6502/cc65
1
0
Fork 0
mirror of https://github.com/cc65/cc65.git synced 2024-06-07 23:29:39 +00:00
Code Issues Projects Releases Wiki Activity

Added an IRQ vector

Browse Source 
git-svn-id: svn://svn.cc65.org/cc65/trunk@2753 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2003-12-14 17:39:22 +00:00
parent 6a3ea29429
commit ba079ae6a1
5 changed files with 41 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
asminc/ser-kernel.inc
View File

@ -48,6 +48,7 @@
PUT .word ; PUT routine
STATUS .word ; STATUS routine
IOCTL .word ; IOCTL routine
IRQ .word ; IRQ routine
.endstruct
.endstruct
@ -138,7 +139,7 @@ SER_STATUS_DSR = $40 ; NOT data set ready
.global ser_put
.global ser_status
.global ser_ioctl
.global ser_irq
;------------------------------------------------------------------------------
; ASM functions

8
libsrc/c128/c128-swlink.s
View File

@ -47,6 +47,7 @@
.word PUT
.word STATUS
.word IOCTL
.word IRQ
;----------------------------------------------------------------------------
; I/O definitions
@ -56,7 +57,6 @@ ACIA_DATA = ACIA+0 ; Data register
ACIA_STATUS = ACIA+1 ; Status register
ACIA_CMD = ACIA+2 ; Command register
ACIA_CTRL = ACIA+3 ; Control register
ACIA_CLOCK = ACIA+7 ; Turbo232 external baud-rate generator
;----------------------------------------------------------------------------
;
@ -397,6 +397,12 @@ IOCTL: lda #<SER_ERR_INV_IOCTL ; We don't support ioclts for now
ldx #>SER_ERR_INV_IOCTL
rts
;----------------------------------------------------------------------------
; IRQ: Not used on the C128
;
IRQ = $0000
;----------------------------------------------------------------------------
;
; NMI handler

10
libsrc/c64/c64-swlink.s
View File

@ -47,6 +47,7 @@
.word PUT
.word STATUS
.word IOCTL
.word IRQ
;----------------------------------------------------------------------------
; I/O definitions
@ -56,7 +57,6 @@ ACIA_DATA = ACIA+0 ; Data register
ACIA_STATUS = ACIA+1 ; Status register
ACIA_CMD = ACIA+2 ; Command register
ACIA_CTRL = ACIA+3 ; Control register
ACIA_CLOCK = ACIA+7 ; Turbo232 external baud-rate generator
;----------------------------------------------------------------------------
;
@ -368,7 +368,13 @@ STATUS: lda ACIA_STATUS
IOCTL: lda #<SER_ERR_INV_IOCTL ; We don't support ioclts for now
ldx #>SER_ERR_INV_IOCTL
rts
rts
;----------------------------------------------------------------------------
; IRQ: Not used on the C64
;
IRQ = $0000
;----------------------------------------------------------------------------
;

15
libsrc/serial/ser-kernel.s
View File

@ -4,9 +4,9 @@
; Common functions of the serial drivers
;
.export ser_clear_ptr
.import return0
.importzp ptr1
.condes ser_irq, 2 ; Export as IRQ handler
.include "ser-kernel.inc"
.include "ser-error.inc"
@ -30,6 +30,7 @@ ser_get: jmp return0
ser_put: jmp return0
ser_status: jmp return0
ser_ioctl: jmp return0
ser_irq: .byte $60, $00, $00 ; RTS plus two dummy bytes
; Driver header signature
.rodata
@ -66,7 +67,13 @@ _ser_install:
cpy #(SER_HDR::JUMPTAB + .sizeof(SER_HDR::JUMPTAB))
bne @L1
jmp ser_install ; Call driver install routine
jsr ser_install ; Call driver install routine
lda ser_irq+2 ; Check high byte of IRQ vector
beq @L2 ; Jump if vector invalid
lda #$4C ; Jump opcode
sta ser_irq ; Activate IRQ routine
@L2: rts
; Driver signature invalid
@ -92,7 +99,9 @@ copy: lda (ptr1),y
_ser_uninstall:
jsr ser_uninstall ; Call driver routine
ser_clear_ptr: ; External entry point
lda #$60 ; RTS opcode
sta ser_irq ; Disable IRQ entry point
lda #0
sta _ser_drv
sta _ser_drv+1 ; Clear the driver pointer

20
libsrc/serial/ser_unload.s
View File

@ -17,16 +17,20 @@ _ser_unload:
ora _ser_drv+1
beq no_driver ; No driver
jsr ser_uninstall ; Deinstall the driver
lda _ser_drv
pha
lda _ser_drv+1
pha ; Save pointer to driver
lda _ser_drv
ldx _ser_drv+1
jsr _mod_free ; Free the driver
jmp ser_clear_ptr ; Clear the driver pointer, return zero
jsr _ser_uninstall ; Deinstall the driver
pla
tax
pla ; Get pointer to driver
jmp _mod_free ; Free the driver
no_driver:
tax ; X = 0
lda #SER_ERR_NO_DRIVER
tax ; X = 0
lda #<SER_ERR_NO_DRIVER
rts