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38 lines
856 B
ArmAsm
38 lines
856 B
ArmAsm
;
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; Cassette boot file header
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;
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; Christian Groessler, chris@groessler.org, 2014
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;
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;DEBUG = 1
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.ifndef __ATARIXL__
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.include "atari.inc"
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.import __BSS_RUN__, __STARTADDRESS__, _cas_init
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.export _cas_hdr
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.assert ((__BSS_RUN__ - __STARTADDRESS__ + 127) / 128) < $101, error, "File to big to load from cassette"
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; for a description of the cassette header, see De Re Atari, appendix C
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.segment "CASHDR"
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_cas_hdr:
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.byte 0 ; ignored
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.byte <((__BSS_RUN__ - __STARTADDRESS__ + 127) / 128) ; # of 128-byte records to read
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.word __STARTADDRESS__ ; load address
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.word _cas_init ; init address
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.ifdef DEBUG
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lda #33
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ldy #80
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sta (SAVMSC),y
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.endif
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clc
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rts
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.endif ; .ifdef __ATARIXL__
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