diff options
| -rw-r--r-- | Makefile | 13 | ||||
| -rw-r--r-- | ldlinux.asm | 18 |
2 files changed, 24 insertions, 7 deletions
@@ -109,3 +109,16 @@ release: gzip -9 > syslinux-$(VERSION).tar.gz cd release/syslinux-$(VERSION) ; \ zip -9r ../syslinux-$(VERSION).zip * + +prerel: + -rm -rf release/syslinux-$(VERSION)-$(DATE) + -rm -f release/syslinux-$(VERSION)-$(DATE).* + mkdir -p release/syslinux-$(VERSION)-$(DATE) + cp $(SOURCES) $(DOCS) $(OTHER) release/syslinux-$(VERSION)-$(DATE) + make -C release/syslinux-$(VERSION)-$(DATE) clean + make -C release/syslinux-$(VERSION)-$(DATE) DATE="$(DATE)" + make -C release/syslinux-$(VERSION)-$(DATE) dist + cd release ; tar cvvf - syslinux-$(VERSION)-$(DATE) | \ + gzip -9 > syslinux-$(VERSION)-$(DATE).tar.gz + cd release/syslinux-$(VERSION)-$(DATE) ; \ + zip -9r ../syslinux-$(VERSION)-$(DATE).zip * diff --git a/ldlinux.asm b/ldlinux.asm index d447b92f..d55268c7 100644 --- a/ldlinux.asm +++ b/ldlinux.asm @@ -651,6 +651,11 @@ getonesec: ; The "stupid patch area" gets replaced by the code ; mov bp,1 ; nop ... (BD 01 00 90 90...) when installing with ; the -s option. +; +; Stylistic note: use "xchg" instead of "mov" when the source is a register +; that is dead from that point; this saves space. However, please keep +; the order to dst,src to keep things sane. +; getlinsec: mov si,[bsSecPerTrack] ; @@ -658,18 +663,17 @@ getlinsec: ; up to 2^18 tracks, so we need to do this in two steps ; to produce a 32-bit quotient. ; - xchg di,ax ; DI <- LSW of LBA + xchg cx,ax ; CX <- LSW of LBA xchg ax,dx xor dx,dx ; DX:AX now == MSW of LBA push dx div si ; Obtain MSW of track # - xchg ax,di ; Save MSW of track, AX <- LSW of LBA - add ax,dx ; Add remainder from high word - pop dx ; DX <- 0, flags preserved! - adc dx,dx ; DX == 0, so DX <- CF ? 1 : 0 + xchg ax,cx ; Remainder -> MSW of new dividend + ; LSW of LBA -> LSW of new dividend + ; Quotient -> MSW of track # div si ; Obtain LSW of track #, remainder xchg cx,dx ; CX <- Sector index (0-based) - xchg dx,di ; MSW of track #; DX:AX now == track # + ; DX <- MSW of track # div word [bsHeads] ; Convert track to head/cyl ; ; Now we have AX = cyl, DX = head, CX = sector (0-based), @@ -2308,7 +2312,7 @@ enable_a20: out 060h, al kbc_delay: call empty_8042 push cx - mov cx,14h + mov cx, delaytime .delayloop: io_delay loop .delayloop pop cx |