QB45, come here, this is your question! - China DOS Union Forum

====== In your message of 2003-10-8 17:30:48 you wrote: ======
I happened to run into you while I have some questions about system programming,
how do you write a program for 800*600*16-bit color, refresh rate 75HZ?
How do you write a program that rewrites BIOS contents.
How do you write a program that reads a hard disk larger than 8.4GB.
I don't want the original program, just give me the interrupt entry, exit, and call parameters. If it uses I/O ports, just state them directly!

=====================================
For 800*600, 16-bit color, use the following interrupt:
mov ax,4f02h
mov bx,102h
int 10H
That is, use interrupt 10H. AX means using VESA mode, BX is the display mode to set.
I have written a BMP decoding program before, but portability has never been solved!
As for refresh rate, I don't know how to control it either!
Hoping experts can give some advice!
//*****************************************************//
Rewriting BIOS contents:
It should be rewriting CMOS contents, right? Generally it's writing to port 0X70 or 0X71!
//******************************************************//

Controlling a hard disk larger than 8.4G:
http://220.195.149.80:8080/view.asp?file=309
I can only give you this thing, I don't remember a lot of it too clearly anymore, hehe!
//*********************************************************//

Really sorry, I always look this stuff up when writing code, I rarely remember it, hehe!
If there are mistakes, please forgive me a lot!

Oh right, it seems you're not using only QB, are you? These things are pretty hard to do with QB, right?!

Thanks for your reply, it helped me a lot!
What are the address and rules for video memory under VESA mode? How is its palette constructed?

Rewriting BIOS contents is not CMOS, it's the kind CIH destroys.
The BIOS stores programs, while the CMOS stores data!

TNND, what's going on, my IE suddenly crashed, and the reply I had just written is all gone, 55555555555555555,
I'll write it next time! What a pain!

OK, let me recommend another website to you, brother, but you'll need some C language foundation! http://tc256.cn.st/

One word: "Awesome"! No need to say more!

The following is quoted from xy_god at 2003-10-8 19:38:02:
TNND, what's going on, my IE suddenly crashed, and the reply I had just written is all gone, 55555555555555555,
Next time I'll write it! What a pain!

When writing a long piece, it's best to write it in Notepad and save once every ten minutes...

Writing a program to read an 8.4GB hard disk is very simple, DOS already supports large hard disks to begin with.

HIMEM+QB7.1 supports 4G memory?!

defrag, it doesn't seem like I asked this question!
But qb4.5+HIMEM also supports 4GB memory
Without +himem it also supports 4GB memory, it's just more troublesome

Floor1　xy_god	Posted 2003-10-08 00:00
中级用户　Posts 56　Credits 276
====== In your message of 2003-10-8 17:30:48 you wrote: ====== I happened to run into you while I have some questions about system programming, how do you write a program for 80060016-bit color, refresh rate 75HZ? How do you write a program that rewrites BIOS contents. How do you write a program that reads a hard disk larger than 8.4GB. I don't want the original program, just give me the interrupt entry, exit, and call parameters. If it uses I/O ports, just state them directly! ===================================== For 800600, 16-bit color, use the following interrupt: mov ax,4f02h mov bx,102h int 10H That is, use interrupt 10H. AX means using VESA mode, BX is the display mode to set. I have written a BMP decoding program before, but portability has never been solved! As for refresh rate, I don't know how to control it either! Hoping experts can give some advice! //**************************************************// Rewriting BIOS contents: It should be rewriting CMOS contents, right? Generally it's writing to port 0X70 or 0X71! //**************************************************// Controlling a hard disk larger than 8.4G: http://220.195.149.80:8080/view.asp?file=309 I can only give you this thing, I don't remember a lot of it too clearly anymore, hehe! //*******************************************************// Really sorry, I always look this stuff up when writing code, I rarely remember it, hehe! If there are mistakes, please forgive me a lot!

Floor2　xy_god	Posted 2003-10-08 00:00
中级用户　Posts 56　Credits 276
Oh right, it seems you're not using only QB, are you? These things are pretty hard to do with QB, right?!

Floor3　qb45	Posted 2003-10-08 00:00
高级用户　Posts 194　Credits 677
Thanks for your reply, it helped me a lot! What are the address and rules for video memory under VESA mode? How is its palette constructed? Rewriting BIOS contents is not CMOS, it's the kind CIH destroys. The BIOS stores programs, while the CMOS stores data!

Floor4　xy_god	Posted 2003-10-08 00:00
中级用户　Posts 56　Credits 276
TNND, what's going on, my IE suddenly crashed, and the reply I had just written is all gone, 55555555555555555, I'll write it next time! What a pain!

Floor5　xy_god	Posted 2003-10-08 00:00
中级用户　Posts 56　Credits 276
OK, let me recommend another website to you, brother, but you'll need some C language foundation! http://tc256.cn.st/

Floor6　qb45	Posted 2003-10-10 00:00
高级用户　Posts 194　Credits 677
One word: "Awesome"! No need to say more!

Floor7　iceboy	Posted 2003-10-10 00:00
银牌会员　Posts 512　Credits 1,681
*The following is quoted from xy_god at 2003-10-8 19:38:02:* TNND, what's going on, my IE suddenly crashed, and the reply I had just written is all gone, 55555555555555555, Next time I'll write it! What a pain! When writing a long piece, it's best to write it in Notepad and save once every ten minutes...

Floor8　Wengier	Posted 2003-10-10 00:00
系统支持　Posts 10,521　Credits 27,736
Writing a program to read an 8.4GB hard disk is very simple, DOS already supports large hard disks to begin with.

Floor9　defrag	Posted 2005-07-26 14:57
中级用户　Posts 570　Credits 456
HIMEM+QB7.1 supports 4G memory?!

Floor10　qb45	Posted 2005-07-30 10:44
高级用户　Posts 194　Credits 677
defrag, it doesn't seem like I asked this question! But qb4.5+HIMEM also supports 4GB memory Without +himem it also supports 4GB memory, it's just more troublesome