please dont rip this site

Function 90h Device Busy Loop (except PC, PCjr, XT)

entry AH 90h

AL type code:

00h disk

01h diskette

02h keyboard

03h PS/2 pointing device

80h network (ES:BX = pointer to network control block)

0FCh hard disk reset (PS/2)

0FDh diskette motor start

0FEh printer

ES:BX pointer to request block for type codes 80h through 0BFh

return CF 1 (set) if wait time satisfied

0 (clear) if driver must perform wait

note Used by NETBIOS

Type codes are allocated as follows:

00h-7Fh non-reentrant devices; OS must arbitrate access

80h-BFh reentrant devices; ES:BX points to a unique control block

C0h-FFh wait-only calls, no complementary int 15, fn91h call

file: /Techref/int/15f/90.htm, 0KB, , updated: 2001/5/3 13:15, local time: 2020/2/20 02:44,

 ©2020 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions?
Please DO link to this page! Digg it! / MAKE!

<A HREF=""> int 15f 90</A>

After you find an appropriate page, you are invited to your to this massmind site! (posts will be visible only to you before review) Just type in the box and press the Post button. (HTML welcomed, but not the <A tag: Instead, use the link box to link to another page. A tutorial is available Members can login to post directly, become page editors, and be credited for their posts.

Link? Put it here: 
if you want a response, please enter your email address: 
Attn spammers: All posts are reviewed before being made visible to anyone other than the poster.
Did you find what you needed?


Welcome to!

Site supported by
sales, advertizing,
& kind contributors
just like you!

Please don't rip/copy
(here's why

Copies of the site on CD
are available at minimal cost.

Welcome to!