refactor: c/ -> usr/, compiled program blobs out of the source tree

Userland sources live in usr/ (fits the Unix theme better than 'c').
SDCC output .bin blobs land in build/usr/ with the other build artifacts
instead of littering the source dir; programs.asm INCBINs them from there.
Byte-identical ROM.

1 files changed, 0 insertions, 304 deletions

diff --git a/c/libc.s b/c/libc.s
deleted file mode 100644
index 5b176d9..0000000
--- a/c/libc.s
+++ /dev/null
@@ -1,304 +0,0 @@
-	.module libc
-	.globl _writes, _putc, _puts, _nl, _strlen, _readc, _sexit, _getpid, _getargs
-	.globl _open, _close, _fgetc, _fputc, _flist, _fremove, _pipe, _ssend, _srecv, _srecv_nb, _pollin, _pollcon
-	.globl _sys_net, _gsleep
-	;; SDCC sm83 sdcccall(1): 1st arg -> A (byte) or DE (pointer); ret A / BC.
-	;; rst $30 (the trap) clobbers BC/DE/HL; SDCC treats them caller-saved, so
-	;; wrappers need not preserve them - but we compute cleanly regardless.
-	.area _CODE
-
-	;; void writes(const char *buf /*DE*/, unsigned char len /*A*/)
-_writes:
-	ld	b, a
-	ld	c, #3			; SYS_WRITE
-	rst	#0x30
-	ret
-
-	;; char *getargs(void) -> BC : the arg string (command line past word 1).
-	;; The shell leaves "cmd\0args\0" at 0xA000, inherited by the child via fork.
-_getargs:
-	ld	hl, #0xa000
-1$:	ld	a, (hl)
-	inc	hl
-	or	a
-	jr	nz, 1$
-	ld	b, h
-	ld	c, l
-	ret
-
-	;; void putc(char c /*A*/) -> stdout via SYS_PUTC
-_putc:
-	ld	e, a
-	ld	c, #16			; SYS_PUTC
-	rst	#0x30
-	ret
-
-	;; void puts(const char *s /*DE*/) - write until NUL (no newline)
-_puts:
-1$:	ld	a, (de)
-	or	a
-	ret	z
-	push	de
-	ld	e, a
-	ld	c, #16			; SYS_PUTC
-	rst	#0x30
-	pop	de
-	inc	de
-	jr	1$
-
-	;; void nl(void) - CRLF via stdout
-_nl:
-	ld	e, #0x0d
-	ld	c, #16			; SYS_PUTC
-	rst	#0x30
-	ld	e, #0x0a
-	ld	c, #16
-	rst	#0x30
-	ret
-
-	;; unsigned char strlen(const char *s /*DE*/) -> A
-_strlen:
-	ld	c, #0
-1$:	ld	a, (de)
-	or	a
-	jr	z, 2$
-	inc	c
-	inc	de
-	jr	1$
-2$:	ld	a, c
-	ret
-
-	;; char readc(void) -> A   (4 = EOF)
-_readc:
-	ld	c, #2			; SYS_READ
-	rst	#0x30
-	ret
-
-	;; void sexit(unsigned char code /*A*/) - never returns
-_sexit:
-	ld	b, a
-	ld	c, #0			; SYS_EXIT
-	rst	#0x30
-	ret
-
-	;; unsigned char getpid(void) -> A
-_getpid:
-	ld	c, #8			; SYS_GETPID
-	rst	#0x30
-	ret
-
-	;; unsigned char pipe(void) -> A (read fd; write end is read+1)
-_pipe:
-	ld	c, #28			; SYS_PIPE
-	rst	#0x30
-	ret
-
-	;; void ssend(unsigned char b /*A*/)  -- link-port transmit
-_ssend:
-	ld	e, a
-	ld	c, #29			; SYS_SSEND
-	rst	#0x30
-	ret
-
-	;; unsigned char srecv(void) -> A  -- link-port receive (blocks)
-_srecv:
-	ld	c, #30			; SYS_SRECV
-	rst	#0x30
-	ret
-
-	;; int srecv_nb(void) -> byte, or -1 if none (non-blocking)
-_srecv_nb:
-	ld	c, #31			; SYS_SRECVNB
-	rst	#0x30
-	jr	c, 1$
-	ld	c, a
-	ld	b, #0
-	ret
-1$:	ld	bc, #0xffff
-	ret
-
-	;; unsigned char sys_net(void *req /*DE*/) -> A  -- socket layer trap
-_sys_net:
-	ld	c, #33			; SYS_NET (DE already = &netreq)
-	rst	#0x30
-	ret
-
-	;; void gsleep(unsigned char units /*A*/) - delay units*(1/64)s
-_gsleep:
-	ld	b, a
-	ld	c, #34			; SYS_SLEEP
-	rst	#0x30
-	ret
-
-	;; unsigned char pollin(void) -> A  (typed OSK char, or 0)
-_pollin:
-	ld	c, #32			; SYS_POLLIN
-	rst	#0x30
-	ret
-
-	;; unsigned char pollcon(void) -> A  (queued console byte, or 0)
-_pollcon:
-	ld	c, #35			; SYS_POLLCON
-	rst	#0x30
-	ret
-
-	;; unsigned char open(const char *name /*DE*/, unsigned char mode /*A*/) -> A(fd)
-_open:
-	ld	b, a			; B = mode
-	ld	c, #4			; SYS_OPEN
-	rst	#0x30
-	ret
-
-	;; void close(unsigned char fd /*A*/)
-_close:
-	ld	b, a
-	ld	c, #5			; SYS_CLOSE
-	rst	#0x30
-	ret
-
-	;; int fgetc(unsigned char fd /*A*/) -> BC (byte, or -1 at EOF)
-_fgetc:
-	ld	b, a
-	ld	c, #12			; SYS_GETB
-	rst	#0x30
-	jr	c, 1$
-	ld	c, a
-	ld	b, #0
-	ret
-1$:	ld	bc, #0xffff
-	ret
-
-	;; void fputc(unsigned char fd /*A*/, char ch /*E*/)
-	;; byte goes to the kernel in E (the trap clobbers A during dispatch)
-_fputc:
-	ld	b, a			; B = fd  (ch stays in E)
-	ld	c, #13			; SYS_PUTB
-	rst	#0x30
-	ret
-
-	;; unsigned char flist(unsigned char slot /*A*/, char *namebuf /*DE*/) -> A
-_flist:
-	ld	b, a
-	ld	c, #14			; SYS_LIST
-	rst	#0x30
-	ret
-
-	;; void fremove(const char *name /*DE*/)
-_fremove:
-	ld	c, #15			; SYS_REMOVE
-	rst	#0x30
-	ret
-
-	.globl _fork, _exec, _wait, _setin, _setout, _lookup
-	;; unsigned char fork(void) -> A (child pid in parent, 0 in child)
-_fork:
-	ld	c, #1			; SYS_FORK
-	rst	#0x30
-	ret
-	;; void exec(unsigned char id /*A*/) - never returns
-_exec:
-	ld	b, a
-	ld	c, #6			; SYS_EXEC
-	rst	#0x30
-	ret
-	;; unsigned char wait(void) -> A (reaped pid)
-_wait:
-	ld	c, #7			; SYS_WAIT
-	rst	#0x30
-	ret
-	;; void setin(unsigned char fd /*A*/)
-_setin:
-	ld	b, a
-	ld	c, #17			; SYS_SETIN
-	rst	#0x30
-	ret
-	;; void setout(unsigned char fd /*A*/)
-_setout:
-	ld	b, a
-	ld	c, #18			; SYS_SETOUT
-	rst	#0x30
-	ret
-	;; unsigned char lookup(const char *name /*DE*/) -> A (prog id or $FF)
-_lookup:
-	ld	c, #19			; SYS_LOOKUP
-	rst	#0x30
-	ret
-
-	.globl _kill, _psget, _progname
-	;; unsigned char kill(unsigned char pid /*A*/) -> A (0 ok, $FF fail)
-_kill:
-	ld	b, a
-	ld	c, #9			; SYS_KILL
-	rst	#0x30
-	ret
-	;; unsigned char psget(unsigned char slot /*A*/, unsigned char *buf /*DE*/) -> A
-_psget:
-	ld	b, a
-	ld	c, #20			; SYS_PS
-	rst	#0x30
-	ret
-	;; void progname(unsigned char id /*A*/, char *buf /*DE*/)
-_progname:
-	ld	b, a
-	ld	c, #21			; SYS_PROGNAME
-	rst	#0x30
-	ret
-
-	.globl _yield, _reap
-	;; void yield(void)
-_yield:
-	ld	c, #11			; SYS_YIELD
-	rst	#0x30
-	ret
-	;; unsigned char reap(void) -> A (reaped pid, or 0)
-_reap:
-	ld	c, #22			; SYS_REAP
-	rst	#0x30
-	ret
-
-	.globl _bfill, _bpeek, _bpeek2
-	;; void bfill(unsigned char block /*A*/, unsigned char byte /*E*/)
-_bfill:
-	ld	b, a
-	ld	c, #23			; SYS_BFILL
-	rst	#0x30
-	ret
-	;; unsigned char bpeek(unsigned char block /*A*/) -> A
-_bpeek:
-	ld	b, a
-	ld	e, #0
-	ld	c, #24			; SYS_BPEEK
-	rst	#0x30
-	ret
-	;; unsigned char bpeek2(unsigned char block /*A*/, unsigned char off /*E*/) -> A
-_bpeek2:
-	ld	b, a
-	ld	c, #24			; SYS_BPEEK (off already in E)
-	rst	#0x30
-	ret
-
-
-	.globl _mkdir, _chdir
-	;; unsigned char mkdir(const char *path /*DE*/) -> A (0 ok / $FF)
-_mkdir:
-	ld	c, #25			; SYS_MKDIR
-	rst	#0x30
-	ret
-	;; unsigned char chdir(const char *path /*DE*/) -> A (0 ok / $FF)
-_chdir:
-	ld	c, #26			; SYS_CHDIR
-	rst	#0x30
-	ret
-
-	.globl _opendir
-	;; unsigned char opendir(const char *path /*DE*/) -> A (0 ok / $FF)
-_opendir:
-	ld	c, #27			; SYS_OPENDIR
-	rst	#0x30
-	ret
-
-	.globl _poweroff
-	;; void poweroff(void) - execute the emulator's clean-exit opcode ($ED)
-_poweroff:
-	.db	0xED
-1$:	jr	1$