RealMode Segmentation questions for Emulator

[Octocontrabass]

That's very strange that it would work with AL=0x13 but not AL=0x0D. Those are both real video modes, and all VGA-compatible graphics cards should support them both.

[PearOs]

That's very strange that it would work with AL=0x13 but not AL=0x0D. Those are both real video modes, and all VGA-compatible graphics cards should support them both.

That's what I thought. I'm going to start a new thread for making a V8086 task. Writing this Emulator has been fun and I've learned a lot but I don't want to spend the rest of my life implementing stuff until this thing is 100% flawless. I would rather use V8086 since it exists and move onto another part of my system. But thank you so much for your help, I really appreciate it.

[Octocontrabass]

You're welcome. This was fun for me as well.

(Maybe I should write my own emulator now. )

[PearOs]

You're welcome. This was fun for me as well.

(Maybe I should write my own emulator now. )

Hahaha, it's a fun project. Very time consuming, and at times annoying but its cool to see the outcome. I just would rather use V86 and save some time plus it will run faster than my emulator ever could.

[Combuster]

That's very strange that it would work with AL=0x13 but not AL=0x0D. Those are both real video modes, and all VGA-compatible graphics cards should support them both.

That's what I thought. I'm going to start a new thread for making a V8086 task. Writing this Emulator has been fun and I've learned a lot but I don't want to spend the rest of my life implementing stuff until this thing is 100% flawless. I would rather use V8086 since it exists and move onto another part of my system. But thank you so much for your help, I really appreciate it.

Mode 0x0D is weird, in the sense that it's inferior to both mode 0x12 and 0x13. Plus I don't recall a VGA register that does horizontal doubling (needed not to burn out monitors). Bottom line here is that I wouldn't be surprised if emulators neglected such support.

Also, using a legacy VGA mode number as a parameter to a VBE call is merely optionally supported.

[PearOs]

That's very strange that it would work with AL=0x13 but not AL=0x0D. Those are both real video modes, and all VGA-compatible graphics cards should support them both.

That's what I thought. I'm going to start a new thread for making a V8086 task. Writing this Emulator has been fun and I've learned a lot but I don't want to spend the rest of my life implementing stuff until this thing is 100% flawless. I would rather use V8086 since it exists and move onto another part of my system. But thank you so much for your help, I really appreciate it.

Mode 0x0D is weird, in the sense that it's inferior to both mode 0x12 and 0x13. Plus I don't recall a VGA register that does horizontal doubling (needed not to burn out monitors). Bottom line here is that I wouldn't be surprised if emulators neglected such support.

Also, using a legacy VGA mode number as a parameter to a VBE call is merely optionally supported.

Oh I see, thanks Combuster. I guess in gonna try v8086 task but it seems the emulator was actually a little easier

Thanks, Matt