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, 57 deletions

diff --git a/c/chat.c b/c/chat.c
deleted file mode 100644
index 987b336..0000000
--- a/c/chat.c
+++ /dev/null
@@ -1,57 +0,0 @@
-#include "netlib.h"
-/* chat: a link-port chat client. Incoming SLIP frames from the host gateway
-   print as messages; SELECT brings up the on-screen keyboard, type a line and
-   press START to send it. A poll loop interleaves receiving and typing so
-   messages arrive while you're not mid-line. */
-
-static char rxbuf[96];
-static unsigned char rxlen, rxin, rxesc;
-
-/* feed one non-blocking byte to the SLIP receiver; returns a frame length when
-   a whole frame has arrived (copied into out), else 0. */
-static unsigned char slip_poll(char *out) {
-    int b = srecv_nb();
-    unsigned char c, i, n;
-    if (b < 0) return 0;
-    c = (unsigned char)b;
-    if (c == SLIP_END) {
-        if (rxin && rxlen) {
-            n = rxlen;
-            for (i = 0; i < n; i++) out[i] = rxbuf[i];
-            rxlen = 0; rxin = 0; rxesc = 0;
-            return n;
-        }
-        rxin = 1; rxlen = 0; rxesc = 0;
-        return 0;
-    }
-    if (!rxin) return 0;
-    if (rxesc) {
-        if (c == SLIP_ESC_END) c = SLIP_END;
-        else if (c == SLIP_ESC_ESC) c = SLIP_ESC;
-        rxesc = 0;
-    } else if (c == SLIP_ESC) { rxesc = 1; return 0; }
-    if (rxlen < 96) rxbuf[rxlen++] = (char)c;
-    return 0;
-}
-
-void main(void) {
-    char line[64], frame[96];
-    unsigned char linelen = 0, n, i, c;
-    puts("chat: SELECT=keyboard  START=send"); nl();
-    for (;;) {
-        n = slip_poll(frame);              /* incoming message? */
-        if (n) {
-            for (i = 0; i < n; i++) putc(frame[i]);
-            nl();
-        }
-        c = pollin();                      /* typed a key? */
-        if (c == '\n') {
-            if (linelen) { slip_send(line, linelen); linelen = 0; }
-        } else if (c == 8) {
-            if (linelen) { linelen--; putc(8); }
-        } else if (c) {
-            if (linelen < 63) { line[linelen++] = (char)c; putc((char)c); }
-        }
-        yield();
-    }
-}