MINIX 1.7.5
That was a boring evening when I for the second time tried to install MINIX on my IBM PS/2 8530-286. And unfortunatelly, only with version 1.7.5 I could complete the setup program with pcem (or QEMU?). There were some issues to work with this, but now after fixing them, it runs almonst fine.
Compilation results
Size
text data bss size
37968 5394 26266 69628 ../kernel/kernel
11888 1052 16318 29258 ../mm/mm
27376 1960 57794 87130 ../fs/fs
6144 1890 1088 9122 init
------ ------ ------ -------
83376 10296 101466 195138 total
Time
(Next time I'll use time instead of date)
Wed Jun 3 21:30:41 MET DST 2020
Wed Jun 3 21:57:57 MET DST 2020
Fixed Issues
Disk
Of course MINIX can't understand my compact flash. But relying
on XTIDE BIOS with switching back to the real mode system
works... slow, but works. So, hd=bios boot monitor parameter
fixes the issue (or, at least, postpones the actual solution).
Keyboard with IBM PS/2 Model 30-286
My lovely Model M keyboard was not working with MINIX (but in pcem everything was fine...). I found on google groups, that the problem can be caused by the famous A20 gate. And I succeed to run MINIX in the real mode... But of course I wanted to run it in protected mode to have full access to the memory (1MB I have). So, finally, I fixed the issue (hint: A20 must be controlled in the PS/2 style, not in AT style, unusual for the Model 30).
Features
Dual-screen MINIX
I have a monochrome (IBM 5151-like) monitor, and obviously I want to use it with my PS/2. But of course it has a VGA output and VGA controller on board, and it's impossible to switch it off. But then I want to use two monitors simultaneously! Now it almost works, but I have a bug with the not-wiped last line during scrolling.
Bug list
Not-wiped last line during scrolling.Monochrome display doesn't change the cursor positionTTY driver doesn't work in parallel for different screensnot a bug