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Added wrappers for the kernal functions

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1587 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2002-11-22 22:16:20 +00:00
parent df42c5943d
commit b7e7864fc5
28 changed files with 595 additions and 113 deletions
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23
libsrc/plus4/Makefile
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@ -19,8 +19,29 @@ OBJS = _scrsize.o \
conio.o \
cputc.o \
crt0.o \
kacptr.o \
kbasin.o \
kbhit.o \
kernal.o \
kbsout.o \
kchkin.o \
kciout.o \
kckout.o \
kclall.o \
kclose.o \
kclrch.o \
kiobase.o \
klisten.o \
kload.o \
kopen.o \
krdtim.o \
kreadst.o \
ksave.o \
ksetlfs.o \
ksetnam.o \
ksettim.s \
ktalk.o \
kunlsn.o \
kuntlk.o \
randomize.o \
readjoy.o \
tgi_mode_table.o

13
libsrc/plus4/cgetc.s
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@ -9,9 +9,10 @@
.include "plus4.inc"
; --------------------------------------------------------------------------
.segment "LOWMEM" ; Accesses the ROM - must go into low mem
_cgetc: lda KEY_COUNT ; Get number of characters
ora FKEY_COUNT ; Or with number of function key chars
bne L2 ; Jump if there are already chars waiting
@ -44,7 +45,9 @@ L1: lda KEY_COUNT
sta TED_CURSLO ; Cursor off
sta TED_CURSHI
L2: jsr KBDREAD ; Read char and return in A
L2: sta ENABLE_ROM ; Bank in the ROM
jsr KBDREAD ; Read char and return in A (ROM routine)
sta ENABLE_RAM ; Reenable the RAM
ldx #0
rts
@ -56,6 +59,8 @@ L2: jsr KBDREAD ; Read char and return in A
.constructor initkbd
.destructor donekbd
.code ; Can go into the normal code segment
.proc initkbd
ldy #15
@ -68,13 +73,17 @@ L2: jsr KBDREAD ; Read char and return in A
.endproc
.segment "LOWMEM" ; Accesses the ROM - must go into low mem
.proc donekbd
ldx #$39 ; Copy the original function keys
sta ENABLE_ROM ; Bank in the ROM
@L1: lda FKEY_ORIG,x
sta FKEY_SPACE,x
dex
bpl @L1
sta ENABLE_RAM ; Bank out the ROM
rts
.endproc

11
libsrc/plus4/clrscr.s
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@ -8,7 +8,16 @@
.include "plus4.inc"
_clrscr = CLRSCR
.segment "LOWCODE" ; Must go into low memory
.proc _clrscr
sta ENABLE_ROM ; Enable the ROM
jsr CLRSCR ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

76
libsrc/plus4/crt0.s
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@ -7,61 +7,71 @@
.export _exit
.import initlib, donelib
.import push0, _main, zerobss
.import MEMTOP, RESTOR, BSOUT, CLRCH
.import __IRQFUNC_TABLE__, __IRQFUNC_COUNT__
.include "zeropage.inc"
.include "plus4.inc"
; ------------------------------------------------------------------------
; BASIC header with a SYS call
; Place the startup code in a special segment to cope with the quirks of
; plus/4 banking.
.code
.segment "STARTUP"
.org $0FFF
.word Head ; Load address
Head: .word @Next
.word 1000 ; Line number
.byte $9E,"4109" ; SYS 4109
.byte $00 ; End of BASIC line
@Next: .word 0 ; BASIC end marker
.reloc
; ------------------------------------------------------------------------
; Actual code
sei ; No interrupts since we're banking out the ROM
sta ENABLE_RAM
ldx #zpspace-1
L1: lda sp,x
sta zpsave,x ; save the zero page locations we need
dex
bpl L1
sta ENABLE_ROM
cli
; Close open files
jsr CLRCH
jsr $FFCC ; CLRCH
; Switch to second charset
lda #14
jsr BSOUT
jsr $FFD2 ; BSOUT
; Setup the IRQ vector in the banked RAM and switch off the ROM
sei ; No ints, handler not yet in place
sta ENABLE_RAM
lda #<IRQ
sta $FFFE ; Install interrupt handler
lda #>IRQ
sta $FFFF
cli ; Allow interrupts
; Clear the BSS data
jsr zerobss
; Save system stuff and setup the stack
; Save system stuff and setup the stack. The stack starts at the top of the
; usable RAM.
tsx
stx spsave ; save system stk ptr
sec
jsr MEMTOP ; Get top memory
cpy #$80 ; We can only use the low 32K :-(
bcc MemOk
ldy #$80
ldx #$00
MemOk: stx sp
sty sp+1 ; set argument stack ptr
lda #<$FD00
sta sp
lda #>$FD00
sta sp+1
; Call module constructors
@ -92,11 +102,41 @@ L2: lda zpsave,x
dex
bpl L2
; Reset changed vectors
; Enable the ROM, reset changed vectors and return to BASIC
jmp RESTOR
sta ENABLE_ROM
jmp $FF8A ; RESTOR
; ------------------------------------------------------------------------
; IRQ handler
.segment "LOWCODE"
IRQ: pha
txa
pha
tsx ; Get the stack pointer
lda $0103,x ; Get the saved status register
tax
lda #>irqret ; Push new return address
pha
lda #<irqret
pha
txa
pha
sta ENABLE_ROM ; Switch to ROM
jmp ($FFFE) ; Jump to kernal irq handler
irqret: sta ENABLE_RAM ; Switch back to RAM
pla
tax
pla
rti
; ------------------------------------------------------------------------
; Data
.data
zpsave: .res zpspace

20
libsrc/plus4/kacptr.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; ACPTR replacement function
;
.export ACPTR
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc ACPTR
sta ENABLE_ROM ; Enable the ROM
jsr $FFA5 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kbasin.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; BASIN replacement function
;
.export BASIN
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc BASIN
sta ENABLE_ROM ; Enable the ROM
jsr $FFCF ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kbsout.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; BSOUT replacement function
;
.export BSOUT
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc BSOUT
sta ENABLE_ROM ; Enable the ROM
jsr $FFD2 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kchkin.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; CHKIN replacement function
;
.export CHKIN
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc CHKIN
sta ENABLE_ROM ; Enable the ROM
jsr $FFC6 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kciout.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; CIOUT replacement function
;
.export CIOUT
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc CIOUT
sta ENABLE_ROM ; Enable the ROM
jsr $FFA8 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kckout.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; CKOUT replacement function
;
.export CKOUT
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc CKOUT
sta ENABLE_ROM ; Enable the ROM
jsr $FFC9 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kclall.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; CLALL replacement function
;
.export CLALL
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc CLALL
sta ENABLE_ROM ; Enable the ROM
jsr $FFE7 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kclose.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; CLOSE replacement function
;
.export CLOSE
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc CLOSE
sta ENABLE_ROM ; Enable the ROM
jsr $FFC3 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kclrch.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; CLRCH replacement function
;
.export CLRCH
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc CLRCH
sta ENABLE_ROM ; Enable the ROM
jsr $FFCC ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

90
libsrc/plus4/kernal.s
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@ -1,90 +0,0 @@
;
; Ullrich von Bassewitz, 19.11.2002
;
; Plus/4 kernal functions
;
.export CINT
.export IOINIT
.export RAMTAS
.export RESTOR
.export VECTOR
.export SETMSG
.export SECOND
.export TKSA
.export MEMTOP
.export MEMBOT
.export SCNKEY
.export SETTMO
.export ACPTR
.export CIOUT
.export UNTLK
.export UNLSN
.export LISTEN
.export TALK
.export READST
.export SETLFS
.export SETNAM
.export OPEN
.export CLOSE
.export CHKIN
.export CKOUT
.export CLRCH
.export BASIN
.export BSOUT
.export LOAD
.export SAVE
.export SETTIM
.export RDTIM
.export STOP
.export GETIN
.export CLALL
.export UDTIM
.export SCREEN
.export PLOT
.export IOBASE
;-----------------------------------------------------------------------------
; All functions are available in the kernal jump table
CINT = $FF81
IOINIT = $FF84
RAMTAS = $FF87
RESTOR = $FF8A
VECTOR = $FF8D
SETMSG = $FF90
SECOND = $FF93
TKSA = $FF96
MEMTOP = $FF99
MEMBOT = $FF9C
SCNKEY = $FF9F
SETTMO = $FFA2
ACPTR = $FFA5
CIOUT = $FFA8
UNTLK = $FFAB
UNLSN = $FFAE
LISTEN = $FFB1
TALK = $FFB4
READST = $FFB7
SETLFS = $FFBA
SETNAM = $FFBD
OPEN = $FFC0
CLOSE = $FFC3
CHKIN = $FFC6
CKOUT = $FFC9
CLRCH = $FFCC
BASIN = $FFCF
BSOUT = $FFD2
LOAD = $FFD5
SAVE = $FFD8
SETTIM = $FFDB
RDTIM = $FFDE
STOP = $FFE1
GETIN = $FFE4
CLALL = $FFE7
UDTIM = $FFEA
SCREEN = $FFED
PLOT = $FFF0
IOBASE = $FFF3

20
libsrc/plus4/kiobase.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; IOBASE replacement function
;
.export IOBASE
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc IOBASE
sta ENABLE_ROM ; Enable the ROM
jsr $FFF3 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/klisten.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; LISTEN replacement function
;
.export LISTEN
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc LISTEN
sta ENABLE_ROM ; Enable the ROM
jsr $FFB1 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kload.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; LOAD replacement function
;
.export LOAD
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc LOAD
sta ENABLE_ROM ; Enable the ROM
jsr $FFD5 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kopen.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; OPEN replacement function
;
.export OPEN
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc OPEN
sta ENABLE_ROM ; Enable the ROM
jsr $FFC0 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

22
libsrc/plus4/krdtim.s Normal file
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@ -0,0 +1,22 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; RDTIM replacement function
;
.export RDTIM
.include "plus4.inc"
; Read the clock from the zero page to avoid banking in the ROM
.proc RDTIM
sei ; No interrupts
lda TIME+2
ldx TIME+1
ldy TIME ; Read the time
cli ; Allow interrupts
rts ; Return to caller
.endproc

18
libsrc/plus4/kreadst.s Normal file
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@ -0,0 +1,18 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; READST replacement function
;
.export READST
.include "plus4.inc"
; Read the status byte from the zero page instead of banking in the ROM
.proc READST
lda ST ; Load status
rts ; Return to caller
.endproc

20
libsrc/plus4/ksave.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; SAVE replacement function
;
.export SAVE
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc SAVE
sta ENABLE_ROM ; Enable the ROM
jsr $FFD8 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/ksetlfs.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; SETLFS replacement function
;
.export SETLFS
.include "plus4.inc"
; Write directly to the zero page to avoid banking in the ROM
.proc SETLFS
sta LFN
stx DEVNUM
sty SECADR
rts ; Return to caller
.endproc

62
libsrc/plus4/ksetnam.s Normal file
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@ -0,0 +1,62 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; SETNAM replacement function
;
.export SETNAM
.include "plus4.inc"
; This function is special in that the name must reside in low memory,
; otherwise it is not accessible by the ROM code.
.segment "LOWCODE" ; Must go into low memory
.proc SETNAM
; Limit the length of the name and store it into the zero page
cmp #16+1
bcc @L1
lda #16 ; Use a maximum of 16 chars
@L1: sta FNAM_LEN
; Check if we have to copy the name to low memory
cmp #$00 ; Length zero?
beq @L3 ; Yes: Copying not needed
cpy #$00 ; Is the name in low memory?
bpl @L3 ; Yes: Copying not needed
; Store the length and the pointer to the name
stx TMPPTR
sty TMPPTR+1 ; Store pointer to name in TMPPTR
; Copy the given name into DOS_FN1
ldy #$00
@L2: lda (TMPPTR),y
sta DOS_FN1,y
iny
cpy FNAM_LEN
bne @L2
; Load the new parameters for the low memory buffer
ldx #<DOS_FN1
ldy #>DOS_FN1
; Instead of banking in the ROM, store the values directly into the zeropage
@L3: stx FNAM_ADR
sty FNAM_ADR+1
; Return to caller
rts
.endproc

22
libsrc/plus4/ksettim.s Normal file
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@ -0,0 +1,22 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; SETTIM replacement function
;
.export SETTIM
.include "plus4.inc"
; Set the clock by writing directly to zero page to avoid banking in the ROM
.proc SETTIM
sei ; No interrupts
sta TIME+2
stx TIME+1
sty TIME ; Set the time
cli ; Allow interrupts
rts ; Return to caller
.endproc

20
libsrc/plus4/ktalk.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; TALK replacement function
;
.export TALK
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc TALK
sta ENABLE_ROM ; Enable the ROM
jsr $FFB4 ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kunlsn.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; UNLSN replacement function
;
.export UNLSN
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc UNLSN
sta ENABLE_ROM ; Enable the ROM
jsr $FFAE ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

20
libsrc/plus4/kuntlk.s Normal file
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@ -0,0 +1,20 @@
;
; Ullrich von Bassewitz, 22.11.2002
;
; UNTLK replacement function
;
.export UNTLK
.include "plus4.inc"
.segment "LOWCODE" ; Must go into low memory
.proc UNTLK
sta ENABLE_ROM ; Enable the ROM
jsr $FFAB ; Call the ROM routine
sta ENABLE_RAM ; Switch back to RAM
rts ; Return to caller
.endproc

11
libsrc/plus4/plus4.inc
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@ -6,18 +6,22 @@
; ---------------------------------------------------------------------------
; Zero page, Commodore stuff
TMPPTR = $22 ; Temporary ptr used by BASIC
ST = $90 ; IEC status byte
TIME = $A3 ; 60HZ clock
FNAM_LEN = $AB ; Length of filename
LFN = $AC ; Logical file number
SECADR = $AD ; Secondary address
DEVNUM = $AE ; Device number
FNAM_ADR = $AF ; Pointer to filename for OPEN
KEY_COUNT = $EF ; Number of keys in input buffer
CURS_X = $CA ; Cursor column
CURS_Y = $CD ; Cursor row
SCREEN_PTR = $C8 ; Pointer to current char in text screen
CRAM_PTR = $EA ; Pointer to current char in color RAM
DOS_FN1 = $25E ; DOS filename buffer #1
DOS_FN1LEN = $26E ; DOS filename length #1
CHARCOLOR = $53B
FKEY_COUNT = $55D ; Characters for function key
FKEY_SPACE = $55F ; Function key definitions
@ -63,5 +67,10 @@ TED_HPOS = $FF1E
TED_ROMSEL = $FF3E
TED_RAMSEL = $FF3F
; ---------------------------------------------------------------------------
; RAM/ROM selection addresses
ENABLE_ROM = $FF3E
ENABLE_RAM = $FF3F