diff options
| -rw-r--r-- | sys/src/9/pc/cga.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/sys/src/9/pc/cga.c b/sys/src/9/pc/cga.c index b07652b0c..528db05f4 100644 --- a/sys/src/9/pc/cga.c +++ b/sys/src/9/pc/cga.c @@ -169,14 +169,47 @@ cgascreenputs(char* s, int n) unlock(&cgascreenlock); } +static void +cgatokmesg(void) +{ + int i, n; + char *p; + + ilock(&kmesg.lk); + n = kmesg.n; + for(i = cgapos-2; i >= 0 && n < sizeof kmesg.buf-UTFmax-1; i -= 2){ + if((i % Width) == Width-2) + n++; + n += runelen(cp437[CGASCREENBASE[i]]); + } + n -= kmesg.n; + if(n > 0){ + memmove(kmesg.buf+n, kmesg.buf, kmesg.n); + kmesg.n += n; + p = kmesg.buf; + for(i += 2; i >= 0 && i < cgapos && p < kmesg.buf+n; i += 2){ + p += runetochar(p, &cp437[CGASCREENBASE[i]]); + if((i % Width) == Width-2) + *p++ = '\n'; + } + } + iunlock(&kmesg.lk); +} + void screeninit(void) { - cgapos = cgaregr(0x0E)<<8; cgapos |= cgaregr(0x0F); cgapos *= 2; + if(cgapos >= Width*Height){ + cgapos = 0; + movecursor(); + } + + cgatokmesg(); + screenputs = cgascreenputs; } |