1. BL, BH etc...
- Posted by Mike Fowler <stoner at NELSUN.GEN.NZ> Aug 29, 1997
- 645 views
Hello all... I've been making some handy mouse routines usding the dos interrupt #33, but theres one that requires REG_AL and REG_AH to store information, but machine.e only has REG_AX = 7 etc. as constants. Does anyone out there know what REG_BL, REG_BH etc are? thanks heaps :) Mike Fowler - mike.fowler at nelsun.gen.nz o__ --- _,>/'_ --- (_) \(_) --- Tip for the month: Buy a flatbed scanner - great mouse pads.
2. Re: BL, BH etc...
- Posted by Greg Harris <blackdog at CDC.NET> Aug 29, 1997
- 636 views
> From: Mike Fowler <stoner at NELSUN.GEN.NZ> > Hello all... > I've been making some handy mouse routines usding the dos interrupt #33, > but theres one that requires REG_AL and REG_AH to store information, but > machine.e only has REG_AX = 7 etc. as constants. > > Does anyone out there know what REG_BL, REG_BH etc are? > > thanks heaps :) Say you want Interrupt #10, Service #10, Function #07. AH = #10 AL = #07 then, regs[REG_AX] = #1007 regs = dos_interrupt(#10, regs) Each register is 16 bits wide and can be divided into high and low. REG_BL is REG_BX low 8 bits REG_BH is REG_BX high 8 bits Now have I confused you? Greg Harris
3. Re: BL, BH etc...
- Posted by Mike Fowler <stoner at NELSUN.GEN.NZ> Aug 29, 1997
- 615 views
- Last edited Aug 30, 1997
MF> I've been making some handy mouse routines usding the dos interrupt MF> #33, but theres one that requires REG_AL and REG_AH to store MF> information, but machine.e only has REG_AX = 7 etc. as constants. MF> Does anyone out there know what REG_BL, REG_BH etc are? GH> Say you want Interrupt #10, Service #10, Function #07. GH> AH = #10 GH> AL = #07 GH> then, GH> regs[REG_AX] = #1007 GH> regs = dos_interrupt(#10, regs) okay - ive got that.. thanks :) GH> Each register is 16 bits wide and can be divided into high and low. GH> REG_BL is REG_BX low 8 bits GH> REG_BH is REG_BX high 8 bits GH> Now have I confused you? maybe... i _think_ i understand now... so if, say, REG_AX = #3F, then REG_AL = #3, and REG_AH = #F ??? or am i dreaming? Thanks again :) Mike Fowler - mike.fowler at nelsun.gen.nz o__ --- _,>/'_ --- (_) \(_) --- Tip for the month: Buy a flatbed scanner - great mouse pads.
4. Re: BL, BH etc...
- Posted by Jacques Deschenes <desja at GLOBETROTTER.QC.CA> Aug 29, 1997
- 619 views
At 22:53 29-08-97 GMT, you wrote: >---------------------- Information from the mail header ----------------------- >Sender: Euphoria Programming for MS-DOS <EUPHORIA at >MIAMIU.ACS.MUOHIO.EDU> >Poster: Mike Fowler <stoner at NELSUN.GEN.NZ> >Organization: NelSun BBS >Subject: Re: BL, BH etc... >------------------------------------------------------------------------------- > >MF> I've been making some handy mouse routines usding the dos interrupt >MF> #33, but theres one that requires REG_AL and REG_AH to store >MF> information, but machine.e only has REG_AX = 7 etc. as constants. >MF> Does anyone out there know what REG_BL, REG_BH etc are? >GH> Say you want Interrupt #10, Service #10, Function #07. >GH> AH = #10 >GH> AL = #07 >GH> then, >GH> regs[REG_AX] = #1007 >GH> regs = dos_interrupt(#10, regs) > >okay - ive got that.. thanks :) > >GH> Each register is 16 bits wide and can be divided into high and low. >GH> REG_BL is REG_BX low 8 bits >GH> REG_BH is REG_BX high 8 bits > >GH> Now have I confused you? > >maybe... i _think_ i understand now... so if, say, REG_AX = #3F, then >REG_AL = #3, and REG_AH = #F ??? > >or am i dreaming? You're dreaming! To get the high part of a register (AH,BH,CH,DH) you should multiply by 256 not 16. say you want to put 45 in AH the r[REG_AX] = 45*256 Jacques Deschenes Baie-Comeau, Quebec Canada desja at globetrotter.qc.ca
5. Re: BL, BH etc...
- Posted by Daniel Berstein <danielberstein at USA.NET> Aug 30, 1997
- 643 views
> maybe... i _think_ i understand now... so if, say, REG_AX =3D #3F, then > REG_AL =3D #3, and REG_AH =3D #F ??? > > or am i dreaming? #=B73F is equal to #003F, so AH=3D#00 and AL=3D#3F, it isn't that confusing... Regards, Daniel Berstein danielberstein at usa.net http://www.geocities.com/SiliconValley/Heights/9316
6. Re: BL, BH etc...
- Posted by Mike Fowler <stoner at NELSUN.GEN.NZ> Aug 30, 1997
- 646 views
GH> REG_BH is REG_BX high 8 bits GH> Now have I confused you? MF> maybe... i _think_ i understand now... so if, say, REG_AX = #3F, MF> then REG_AL = #3, and REG_AH = #F ??? MF> or am i dreaming? JD> You're dreaming! JD> To get the high part of a register (AH,BH,CH,DH) you should JD> multiply by 256 not 16. say you want to put 45 in AH the JD> r[REG_AX] = 45*256 thanks, Jacques. I've got it now. (at long last :) so its back to the coding, i guess :) I'll post my mouse routines ASAP, plus my other works :) Mike Fowler - mike.fowler at nelsun.gen.nz o__ --- _,>/'_ --- (_) \(_) --- Tip for the month: Buy a flatbed scanner - great mouse pads.