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Don't hardcode the address of the SYS call for the startup code of the
Commodore machines. git-svn-id: svn://svn.cc65.org/cc65/trunk@4474 b7a2c559-68d2-44c3-8de9-860c34a00d81
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uz
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@ -28,52 +28,56 @@ IRQInd = $2FD ; JMP $0000 - used as indirect IRQ vector
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; BASIC header with a SYS call
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.org $1BFF
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.org $1BFF
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.word Head ; Load address
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Head: .word @Next
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.word .version ; Line number
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.byte $9E,"7181" ; SYS 7181
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.byte $9E ; SYS token
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.byte <(((Start / 1000) .mod 10) + $30)
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.byte <(((Start / 100) .mod 10) + $30)
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.byte <(((Start / 10) .mod 10) + $30)
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.byte <(((Start / 1) .mod 10) + $30)
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.byte $00 ; End of BASIC line
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@Next: .word 0 ; BASIC end marker
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.reloc
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.reloc
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; ------------------------------------------------------------------------
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; Actual code
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; Close open files
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jsr CLRCH
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Start: jsr CLRCH
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; Switch to the second charset
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lda #14
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jsr BSOUT
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lda #14
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jsr BSOUT
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; Before doing anything else, we have to setup our banking configuration.
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; Otherwise just the lowest 16K are actually RAM. Writing through the ROM
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; to the underlying RAM works, but it is bad style.
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lda MMU_CR ; Get current memory configuration...
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lda MMU_CR ; Get current memory configuration...
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pha ; ...and save it for later
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lda #MMU_CFG_CC65 ; Bank0 with kernal ROM
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sta MMU_CR
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sta MMU_CR
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; Save the zero page locations we need
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ldx #zpspace-1
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L1: lda sp,x
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sta zpsave,x
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dex
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L1: lda sp,x
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sta zpsave,x
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dex
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bpl L1
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; Clear the BSS data
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jsr zerobss
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jsr zerobss
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; Save system stuff and setup the stack
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pla ; Get MMU setting
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sta mmusave
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pla ; Get MMU setting
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sta mmusave
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tsx
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stx spsave ; Save the system stack pointer
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@ -26,14 +26,18 @@
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.word Head ; Load address
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Head: .word @Next
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.word .version ; Line number
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.byte $9E,"4109" ; SYS 4109
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.byte $9E ; SYS token
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.byte <(((Start / 1000) .mod 10) + $30)
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.byte <(((Start / 100) .mod 10) + $30)
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.byte <(((Start / 10) .mod 10) + $30)
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.byte <(((Start / 1) .mod 10) + $30)
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.byte $00 ; End of BASIC line
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@Next: .word 0 ; BASIC end marker
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; ------------------------------------------------------------------------
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; Actual code
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ldx #zpspace-1
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Start: ldx #zpspace-1
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L1: lda sp,x
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sta zpsave,x ; save the zero page locations we need
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dex
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@ -25,14 +25,18 @@
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.word Head ; Load address
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Head: .word @Next
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.word .version ; Line number
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.byte $9E,"2061" ; SYS 2061
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.byte $9E ; SYS token
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.byte <(((Start / 1000) .mod 10) + $30)
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.byte <(((Start / 100) .mod 10) + $30)
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.byte <(((Start / 10) .mod 10) + $30)
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.byte <(((Start / 1) .mod 10) + $30)
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.byte $00 ; End of BASIC line
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@Next: .word 0 ; BASIC end marker
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; ------------------------------------------------------------------------
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; Actual code
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ldx #zpspace-1
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Start: ldx #zpspace-1
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L1: lda sp,x
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sta zpsave,x ; Save the zero page locations we need
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dex
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@ -24,14 +24,18 @@
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.word Head ; Load address
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Head: .word @Next
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.word .version ; Line number
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.byte $9E,"1037" ; SYS 1037
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.byte $9E ; SYS token
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.byte <(((Start / 1000) .mod 10) + $30)
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.byte <(((Start / 100) .mod 10) + $30)
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.byte <(((Start / 10) .mod 10) + $30)
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.byte <(((Start / 1) .mod 10) + $30)
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.byte $00 ; End of BASIC line
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@Next: .word 0 ; BASIC end marker
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; ------------------------------------------------------------------------
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; Actual code
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ldx #zpspace-1
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Start: ldx #zpspace-1
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L1: lda sp,x
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sta zpsave,x ; Save the zero page locations we need
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dex
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@ -28,14 +28,18 @@ IRQInd = $500 ; JMP $0000 - used as indirect IRQ vector
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.word Head ; Load address
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Head: .word @Next
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.word .version ; Line number
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.byte $9E,"4109" ; SYS 4109
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.byte $9E ; SYS token
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.byte <(((Start / 1000) .mod 10) + $30)
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.byte <(((Start / 100) .mod 10) + $30)
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.byte <(((Start / 10) .mod 10) + $30)
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.byte <(((Start / 1) .mod 10) + $30)
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.byte $00 ; End of BASIC line
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@Next: .word 0 ; BASIC end marker
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; ------------------------------------------------------------------------
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; Actual code
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sei ; No interrupts since we're banking out the ROM
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Start: sei ; No interrupts since we're banking out the ROM
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sta ENABLE_RAM
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ldx #zpspace-1
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L1: lda sp,x
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@ -25,18 +25,17 @@
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Head: .word @Next
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.word .version ; Line number
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.byte $9E ; SYS token
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.byte <(((@Start / 1000) .mod 10) + $30)
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.byte <(((@Start / 100) .mod 10) + $30)
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.byte <(((@Start / 10) .mod 10) + $30)
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.byte <(((@Start / 1) .mod 10) + $30)
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.byte <(((Start / 1000) .mod 10) + $30)
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.byte <(((Start / 100) .mod 10) + $30)
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.byte <(((Start / 10) .mod 10) + $30)
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.byte <(((Start / 1) .mod 10) + $30)
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.byte $00 ; End of BASIC line
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@Next: .word 0 ; BASIC end marker
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@Start:
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; ------------------------------------------------------------------------
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; Actual code
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ldx #zpspace-1
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Start: ldx #zpspace-1
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L1: lda sp,x
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sta zpsave,x ; Save the zero page locations we need
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dex
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