China DOS Union

====== 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!

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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!
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Rewriting BIOS contents:
It should be rewriting CMOS contents, right? Generally it's writing to port 0X70 or 0X71!
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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!
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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