snark13
c71e249a4e
First substantive commit: the entire Sprinter C compiler tree on top of
the bare README+gitignore initial commit.
What's in here:
bin/sprinter-cc — driver script invoking SDCC + linker + mkexe
libc/ — Sprinter-specific libc layer over ESTEX/BIOS
(conio, gfx, io, mem, stdio + headers)
runtime/ — crt0 variants (default/small/banked/minimal)
+ heap + bank trampolines
toolchain/ — mkexe (SprintEXE packer, C + tests)
examples/ — 30 demo programs (gfx, file I/O, env, time, …)
lib/Makefile — builds the libc archive (sprinter.lib)
docs/ — converted Sprinter manuals + asm reference samples
third_party/ — solid-c reference compiler dump + sdcc setup script
release_docs/ — packaging / release notes
gitignore overhaul:
• Drop dangerous blanket patterns: *.asm (would hide docs/samples/*.asm)
and *.exe (case-insensitive match was hiding third_party/solid-c/*.EXE
on macOS APFS). Replaced with examples/*/*.{asm,exe,…} and lib/*.lib.
• Restore tracking of toolchain/mkexe/tests/{one,big}.bin — those are
INPUT fixtures, not build outputs.
• Collapse the duplicated SDCC/C/Sdcc sections into one section per
concern (build outputs / vendored / OS-junk).
• Add .sprinter-cc-*/, build/ (catches lib/build/ too), .claude/.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
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* read / write — bulk transfer through ESTEX file handles.
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*
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* ESTEX READ ($13) / WRITE ($14):
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* A = handle, HL = buffer, DE = byte count
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* → DE = bytes actually transferred, CF = err with code in A.
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*
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* SDCC __sdcccall(1) for 3-arg int functions uses callee-pops for the
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* stack-passed argument; this implementation mirrors the pattern used
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* by SDCC's own z80.lib _memset.
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*
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* On error: sets errno, returns -1.
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*/
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#include <unistd.h>
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int read(int fd, void *buf, size_t n) __naked
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{
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(void)fd; (void)buf; (void)n;
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__asm
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pop iy ; IY = return address
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pop bc ; BC = n (stack arg)
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ld a, l ; A = handle
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ex de, hl ; HL = buf
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ld d, b
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ld e, c ; DE = n
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push ix
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push iy ; preserve return addr across RST
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ld c, #0x13 ; ESTEX READ
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rst #0x10
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pop iy
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pop ix
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jr c, _read_err
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;; DE already holds count read.
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jp (iy)
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_read_err:
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call __errno_set
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ld de, #-1
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jp (iy)
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__endasm;
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}
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int write(int fd, const void *buf, size_t n) __naked
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{
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(void)fd; (void)buf; (void)n;
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__asm
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pop iy
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pop bc
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ld a, l
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ex de, hl
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ld d, b
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ld e, c
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push ix
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push iy
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ld c, #0x14
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rst #0x10
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pop iy
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pop ix
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jr c, _write_err
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jp (iy)
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_write_err:
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call __errno_set
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ld de, #-1
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jp (iy)
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__endasm;
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}
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