|
|
stz pwrup,x ; zero powerup byte
|
|
lda #$a0 ; ' '
|
|
sta $400 ; clear progress
|
|
rts
|
|
rdinit: bit rx_mslot*$100 ; activate registers
|
|
ldy #rx_mslot ; slot offset
|
|
ldx #rx_devno ; register offset
|
|
rts
|
|
; next is snippet of code to boot external 5.25
|
|
bootext: lda #$e0
|
|
ldy #$01
|
|
ldx #$60
|
|
jmp $c60b
|
|
bt4xend = *
|
|
|
|
|