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Add STARTUP and LOWCODE segments

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1601 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
2002-11-23 11:10:50 +00:00
parent fe75b5c3f3
commit d7d86886b6
4 changed files with 25 additions and 32 deletions
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34
libsrc/atmos/crt0.s
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@@ -13,35 +13,14 @@
; ------------------------------------------------------------------------
; Define and export the ZP variables for the Oric runtime
; Create an empty LOWCODE segment to avoid linker warnings
.exportzp sp, sreg, regsave
.exportzp ptr1, ptr2, ptr3, ptr4
.exportzp tmp1, tmp2, tmp3, tmp4
.exportzp regbank, zpspace
.zeropage
zpstart = *
sp: .res 2 ; Stack pointer
sreg: .res 2 ; Secondary register/high 16 bit for longs
regsave: .res 2 ; slot to save/restore (E)AX into
ptr1: .res 2
ptr2: .res 2
ptr3: .res 2
ptr4: .res 2
tmp1: .res 1
tmp2: .res 1
tmp3: .res 1
tmp4: .res 1
regbank: .res 6 ; 6 byte register bank
zpspace = * - zpstart ; Zero page space allocated
.code
.segment "LOWCODE"
; ------------------------------------------------------------------------
; Actual code
; Place the startup code in a special segment.
.segment "STARTUP"
; Clear the BSS data
@@ -82,6 +61,9 @@ _exit: jsr donelib ; Run module destructors
rts
; ------------------------------------------------------------------------
; Data
.bss
spsave: .res 1