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Use structs

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2711 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz 2003-12-03 20:54:43 +00:00
parent a1092ca7da
commit 298767d71a
2 changed files with 28 additions and 27 deletions
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31
asminc/o65.inc
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@ -38,21 +38,22 @@
; Offsets into the o65 header structure (6502 format)
O65_HDR_MARKER = 0 ; Non-C64 marker
O65_HDR_MAGIC = 2 ; o65 magic
O65_HDR_VERSION = 5 ; Version number
O65_HDR_MODE = 6 ; Mode word
O65_HDR_TBASE = 8 ; Original text (code) segment address
O65_HDR_TLEN = 10 ; Size of text (code) segment
O65_HDR_DBASE = 12 ; Original data segment address
O65_HDR_DLEN = 14 ; Size of data segment
O65_HDR_BBASE = 16 ; Original bss segment address
O65_HDR_BLEN = 18 ; Size of bss segment
O65_HDR_ZBASE = 20 ; Original zp segment address
O65_HDR_ZLEN = 22 ; Size of zp segment
O65_HDR_STACK = 24 ; Stacksize needed
O65_HDR_SIZE = 26 ; Size of header structure
; The o65 header structure (6502 format)
.struct O65_HDR
MARKER .byte 2 ; Non-C64 marker: $01 $00
MAGIC .byte 3 ; o65 magic: "o65"
VERSION .byte 1 ; Version number
MODE .word ; Mode word
TBASE .word ; Original text (code) segment address
TLEN .word ; Size of text (code) segment
DBASE .word ; Original data segment address
DLEN .word ; Size of data segment
BBASE .word ; Original bss segment address
BLEN .word ; Size of bss segment
ZBASE .word ; Original zp segment address
ZLEN .word ; Size of zp segment
STACK .word ; Stacksize needed
.endstruct
; Marker, magic and version number
O65_MARKER_0 = $01

24
libsrc/common/modload.s
View File

@ -63,7 +63,7 @@ RegBankSave: .res 6 ; Save area for register bank
; The header of the o65 file. Since we don't need the first 8 bytes any
; longer, once we've checked them, we will overlay them with other data to
; save a few bytes.
Header: .res O65_HDR_SIZE ; The o65 header
Header: .tag O65_HDR ; The o65 header
; Input
InputByte = Header ; Byte read from input
@ -349,7 +349,7 @@ _mod_load:
lda #<Header
ldx #>Header
jsr pushax
lda #O65_HDR_SIZE
lda #.sizeof(O65_HDR)
ldx #0 ; Always less than 256
jsr ReadAndCheckError ; Bails out in case of errors
@ -439,19 +439,19 @@ HeaderError:
; caller
CalcSizes:
lda Header + O65_HDR_TLEN
add Header + O65_HDR_DLEN
lda Header + O65_HDR::TLEN
add Header + O65_HDR::DLEN
sta TPtr
lda Header + O65_HDR_TLEN + 1
adc Header + O65_HDR_DLEN + 1
lda Header + O65_HDR::TLEN + 1
adc Header + O65_HDR::DLEN + 1
sta TPtr+1
lda TPtr
add Header + O65_HDR_BLEN
add Header + O65_HDR::BLEN
pha ; Save low byte of total size
ldy #MOD_CTRL::MODULE_SIZE
sta (Ctrl),y
lda TPtr+1
adc Header + O65_HDR_BLEN + 1
adc Header + O65_HDR::BLEN + 1
iny
sta (Ctrl),y
tax
@ -489,8 +489,8 @@ GotMem: lda Module
tax
pla
jsr pushax
lda Header + O65_HDR_BLEN
ldx Header + O65_HDR_BLEN+1
lda Header + O65_HDR::BLEN
ldx Header + O65_HDR::BLEN+1
jsr _bzero ; bzero (bss, bss_size);
; Load code and data segment into memory. The sum of the sizes of
@ -525,10 +525,10 @@ Reloc: lda Module
; Relocate the data segment
lda Module
add Header + O65_HDR_TLEN
add Header + O65_HDR::TLEN
pha
lda Module + 1
adc Header + O65_HDR_TLEN + 1
adc Header + O65_HDR::TLEN + 1
tax
pla ; Data segment address in a/x
jsr RelocSeg