;****************************************************************
;* *
;* CBIOSZ for CPM 2.2u1 *
;* *
;****************************************************************
;
;HISTORY:
;vs 0.9
;4/25/86 disassembled, cleaned up, rewritten, commented
; and zcpr3 and cursor, keyboard routines added
; still much not understood.. note several unknx
; (unknown) routines after months of stubborn
; hacking (and bludgeoning).. PLEASE send further
; improvements and commenting to:
; Will Ridenour
; 338 S. Campbell
; Macomb, Il 61455
; (309) 833-1109 (voice)
;
;NOTE: this cbios is experimental... been using it for
; weeks without problems or bugs (with ws, turbo, bds c
; assemblers, loaders, etc.) but since I'm on my own out
; here in the midwest, i have no beta testers.. use at
; your own risk and if you find bugs.. let me know or,
; even better, fix them and let me know what you did.
;
;FURTHER NOTE: I removed several routines from this bios that made
; bdos calls... I think they were a very half baked way to
; make a shell of the 2x's masmenu system.... since
; I never use the masmenu I haven't missed these routines
; ... if you want to put them back, you're on your own... but
; for god's sakes find a better way than putting bdos calls
; in the bios.
.z80 ;set up to compile with m80
aseg ;comment these lines out and cap
;pseudo -ops to use z80mr
;since no macros or maclibs can also use
;zasm or such as long as it's a z80 assembler
;may need to alter some syntax if not m80
;
;******* system location equates
;
boot equ 1
jbdos equ 5
bdloc equ 0D406h
ccp equ 0CC00h
bios equ 0E200h
iobyte equ 3 ;iobyte vector in page zero
duvct equ 4 ;default drive user vector
tpa equ 100h ;start of transient program area
;
;******* zcpr specific equates
; graf equ 4fh ;toggle byte for graphics (not implemented)
whlb equ 04bh ;zcpr3 wheel byte
login equ 0f0h ;log in to disk A, user 15
;works nicely to keep all system files out
;in a15 and applications in a0
;
;*******
bitport equ 14h ;system select port
maxdsk equ 2 ;standard 2 floppy 2x kaypro
keyreg equ 5 ;keyboard register
quiet equ 8 ;value to turn off clicker
vidsel equ 1ch ;video select port
cureg equ 1fh ;video cursor register
cursor equ 0f000h ;nonblink block
cflag equ 0f1f0h ;this may be heresy-- using unused area
;of tcap to store cursor and keyboard
;values-- but its seems logical and it's
;going to waste otherwise -- unused area
;above bios stack at e6f0 may be used if
;you wish to remain orthadox
curs1 equ 0f1f1h ;values for cursor and keyboard stored
curs2 equ 0f1f2h ;under tcap
kybd equ 0f1f3h
;
org bios ;use 3d80 offset to load with ddt or zsid
;if not changing tpa size from 58k
;
;******** standard cpm bios jump table
jp cboot ;arrive here from cold boot
jwboot: jp wboot ;jump to warm boot
jp const ;jump to console status routine
jp conin ;console in
jp conout ;console out
jp list ;list out
jp punch ;punch out
jp reader ;reader in
jp home ;home disk routine
jp seldsk ;select disk routine
jp settrk ;set track routine
jp setsec ;set sector
jp setdma ;set default memory address
jp read ;read file
jp write ;write file
jp listst ;list status
jp sectran ;sector translate
;
const: call unkn2 ;can't comment on any of the following
call unkn3 ;these routines are mostly in rom
db 19h ;and don't have that sorted out yet
conin: call const
and a
db 28h
db 0fah
call unkn3
db 1ah
conout: push bc
call unkn2
pop bc
call unkn3
db 1bh
list: push bc
call unkn2
pop bc
call unkn3
db 1ch
punch: push bc
call unkn2
pop bc
call unkn3
db 1dh
reader: call unkn2
call unkn3
db 1eh
home: call unkn3
db 1fh
seldsk: call unkn3
db 20h
settrk: call unkn3
db 21h
setsec: call unkn3
db 22h
setdma: call unkn3
db 23h
read: call unkn1
call unkn3
db 24h
write: call unkn1
call unkn3
db 25h
listst: call unkn3
db 26h
sectran:
call unkn3
db 27h
;
unkn1: ld hl,2800h
ld (stak+2),hl
ld hl,800h
ld (stak+4),hl
ret
;
unkn2: ld a,(sizkbf)
and a
ret z
ld hl,(stak+2)
ld a,h
or l
ret z
dec hl
ld (stak+2),hl
ld a,h
or l
ret nz
ld hl,(stak+4)
ld (stak+2),hl
ld hl,0000h
ld (stak+4),hl
call unkn3
inc (hl)
ret
;
unkn3: pop hl
ld d,(hl)
ld (stak+6),sp
ld sp,stak+35h
ld hl,unkn4
push hl
jp gorom1
;
unkn4: ld sp,(stak+6)
ei
ret
;
ioconfg: ;configuration for iobyte
db 10011001b ;99h to support Kaypro internal modem
;set to 81h to use serial data port
;for external modem
db 0
;*** the following section may as well be in hebrew.. be glad if
;*** someone can sort it out
;
unkn5: db 18h,4ch ;can't guarantee that any of this is
db 0 ;right since i don't know what it's
ret nc ;doing yet... bytes are right but op codes
pop hl ;don't make any sense to me yet
jp pe,0000h
db 18h,4ch
db 0
ret po
pop hl
jp pe,0000h
db 18h,4ch
db 0
ret po
pop bc
ld l,b
db 0,0
dec b
dec b
db 0,0,0
;
; note: config will no longer work on this system to set number pad and
; vector keys... sorry... keybuf can hold approx 16 characters per
; number pad key +2 bytes at beginning for each key definition
; (1 for number of relative bytes to location of definition and 1
; for number of bytes in definition.. number of bytes comes first
; have defined zero key as 'HOLD, <RTN>' to show how to do your own.
; seems to me this is more space than needed but haven't been able
; to cut it down.. has something to do with values in indexed
; registers(ix iy), but haven't got that figured yet.. at any rate
; it seems that we could get more flexibility out of this with some
; thought.. would be very grateful for help
;
sizkbf: db 0ffh ;don't know if this is really size of key buf
;or just a coincidence.. changing it doesn't
;help in cutting size of buffer
keybuf: db 05h ;5 bytes in 'HOLD' <RTN>
db 1ch ;1ch bytes to location of definition
db 01h,20h,01h,21h,01h,22h,01h,23h,01h,24h,01h,25h
db 01h,26h,01h,27h,01h,28h,01h,29h,01h,2ah,01h,2bh
db 01h,2ch
db 'HOLD',0dh ;HOLD <RTN>
db '123456789-,',0dh,'.'
db 0ffh,0ffh ;end markers don't need to be there
;if nothing defined
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
;note: above buffer must be exactly 255 bytes long (incl defs) unless
; you figure out indexed registers... otherwise all key defs will be off
;
uparo: db 05h ;ws keys ^E
dnaro: db 18h ;^X
rtaro: db 13h ;^S
lfaro: db 04h ;^D
db 0f0h,0f1h,0f2h,0f3h,0f4h,0f5h,0f6h,0f7h,0f8h ;key vectors?
db 0f9h,0fah,0fbh,0fch,0fdh
keydef: db '1234567890-='
db '`qwy[]a;',27h,'\zm,./eiou!@#$%^&*()_+~'
db 'QWY{}A:"|ZM<>?EIOU'
;******************* cold boot routines
;
cboot: di ;disable interupts
ld sp,stak+35h
in a,(bitport)
and 7fh
out (bitport),a
ld d,36h
call gorom1
ld de,0054h
add hl,de
ex de,hl
ld ix,cbuf1
ld a,4
cloop1: ex af,af' ;cloop1 was 4 calls in a row to the same
ld bc,0002h ;subroutine called only here-- replaced with
ld a,2 ;a loop and put inline
;-- cloop1 and two are setting up
call cloop2 ;indexed registers, don't quite follow yet
add ix,bc ;cloop2 was the same called 2,
ld a,4 ;then 4 times, then 2 again.. made another
call cloop2 ;series of loops
add ix,bc
ld a,2
call cloop2
inc ix
ex de,hl
ld d,00h
ld e,(ix+0f9h)
add hl,de
ld e,(ix+0efh)
add hl,de
ex de,hl
ex af,af'
dec a
jr nz,cloop1
ld bc,cbuf1
ld d,36h
call gorom1
ld bc,unkn6
ld d,00h
call gorom1
ld bc,unkn5
ld d,2ah
call gorom1
ld bc,keybuf
ld d,2bh
call gorom1
ld a,login
ld (duvct),a
ld a,(ioconfg) ;this is also repeated in gocpm
ld (iobyte),a
ld d,28h
ld bc,signon ;uses a rom sub to print signon
call gorom1 ;msg... 'Kaypro CPM 2.2' in rom
;u1 added in bios, added z3 and
ei ;tpa size... considered adding
;date and my initials, but this
;is too far from finished to feel
;proprietary... add your own if
;it makes you feel good
;
;*********** routines to initialize system for zcpr3
;
ld hl,path
ld de,40h
ld bc,9 ;load path
ldir
;
ld a,0ffh
ld (whlb),a ;set wheel byte
;
;graphics byte set commented out because graphics don't seem to make any
;trouble on u1... will need to add 8th bit filter toggle to conout
;to use this
;
; ld a,0
; ld (graf),a ;set graphics byte
ld hl,0e700h ;initialize high memory buffers
ld a,17 ;zeroing all the way to f7ff
zloop: ld b,0ffh ;even tho top at f5.. doesn't
zero: ld (hl),0 ;add more than a milisecond to cboot
inc hl ;and keeps things clear and clean
djnz zero ;for planned additions
dec a
jr nz,zloop
ld hl,mcmd ;initialize multiple command
ld de,0f400h ;buffer and load cold boot command
ld bc,24
ldir
jr gocpm ;all done so get ready to go to cpm
;
;****************** warm boot routines
;
wboot: ld sp,stak+35h
; ld hl,0000h
; ld (buf1),hl ;what's going on here?
; ld (buf2),hl
ld d,29h
call gorom1
;
;***************** gocpm routines shared by warm and cold boot
;
gocpm:
;
;***************** cursor set routine
;
ld a,(cflag) ;check to see if cursor defs are loaded
cp 0
jr nz,stcurs ;yes so go set them
ld a,1 ;no so load then first
ld (cflag),a
ld hl,cursor
ld (curs1),hl
ld a,quiet
ld (kybd),a
stcurs: ld a,0ah ;select cursor reg 1
out (vidsel),a
ld a,(curs1)
out (cureg),a ;set blink and top of cursor
ld a,0bh ;select cursor reg 2
out (vidsel),a
ld a,(curs2) ;set bottom of cursor
out (cureg),a
;
;***************** routine to set keyboard to quiet (or not)
;
; note: this doesn't work as well as I'd like -- clicker is
; on at cold boot... shuts off after warm boot.. don't know why
; probably something in rom
;
ld a,(kybd)
out (keyreg),a
;
;***************** loading warm boot and bios jumps
;
ld a,0c3h
ld (0),a
ld (jbdos),a
ld hl,jwboot
ld (boot),hl
ld hl,bdloc
ld (6),hl
ld a,(duvct)
and 0fh ;zero out user nibble
cp maxdsk+1 ;make sure it's a valid disk
ld a,(duvct) ;get a fresh copy
jr c,gocp2 ;if ok then skip
xor a ;else default to disk a user 0
gocp2: ld (duvct),a ;reload
ld c,a ;pass du to ccp for action
ld sp,tpa ;set stack pointer for program exec
jp ccp ;note all entry is at 1st ccp entry
;seems to me that zcpr3 and multiple
;commands make 2 entry points meaningless
;
cloop2: ld l,(ix+00h)
ld h,(ix+01h)
add hl,de
ld (ix+00h),l
ld (ix+01h),h
add ix,bc
dec a
jr nz,cloop2
ret
;
unkn6: call gorom2 ;seems to me this can be cleaned up
db 01h ;with loop(s), but don't understand it
call gorom2 ;well enough yet
db 02h
call gorom2
db 03h
call gorom2
db 04h
call gorom2
db 05h
call gorom2
db 06h
call gorom2
db 07h
call gorom2
db 08h
call gorom2
db 0dh
call gorom2
db 0eh
call gorom2
db 0fh
call gorom2
db 10h
call gorom2
db 9h
call gorom2
db 0ah
call gorom2
db 0bh
call gorom2
db 0ch
call gorom2
db 11h
call gorom2
db 12h
;
gorom1: ld a,(iobyte)
ld h,a
in a,(bitport)
push af
set 7,a
out (bitport),a
ld a,h
call 004bh
pop bc
ex af,af' ;these were push and pop
;same space but faster
ld a,b
and 80h
ld b,a
in a,(bitport)
and 7fh
or b
out (bitport),a
ex af,af'
ret
;
gorom2: ex (sp),hl
ld (stak+07ah),sp
ld sp,stak+090h
push de
push bc
push af
push ix
push iy
ld d,(hl)
in a,(bitport)
ex af,af'
set 7,a
out (bitport),a
call 004bh
ex af,af'
and 0fch
ld d,a
in a,(bitport)
and 03h
or d
out (bitport),a
pop iy
pop ix
pop af
pop bc
pop de
ld sp,(stak+07ah)
pop hl
ei
reti
;
cbuf1: db 0,0
ld e,00h ;don't know what all this is
ld e,00h ;zsid and ddt alter some values in here
db 0,0,0,0
ld e,00h
inc hl
nop
dec b
nop
ld e,00h
ld e,00h
db 0,0,0
dec b
nop
dec b
db 0,0,0,0,0
dec b
nop
inc hl
nop
ld e,00h
dec b
nop
dec b
db 0,0,0,0
ld e,00h
ld e,00h
db 0,0,0,0
ld e,00h
inc hl
nop
dec b
nop
ld e,00h
ld e,00h
db 0,0,0
inc d
nop
inc d
db 0,0,0,0,0
inc d
nop
rla
nop
inc bc
nop
inc d
nop
inc d
;
db 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
signon: db 'u1z3 58k tpa',0dh,0ah,0
path: db 01h,0,01h,0fh,0,0,0,0,0
mcmd: db 04h,0f4h,0D0h,0,'LDR SYS.ENV;STARTUP',0
db 'END' ;end of bios
stak equ $+8 ;note this is bottom of stack-- top is
;0afh bytes higher (have compressed it much)
;may possibly be compressed further
;
end
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