mirror of https://github.com/hsoft/collapseos.git
72 lines
1.5 KiB
NASM
72 lines
1.5 KiB
NASM
; zasm
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;
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; Reads input from specified blkdev ID, assemble the binary in two passes and
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; spit the result in another specified blkdev ID.
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;
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; We don't buffer the whole source in memory, so we need our input blkdev to
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; support Seek so we can read the file a second time. So, for input, we need
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; GetC and Seek.
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;
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; For output, we only need PutC. Output doesn't start until the second pass.
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;
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; The goal of the second pass is to assign values to all symbols so that we
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; can have forward references (instructions referencing a label that happens
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; later).
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;
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; Labels and constants are both treated the same way, that is, they can be
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; forward-referenced in instructions. ".equ" directives, however, are evaluated
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; during the first pass so forward references are not allowed.
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;
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; *** Requirements ***
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; blockdev
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; strncmp
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; addDE
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; addHL
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; upcase
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; unsetZ
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; intoDE
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; intoHL
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; writeHLinDE
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; findchar
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; parseHex
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; parseHexPair
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; blkSel
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; fsFindFN
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; fsOpen
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; fsGetC
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; fsSeek
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; fsTell
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; cpHLDE
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; parseArgs
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; _blkGetC
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; _blkPutC
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; _blkSeek
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; _blkTell
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; FS_HANDLE_SIZE
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; BLOCKDEV_SIZE
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; *** Variables ***
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#include "user.h"
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#include "err.h"
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.org USER_CODE
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jp zasmMain
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#include "zasm/const.asm"
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#include "zasm/util.asm"
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.equ IO_RAMSTART USER_RAMSTART
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#include "zasm/io.asm"
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.equ TOK_RAMSTART IO_RAMEND
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#include "zasm/tok.asm"
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#include "zasm/parse.asm"
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#include "zasm/expr.asm"
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#include "zasm/instr.asm"
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.equ DIREC_RAMSTART TOK_RAMEND
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#include "zasm/directive.asm"
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.equ SYM_RAMSTART DIREC_RAMEND
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#include "zasm/symbol.asm"
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.equ ZASM_RAMSTART SYM_RAMEND
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#include "zasm/main.asm"
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