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c64 init
This commit is contained in:
Irmen de Jong
parent
a3faf07c8c
commit
c07698dfda
110
lib/c64lib.ill
110
lib/c64lib.ill
@ -157,7 +157,7 @@ sub ATN () -> (A?, X?, Y?) = $e30e ; fac1 = ATN(fac1)
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; ---- C64 basic routines ----
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; ---- C64 basic routines ----
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sub CLEARSCR () -> (A?, X?, Y?) = $E544 ; clear the screen
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sub CLEARSCR () -> (A?, X?, Y?) = $E544 ; clear the screen
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sub HOMECRSR () -> (A?, X?, Y?) = $E566 ; cursor to top left of screen
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sub HOMECRSR () -> (A?, X?, Y?) = $E566 ; cursor to top left of screen
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; ---- end of C64 basic routines ----
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; ---- end of C64 basic routines ----
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@ -168,57 +168,87 @@ sub HOMECRSR () -> (A?, X?, Y?) = $E566 ; cursor to top left of screen
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sub IRQDFRT () -> (A?, X?, Y?) = $EA31 ; default IRQ routine
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sub IRQDFRT () -> (A?, X?, Y?) = $EA31 ; default IRQ routine
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sub IRQDFEND () -> (A?, X?, Y?) = $EA81 ; default IRQ end/cleanup
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sub IRQDFEND () -> (A?, X?, Y?) = $EA81 ; default IRQ end/cleanup
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sub CINT () -> (A?, X?, Y?) = $FF81 ; (alias: SCINIT) initialize screen editor and video chip
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sub CINT () -> (A?, X?, Y?) = $FF81 ; (alias: SCINIT) initialize screen editor and video chip
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sub IOINIT () -> (A?, X?) = $FF84 ; initialize I/O devices
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sub IOINIT () -> (A?, X?) = $FF84 ; initialize I/O devices (CIA, SID, IRQ)
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sub RAMTAS () -> (A?, X?, Y?) = $FF87 ; initialize RAM, tape buffer, screen
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sub RAMTAS () -> (A?, X?, Y?) = $FF87 ; initialize RAM, tape buffer, screen
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sub RESTOR () -> () = $FF8A ; restore default I/O vectors
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sub RESTOR () -> (A?, X?, Y?) = $FF8A ; restore default I/O vectors
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sub VECTOR (dir: SC, userptr: XY) -> (A?, Y?) = $FF8D ; read/set I/O vector table
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sub VECTOR (dir: SC, userptr: XY) -> (A?, Y?) = $FF8D ; read/set I/O vector table
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sub SETMSG (value: A) -> () = $FF90 ; set Kernal message control flag
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sub SETMSG (value: A) -> () = $FF90 ; set Kernal message control flag
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sub SECOND (address: A) -> (A?) = $FF93 ; (alias: LSTNSA) send secondary address after LISTEN
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sub SECOND (address: A) -> (A?) = $FF93 ; (alias: LSTNSA) send secondary address after LISTEN
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sub TKSA (address: A) -> (A?) = $FF96 ; (alias: TALKSA) send secondary address after TALK
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sub TKSA (address: A) -> (A?) = $FF96 ; (alias: TALKSA) send secondary address after TALK
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sub MEMTOP (dir: SC, address: XY) -> (XY) = $FF99 ; read/set top of memory pointer
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sub MEMTOP (dir: SC, address: XY) -> (XY) = $FF99 ; read/set top of memory pointer
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sub MEMBOT (dir: SC, address: XY) -> (XY) = $FF9C ; read/set bottom of memory pointer
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sub MEMBOT (dir: SC, address: XY) -> (XY) = $FF9C ; read/set bottom of memory pointer
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sub SCNKEY () -> (A?, X?, Y?) = $FF9F ; scan the keyboard
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sub SCNKEY () -> (A?, X?, Y?) = $FF9F ; scan the keyboard
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sub SETTMO (timeout: A) -> () = $FFA2 ; set time-out flag for IEEE bus
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sub SETTMO (timeout: A) -> () = $FFA2 ; set time-out flag for IEEE bus
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sub ACPTR () -> (A) = $FFA5 ; (alias: IECIN) input byte from serial bus
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sub ACPTR () -> (A) = $FFA5 ; (alias: IECIN) input byte from serial bus
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sub CIOUT (byte: A) -> () = $FFA8 ; (alias: IECOUT) output byte to serial bus
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sub CIOUT (byte: A) -> () = $FFA8 ; (alias: IECOUT) output byte to serial bus
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sub UNTLK () -> (A?) = $FFAB ; command serial bus device to UNTALK
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sub UNTLK () -> (A?) = $FFAB ; command serial bus device to UNTALK
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sub UNLSN () -> (A?) = $FFAE ; command serial bus device to UNLISTEN
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sub UNLSN () -> (A?) = $FFAE ; command serial bus device to UNLISTEN
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sub LISTEN (device: A) -> (A?) = $FFB1 ; command serial bus device to LISTEN
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sub LISTEN (device: A) -> (A?) = $FFB1 ; command serial bus device to LISTEN
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sub TALK (device: A) -> (A?) = $FFB4 ; command serial bus device to TALK
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sub TALK (device: A) -> (A?) = $FFB4 ; command serial bus device to TALK
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sub READST () -> (A) = $FFB7 ; read I/O status word
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sub READST () -> (A) = $FFB7 ; read I/O status word
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sub SETLFS (logical: A, device: X, address: Y) -> () = $FFBA ; set logical file parameters
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sub SETLFS (logical: A, device: X, address: Y) -> () = $FFBA ; set logical file parameters
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sub SETNAM (namelen: A, filename: XY) -> () = $FFBD ; set filename parameters
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sub SETNAM (namelen: A, filename: XY) -> () = $FFBD ; set filename parameters
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sub OPEN () -> (A?, X?, Y?) = $FFC0 ; (via 794 ($31A)) open a logical file
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sub OPEN () -> (A?, X?, Y?) = $FFC0 ; (via 794 ($31A)) open a logical file
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sub CLOSE (logical: A) -> (A?, X?, Y?) = $FFC3 ; (via 796 ($31C)) close a logical file
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sub CLOSE (logical: A) -> (A?, X?, Y?) = $FFC3 ; (via 796 ($31C)) close a logical file
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sub CHKIN (logical: X) -> (A?, X?) = $FFC6 ; (via 798 ($31E)) define an input channel
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sub CHKIN (logical: X) -> (A?, X?) = $FFC6 ; (via 798 ($31E)) define an input channel
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sub CHKOUT (logical: X) -> (A?, X?) = $FFC9 ; (via 800 ($320)) define an output channel
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sub CHKOUT (logical: X) -> (A?, X?) = $FFC9 ; (via 800 ($320)) define an output channel
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sub CLRCHN () -> (A?, X?) = $FFCC ; (via 802 ($322)) restore default devices
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sub CLRCHN () -> (A?, X?) = $FFCC ; (via 802 ($322)) restore default devices
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sub CHRIN () -> (A, Y?) = $FFCF ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
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sub CHRIN () -> (A, Y?) = $FFCF ; (via 804 ($324)) input a character (for keyboard, read a whole line from the screen) A=byte read.
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sub CHROUT (char: A) -> () = $FFD2 ; (via 806 ($326)) output a character
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sub CHROUT (char: A) -> () = $FFD2 ; (via 806 ($326)) output a character
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sub LOAD (verify: A, address: XY) -> (SC, A, X, Y) = $FFD5 ; (via 816 ($330)) load from device
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sub LOAD (verify: A, address: XY) -> (SC, A, X, Y) = $FFD5 ; (via 816 ($330)) load from device
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sub SAVE (zp_startaddr: A, endaddr: XY) -> (SC, A) = $FFD8 ; (via 818 ($332)) save to a device
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sub SAVE (zp_startaddr: A, endaddr: XY) -> (SC, A) = $FFD8 ; (via 818 ($332)) save to a device
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sub SETTIM (low: A, middle: X, high: Y) -> () = $FFDB ; set the software clock
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sub SETTIM (low: A, middle: X, high: Y) -> () = $FFDB ; set the software clock
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sub RDTIM () -> (A, X, Y) = $FFDE ; read the software clock
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sub RDTIM () -> (A, X, Y) = $FFDE ; read the software clock
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sub STOP () -> (SZ, SC, A?, X?) = $FFE1 ; (via 808 ($328)) check the STOP key
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sub STOP () -> (SZ, SC, A?, X?) = $FFE1 ; (via 808 ($328)) check the STOP key
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sub GETIN () -> (A, X?, Y?) = $FFE4 ; (via 810 ($32A)) get a character
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sub GETIN () -> (A, X?, Y?) = $FFE4 ; (via 810 ($32A)) get a character
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sub CLALL () -> (A?, X?) = $FFE7 ; (via 812 ($32C)) close all files
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sub CLALL () -> (A?, X?) = $FFE7 ; (via 812 ($32C)) close all files
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sub UDTIM () -> (A?, X?) = $FFEA ; update the software clock
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sub UDTIM () -> (A?, X?) = $FFEA ; update the software clock
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sub SCREEN () -> (X, Y) = $FFED ; read number of screen rows and columns
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sub SCREEN () -> (X, Y) = $FFED ; read number of screen rows and columns
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sub PLOT (dir: SC, col: X, row: Y) -> (X, Y) = $FFF0 ; read/set position of cursor on screen
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sub PLOT (dir: SC, col: X, row: Y) -> (X, Y) = $FFF0 ; read/set position of cursor on screen
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sub IOBASE () -> (X, Y) = $FFF3 ; read base address of I/O devices
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sub IOBASE () -> (X, Y) = $FFF3 ; read base address of I/O devices
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; ---- end of C64 kernal routines ----
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; ---- end of C64 kernal routines ----
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memory .word NMI_VEC = $FFFA ; nmi vector, set by the kernal if banked in
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memory .word NMI_VEC = $FFFA ; nmi vector, set by the kernal if banked in
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memory .word RESET_VEC = $FFFC ; reset vector, set by the kernal if banked in
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memory .word RESET_VEC = $FFFC ; reset vector, set by the kernal if banked in
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memory .word IRQ_VEC = $FFFE ; interrupt vector, set by the kernal if banked in
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memory .word IRQ_VEC = $FFFE ; interrupt vector, set by the kernal if banked in
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}
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}
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~ c64util {
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~ c64util {
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sub init_state () -> (A?, X?, Y?) {
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; ---- initializes the machine to a sane starting state
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; This means that the BASIC, KERNAL and CHARGEN ROMs are banked in,
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; the VIC, SID and CIA chips are reset, screen is cleared, and the default IRQ is set.
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; Also a different color scheme is chosen to identify ourselves a little.
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asm {
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sei
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cld
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lda #%00101111
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sta $00
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lda #%00100111
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sta $01
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jsr c64.IOINIT
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jsr c64.RESTOR
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jsr c64.CINT
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lda #6
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sta c64.EXTCOL
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lda #7
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sta c64.COLOR
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lda #0
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sta c64.BGCOL0
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tax
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tay
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clc
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cli
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rts
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}
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}
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sub FREADS32 () -> (A?, X?, Y?) {
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sub FREADS32 () -> (A?, X?, Y?) {
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; ---- fac1 = signed int32 from $62-$65 big endian (MSB FIRST)
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; ---- fac1 = signed int32 from $62-$65 big endian (MSB FIRST)
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asm {
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asm {
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