mirror of
https://github.com/cc65/cc65.git
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50 lines
1.1 KiB
ArmAsm
50 lines
1.1 KiB
ArmAsm
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; ***
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; CC65 Lynx Library
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;
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; Originally by Bastian Schick
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; http://www.geocities.com/SiliconValley/Byte/4242/lynx/
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;
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; Ported to cc65 (http://www.cc65.org) by
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; Shawn Jefferson, June 2004
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;
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; ***
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;
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; void __fastcall__ read_cart_block(unsigned char block, char *dest)
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;
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; Reads an entire block (1024 bytes) from the cartridge into the buffer
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; pointed to by dest.
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.export _read_cart_block
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.import FileSelectBlock, FileReadBytes
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.import popa
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.include "extzp.inc"
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.code
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;*******************************************
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; void read_cart_block (unsigned char block, char *dest);
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; loads one Block (1024 bytes) to pDest
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_read_cart_block:
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sta _FileDestPtr ; lo
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stx _FileDestPtr+1 ; hi
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jsr popa ; bBlock
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sta _FileCurrBlock
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jsr FileSelectBlock ; select block# (Accu)
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lda #<1024 ; load a whole block (1024 bytes)
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eor #$ff
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tax
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lda #>1024
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eor #$ff
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tay
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jmp FileReadBytes
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