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prog8/compiler/res/prog8lib/cx16/syslib.p8
Irmen de Jong e221d674d9 pcxviewer done
2020-12-13 01:32:03 +01:00

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; Prog8 definitions for the CommanderX16
; Including memory registers, I/O registers, Basic and Kernal subroutines.
;
; Written by Irmen de Jong (irmen@razorvine.net) - license: GNU GPL 3.0
;
; indent format: TABS, size=8
%target cx16
c64 {
; ---- kernal routines, these are the same as on the Commodore-64 (hence the same block name) ----
; STROUT --> use txt.print
; CLEARSCR -> use txt.clear_screen
; HOMECRSR -> use txt.plot
romsub $FF81 = CINT() clobbers(A,X,Y) ; (alias: SCINIT) initialize screen editor and video chip
romsub $FF84 = IOINIT() clobbers(A, X) ; initialize I/O devices (CIA, SID, IRQ)
romsub $FF87 = RAMTAS() clobbers(A,X,Y) ; initialize RAM, tape buffer, screen
romsub $FF8A = RESTOR() clobbers(A,X,Y) ; restore default I/O vectors
romsub $FF8D = VECTOR(uword userptr @ XY, ubyte dir @ Pc) clobbers(A,Y) ; read/set I/O vector table
romsub $FF90 = SETMSG(ubyte value @ A) ; set Kernal message control flag
romsub $FF93 = SECOND(ubyte address @ A) clobbers(A) ; (alias: LSTNSA) send secondary address after LISTEN
romsub $FF96 = TKSA(ubyte address @ A) clobbers(A) ; (alias: TALKSA) send secondary address after TALK
romsub $FF99 = MEMTOP(uword address @ XY, ubyte dir @ Pc) -> uword @ XY ; read/set top of memory pointer
romsub $FF9C = MEMBOT(uword address @ XY, ubyte dir @ Pc) -> uword @ XY ; read/set bottom of memory pointer
romsub $FF9F = SCNKEY() clobbers(A,X,Y) ; scan the keyboard
romsub $FFA2 = SETTMO(ubyte timeout @ A) ; set time-out flag for IEEE bus
romsub $FFA5 = ACPTR() -> ubyte @ A ; (alias: IECIN) input byte from serial bus
romsub $FFA8 = CIOUT(ubyte databyte @ A) ; (alias: IECOUT) output byte to serial bus
romsub $FFAB = UNTLK() clobbers(A) ; command serial bus device to UNTALK
romsub $FFAE = UNLSN() clobbers(A) ; command serial bus device to UNLISTEN
romsub $FFB1 = LISTEN(ubyte device @ A) clobbers(A) ; command serial bus device to LISTEN
romsub $FFB4 = TALK(ubyte device @ A) clobbers(A) ; command serial bus device to TALK
romsub $FFB7 = READST() -> ubyte @ A ; read I/O status word
romsub $FFBA = SETLFS(ubyte logical @ A, ubyte device @ X, ubyte address @ Y) ; set logical file parameters
romsub $FFBD = SETNAM(ubyte namelen @ A, str filename @ XY) ; set filename parameters
romsub $FFC0 = OPEN() clobbers(X,Y) -> ubyte @Pc, ubyte @A ; (via 794 ($31A)) open a logical file
romsub $FFC3 = CLOSE(ubyte logical @ A) clobbers(A,X,Y) ; (via 796 ($31C)) close a logical file
romsub $FFC6 = CHKIN(ubyte logical @ X) clobbers(A,X) -> ubyte @Pc ; (via 798 ($31E)) define an input channel
romsub $FFC9 = CHKOUT(ubyte logical @ X) clobbers(A,X) ; (via 800 ($320)) define an output channel
romsub $FFCC = CLRCHN() clobbers(A,X) ; (via 802 ($322)) restore default devices
romsub $FFCF = CHRIN() clobbers(X, Y) -> ubyte @ A ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
romsub $FFD2 = CHROUT(ubyte char @ A) ; (via 806 ($326)) output a character
romsub $FFD5 = LOAD(ubyte verify @ A, uword address @ XY) -> ubyte @Pc, ubyte @ A, ubyte @ X, ubyte @ Y ; (via 816 ($330)) load from device
romsub $FFD8 = SAVE(ubyte zp_startaddr @ A, uword endaddr @ XY) -> ubyte @ Pc, ubyte @ A ; (via 818 ($332)) save to a device
romsub $FFDB = SETTIM(ubyte low @ A, ubyte middle @ X, ubyte high @ Y) ; set the software clock
romsub $FFDE = RDTIM() -> ubyte @ A, ubyte @ X, ubyte @ Y ; read the software clock
romsub $FFE1 = STOP() clobbers(X) -> ubyte @ Pz, ubyte @ A ; (via 808 ($328)) check the STOP key (and some others in A)
romsub $FFE4 = GETIN() clobbers(X,Y) -> ubyte @Pc, ubyte @ A ; (via 810 ($32A)) get a character
romsub $FFE7 = CLALL() clobbers(A,X) ; (via 812 ($32C)) close all files
romsub $FFEA = UDTIM() clobbers(A,X) ; update the software clock
romsub $FFED = SCREEN() -> ubyte @ X, ubyte @ Y ; read number of screen rows and columns
romsub $FFF0 = PLOT(ubyte col @ Y, ubyte row @ X, ubyte dir @ Pc) -> ubyte @ X, ubyte @ Y ; read/set position of cursor on screen. Use txt.plot for a 'safe' wrapper that preserves X.
romsub $FFF3 = IOBASE() -> uword @ XY ; read base address of I/O devices
}
cx16 {
; 65c02 hardware vectors:
&uword NMI_VEC = $FFFA ; 6502 nmi vector, determined by the kernal if banked in
&uword RESET_VEC = $FFFC ; 6502 reset vector, determined by the kernal if banked in
&uword IRQ_VEC = $FFFE ; 6502 interrupt vector, determined by the kernal if banked in
; the sixteen virtual 16-bit registers
&uword r0 = $0002
&uword r1 = $0004
&uword r2 = $0006
&uword r3 = $0008
&uword r4 = $000a
&uword r5 = $000c
&uword r6 = $000e
&uword r7 = $0010
&uword r8 = $0012
&uword r9 = $0014
&uword r10 = $0016
&uword r11 = $0018
&uword r12 = $001a
&uword r13 = $001c
&uword r14 = $001e
&uword r15 = $0020
; VERA registers
const uword VERA_BASE = $9F20
&ubyte VERA_ADDR_L = VERA_BASE + $0000
&ubyte VERA_ADDR_M = VERA_BASE + $0001
&ubyte VERA_ADDR_H = VERA_BASE + $0002
&ubyte VERA_DATA0 = VERA_BASE + $0003
&ubyte VERA_DATA1 = VERA_BASE + $0004
&ubyte VERA_CTRL = VERA_BASE + $0005
&ubyte VERA_IEN = VERA_BASE + $0006
&ubyte VERA_ISR = VERA_BASE + $0007
&ubyte VERA_IRQ_LINE_L = VERA_BASE + $0008
&ubyte VERA_DC_VIDEO = VERA_BASE + $0009
&ubyte VERA_DC_HSCALE = VERA_BASE + $000A
&ubyte VERA_DC_VSCALE = VERA_BASE + $000B
&ubyte VERA_DC_BORDER = VERA_BASE + $000C
&ubyte VERA_DC_HSTART = VERA_BASE + $0009
&ubyte VERA_DC_HSTOP = VERA_BASE + $000A
&ubyte VERA_DC_VSTART = VERA_BASE + $000B
&ubyte VERA_DC_VSTOP = VERA_BASE + $000C
&ubyte VERA_L0_CONFIG = VERA_BASE + $000D
&ubyte VERA_L0_MAPBASE = VERA_BASE + $000E
&ubyte VERA_L0_TILEBASE = VERA_BASE + $000F
&ubyte VERA_L0_HSCROLL_L = VERA_BASE + $0010
&ubyte VERA_L0_HSCROLL_H = VERA_BASE + $0011
&ubyte VERA_L0_VSCROLL_L = VERA_BASE + $0012
&ubyte VERA_L0_VSCROLL_H = VERA_BASE + $0013
&ubyte VERA_L1_CONFIG = VERA_BASE + $0014
&ubyte VERA_L1_MAPBASE = VERA_BASE + $0015
&ubyte VERA_L1_TILEBASE = VERA_BASE + $0016
&ubyte VERA_L1_HSCROLL_L = VERA_BASE + $0017
&ubyte VERA_L1_HSCROLL_H = VERA_BASE + $0018
&ubyte VERA_L1_VSCROLL_L = VERA_BASE + $0019
&ubyte VERA_L1_VSCROLL_H = VERA_BASE + $001A
&ubyte VERA_AUDIO_CTRL = VERA_BASE + $001B
&ubyte VERA_AUDIO_RATE = VERA_BASE + $001C
&ubyte VERA_AUDIO_DATA = VERA_BASE + $001D
&ubyte VERA_SPI_DATA = VERA_BASE + $001E
&ubyte VERA_SPI_CTRL = VERA_BASE + $001F
; VERA_PSG_BASE = $1F9C0
; VERA_PALETTE_BASE = $1FA00
; VERA_SPRITES_BASE = $1FC00
; I/O
const uword via1 = $9f60 ;VIA 6522 #1
&ubyte d1prb = via1+0
&ubyte d1pra = via1+1
&ubyte d1ddrb = via1+2
&ubyte d1ddra = via1+3
&ubyte d1t1l = via1+4
&ubyte d1t1h = via1+5
&ubyte d1t1ll = via1+6
&ubyte d1t1lh = via1+7
&ubyte d1t2l = via1+8
&ubyte d1t2h = via1+9
&ubyte d1sr = via1+10
&ubyte d1acr = via1+11
&ubyte d1pcr = via1+12
&ubyte d1ifr = via1+13
&ubyte d1ier = via1+14
&ubyte d1ora = via1+15
const uword via2 = $9f70 ;VIA 6522 #2
&ubyte d2prb =via2+0
&ubyte d2pra =via2+1
&ubyte d2ddrb =via2+2
&ubyte d2ddra =via2+3
&ubyte d2t1l =via2+4
&ubyte d2t1h =via2+5
&ubyte d2t1ll =via2+6
&ubyte d2t1lh =via2+7
&ubyte d2t2l =via2+8
&ubyte d2t2h =via2+9
&ubyte d2sr =via2+10
&ubyte d2acr =via2+11
&ubyte d2pcr =via2+12
&ubyte d2ifr =via2+13
&ubyte d2ier =via2+14
&ubyte d2ora =via2+15
; ---- Commander X-16 additions on top of C64 kernal routines ----
; spelling of the names is taken from the Commander X-16 rom sources
; supported C128 additions
romsub $ff4a = close_all(ubyte device @A) clobbers(A,X,Y)
romsub $ff59 = lkupla(ubyte la @A) clobbers(A,X,Y)
romsub $ff5c = lkupsa(ubyte sa @Y) clobbers(A,X,Y)
romsub $ff5f = screen_set_mode(ubyte mode @A) clobbers(A, X, Y) -> ubyte @Pc
romsub $ff62 = screen_set_charset(ubyte charset @A, uword charsetptr @XY) clobbers(A,X,Y) ; incompatible with C128 dlchr()
; not yet supported: romsub $ff65 = pfkey() clobbers(A,X,Y)
romsub $ff6e = jsrfar()
romsub $ff74 = fetch(ubyte bank @X, ubyte index @Y) clobbers(X) -> ubyte @A
romsub $ff77 = stash(ubyte data @A, ubyte bank @X, ubyte index @Y) clobbers(X)
romsub $ff7a = cmpare(ubyte data @A, ubyte bank @X, ubyte index @Y) clobbers(X)
romsub $ff7d = primm()
; X16 additions
romsub $ff44 = macptr() clobbers(A,X,Y)
romsub $ff47 = enter_basic(ubyte cold_or_warm @Pc) clobbers(A,X,Y)
romsub $ff68 = mouse_config(ubyte shape @A, ubyte scale @X) clobbers (A, X, Y)
romsub $ff6b = mouse_get(ubyte zpdataptr @X) clobbers(A)
romsub $ff71 = mouse_scan() clobbers(A, X, Y)
romsub $ff53 = joystick_scan() clobbers(A, X, Y)
romsub $ff56 = joystick_get(ubyte joynr @A) -> ubyte @A, ubyte @X, ubyte @Y
romsub $ff4d = clock_set_date_time() clobbers(A, X, Y) ; args: r0, r1, r2, r3L
romsub $ff50 = clock_get_date_time() clobbers(A, X, Y) ; outout args: r0, r1, r2, r3L
; TODO specify the correct clobbers for alle these functions below, we now assume all 3 regs are clobbered
; high level graphics & fonts
romsub $ff20 = GRAPH_init() clobbers(A,X,Y) ; uses vectors=r0
romsub $ff23 = GRAPH_clear() clobbers(A,X,Y)
romsub $ff26 = GRAPH_set_window() clobbers(A,X,Y) ; uses x=r0, y=r1, width=r2, height=r3
romsub $ff29 = GRAPH_set_colors(ubyte stroke @A, ubyte fill @X, ubyte background @Y) clobbers (A,X,Y)
romsub $ff2c = GRAPH_draw_line() clobbers(A,X,Y) ; uses x1=r0, y1=r1, x2=r2, y2=r3
romsub $ff2f = GRAPH_draw_rect(ubyte fill @Pc) clobbers(A,X,Y) ; uses x=r0, y=r1, width=r2, height=r3, cornerradius=r4
romsub $ff32 = GRAPH_move_rect() clobbers(A,X,Y) ; uses sx=r0, sy=r1, tx=r2, ty=r3, width=r4, height=r5
romsub $ff35 = GRAPH_draw_oval(ubyte fill @Pc) clobbers(A,X,Y) ; uses x=r0, y=r1, width=r2, height=r3
romsub $ff38 = GRAPH_draw_image() clobbers(A,X,Y) ; uses x=r0, y=r1, ptr=r2, width=r3, height=r4
romsub $ff3b = GRAPH_set_font() clobbers(A,X,Y) ; uses ptr=r0
romsub $ff3e = GRAPH_get_char_size(ubyte baseline @A, ubyte width @X, ubyte height_or_style @Y, ubyte is_control @Pc) clobbers(A,X,Y)
romsub $ff41 = GRAPH_put_char(ubyte char @A) clobbers(A,X,Y) ; uses x=r0, y=r1
; framebuffer
romsub $fef6 = FB_init() clobbers(A,X,Y)
romsub $fef9 = FB_get_info() clobbers(X,Y) -> byte @A ; also outputs width=r0, height=r1
romsub $fefc = FB_set_palette(ubyte index @A, ubyte bytecount @X) clobbers(A,X,Y) ; also uses pointer=r0
romsub $feff = FB_cursor_position() clobbers(A,X,Y) ; uses x=r0, y=r1
romsub $ff02 = FB_cursor_next_line() clobbers(A,X,Y) ; uses x=r0
romsub $ff05 = FB_get_pixel() clobbers(X,Y) -> ubyte @A
romsub $ff08 = FB_get_pixels() clobbers(A,X,Y) ; uses ptr=r0, count=r1
romsub $ff0b = FB_set_pixel(ubyte color @A) clobbers(A,X,Y)
romsub $ff0e = FB_set_pixels() clobbers(A,X,Y) ; uses ptr=r0, count=r1
romsub $ff11 = FB_set_8_pixels(ubyte pattern @A, ubyte color @X) clobbers(A,X,Y)
romsub $ff14 = FB_set_8_pixels_opaque(ubyte mask @A, ubyte color1 @X, ubyte color2 @Y) clobbers(A,X,Y) ; also uses r0L=pattern
romsub $ff17 = FB_fill_pixels(ubyte color @A) clobbers(A,X,Y) ; also uses count=r0, step=r1
romsub $ff1a = FB_filter_pixels() clobbers(A,X,Y) ; uses ptr=r0, count=r1
romsub $ff1d = FB_move_pixels() clobbers(A,X,Y) ; uses sx=r0, sy=r1, tx=r2, ty=r3, count=r4
; misc
romsub $fef0 = sprite_set_image(ubyte number @A, ubyte width @X, ubyte height @Y, ubyte apply_mask @Pc) clobbers(A,X,Y) -> ubyte @Pc ; also uses pixels=r0, mask=r1, bpp=r2L
romsub $fef3 = sprite_set_position(ubyte number @A) clobbers(A,X,Y) ; also uses x=r0 and y=r1
romsub $fee4 = memory_fill(ubyte value @A) clobbers(A,X,Y) ; uses address=r0, num_bytes=r1
romsub $fee7 = memory_copy() clobbers(A,X,Y) ; uses source=r0, target=r1, num_bytes=r2
romsub $feea = memory_crc() clobbers(A,X,Y) ; uses address=r0, num_bytes=r1 result->r2
romsub $feed = memory_decompress() clobbers(A,X,Y) ; uses input=r0, output=r1 result->r1
romsub $fedb = console_init() clobbers(A,X,Y) ; uses x=r0, y=r1, width=r2, height=r3
romsub $fede = console_put_char(ubyte char @A, ubyte wrapping @Pc) clobbers(A,X,Y)
romsub $fee1 = console_get_char() clobbers(X,Y) -> ubyte @A
romsub $fed8 = console_put_image() clobbers(A,X,Y) ; uses ptr=r0, width=r1, height=r2
romsub $fed5 = console_set_paging_message() clobbers(A,X,Y) ; uses messageptr=r0
romsub $fed2 = kbdbuf_put(ubyte key @A) clobbers(A,X,Y)
romsub $fecf = entropy_get() -> ubyte @A, ubyte @X, ubyte @Y
romsub $fecc = monitor() clobbers(A,X,Y)
; ---- end of kernal routines ----
; ---- utilities -----
asmsub vpeek(ubyte bank @A, uword address @XY) -> ubyte @A {
; -- get a byte from VERA's video memory
; note: inefficient when reading multiple sequential bytes!
%asm {{
stz cx16.VERA_CTRL
and #1
sta cx16.VERA_ADDR_H
sty cx16.VERA_ADDR_M
stx cx16.VERA_ADDR_L
lda cx16.VERA_DATA0
rts
}}
}
sub vpoke(ubyte bank, uword address, ubyte value) {
; -- write a single byte to VERA's video memory
; note: inefficient when writing multiple sequential bytes!
%asm {{
stz cx16.VERA_CTRL
lda bank
and #1
sta cx16.VERA_ADDR_H
lda address
sta cx16.VERA_ADDR_L
lda address+1
sta cx16.VERA_ADDR_M
lda value
sta cx16.VERA_DATA0
rts
}}
}
sub FB_set_pixels_from_buf(uword buffer, uword count) {
%asm {{
; -- This is replacement code for the normal FB_set_pixels subroutine in ROM
; However that routine contains a bug in the current v38 ROM that makes it crash when count > 255.
; So the code below replaces that. Once the ROM is patched this routine is no longer necessary.
; See https://github.com/commanderx16/x16-rom/issues/179
phx
lda buffer
ldy buffer+1
sta P8ZP_SCRATCH_W1
sty P8ZP_SCRATCH_W1+1
jsr _pixels
plx
rts
_pixels lda count+1
beq +
ldx #0
- jsr _loop
inc P8ZP_SCRATCH_W1+1
dec count+1
bne -
+ ldx count
_loop ldy #0
- lda (P8ZP_SCRATCH_W1),y
sta cx16.VERA_DATA0
iny
dex
bne -
rts
}}
}
sub wait(uword jiffies) {
uword current_time = 0
c64.SETTIM(0,0,0)
while current_time < jiffies {
; read clock
%asm {{
phx
jsr c64.RDTIM
sta current_time
stx current_time+1
plx
}}
}
}
; ---- system stuff -----
asmsub init_system() {
; Initializes the machine to a sane starting state.
; Called automatically by the loader program logic.
%asm {{
sei
cld
;stz $00
;stz $01
;stz d1prb ; select rom bank 0
lda #$80
sta VERA_CTRL
jsr c64.IOINIT
jsr c64.RESTOR
jsr c64.CINT
lda #$90 ; black
jsr c64.CHROUT
lda #1 ; swap fg/bg
jsr c64.CHROUT
lda #$9e ; yellow
jsr c64.CHROUT
lda #147 ; clear screen
jsr c64.CHROUT
lda #0
tax
tay
clc
clv
cli
rts
}}
}
asmsub reset_system() {
; Soft-reset the system back to Basic prompt.
%asm {{
sei
lda #14
sta $01
stz cx16.d1prb ; bank the kernal in
jmp (cx16.RESET_VEC)
}}
}
}
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