ack/plat/msdos386/libsys/sys_isreadyr.s

#
! $Source$
! $State$
! $Revision$

#include "libsysasm.h"

! Say whether a file descriptor is ready for input, i.e. reading from the
! fd will immediately return something.

.define __sys_isreadyr
__sys_isreadyr:
	mov ebx, esp
	mov eax, 0x4406
	mov ebx, 4(ebx)
	int 0x21
	jnc ok
	movb al, 0
ok:
	o16 cbw
	cwde
	ret
Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds. 2022-08-07 20:10:08 +00:00			`#`
			`! $Source$`
			`! $State$`
			`! $Revision$`

plat/msdos386: refactor, firm up, and optimize - refactor code for transfer buffer reads/writes, real mode int 0x21 calls, and assembler segment declarations - define transfer buffer size in one place - beef up error checking for transfer buffer operations (prevent buffer overflows) - also optimize such operations to transfer dword by dword where feasible 2022-08-26 17:20:56 +00:00			`#include "libsysasm.h"`
Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds. 2022-08-07 20:10:08 +00:00
			`! Say whether a file descriptor is ready for input, i.e. reading from the`
			`! fd will immediately return something.`

			`.define __sys_isreadyr`
			`__sys_isreadyr:`
Most of read and write now works; filename-based operations partially work; but there's a nasty memory corruption somewhere which needs investigating. 2022-08-18 22:08:57 +00:00			`mov ebx, esp`
Programs now start up and can write to the console, but crash when reading. 2022-08-17 22:24:08 +00:00			`mov eax, 0x4406`
			`mov ebx, 4(ebx)`
Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds. 2022-08-07 20:10:08 +00:00			`int 0x21`
			`jnc ok`
			`movb al, 0`
			`ok:`
Most of read and write now works; filename-based operations partially work; but there's a nasty memory corruption somewhere which needs investigating. 2022-08-18 22:08:57 +00:00			`o16 cbw`
			`cwde`
Cut-and-paste the msdos86 libsys so the msdos386 stuff now at least builds. 2022-08-07 20:10:08 +00:00			`ret`