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https://github.com/cc65/cc65.git
synced 2024-07-04 13:29:35 +00:00
806ffe5675
Tested on real KIM-1 hardware. read.s: - Remove commented out line. - Remove unused check for bell character. - Remove echo of newline (hardware always echoes entered characters). - This fixes gets() and fgets() so they return when CR is entered. write.s: - Fix check for adding return after linefeed (failed to work because OUTCHR changes A) - Remove unused check for bell character. kim1.inc: - Add symbol for monitor entry crt0.s: - Jump to KIM-1 monitor by address rather than using BRK (which relies on vector being set in RAM)
46 lines
1.1 KiB
ArmAsm
46 lines
1.1 KiB
ArmAsm
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; Startup code for cc65 (KIM-1 version)
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;
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.export _init, _exit
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.export __STARTUP__ : absolute = 1 ; Mark as startup
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.import _main
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.import initlib, donelib, copydata, zerobss
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.import __RAM_START__, __RAM_SIZE__ ; Linker generated
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.import __STACKSIZE__ ; Linker generated
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.include "zeropage.inc"
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.include "kim1.inc"
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; Place the startup code in a special segment
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.segment "STARTUP"
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; A little light housekeeping
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_init: cld ; Clear decimal mode
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; Set cc65 argument stack pointer
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lda #<(__RAM_START__ + __RAM_SIZE__)
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sta sp
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lda #>(__RAM_START__ + __RAM_SIZE__)
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sta sp+1
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; Initialize memory storage
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jsr zerobss ; Clear BSS segment
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jsr copydata ; Initialize DATA segment
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jsr initlib ; Run constructors
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; Call main()
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jsr _main
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; Back from main (this is also the _exit entry). Jumps to the KIM-1 monitor.
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_exit: jmp START
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