VOGONS


8088

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First post, by PotatoGodXtreme

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so i got pcem setup on my linux i got the proper rom all set up as well, i plan on running a 8088 machine with vga 😁

Reply 2 of 9, by PotatoGodXtreme

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of course the specs XDD
im using AMI XT Machine (8088)
Cpu clocked at 8x
8087 as FPU
640kbps RAM
2x drives of IDE XITDE 32MB
and last but most important VGA :DDD

Reply 3 of 9, by Cyberdyne

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No pictures, don't belive you.

PS. Am I missing something?

I am aroused about any X86 motherboard that has full functional ISA slot. I think i have problem. Not really into that original (Turbo) XT,286,386 and CGA/EGA stuff. So just a DOS nut.
PS. If I upload RAR, it is a 16-bit DOS RAR Version 2.50.

Reply 4 of 9, by PotatoGodXtreme

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769eeb2f988baba5e5e34e06727e157f.jpg

BEHOLDD!
i installed MS DOS 5.00
😁 installed the mouse driver as well

Reply 5 of 9, by theelf

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Dont understand post, vga in 8088 is not very common, but not unusual

I have a 8088 with trident vga card and works fine

Reply 6 of 9, by superfury

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VGA indeed by itself isn't a problem and should run fine. One of the problems, however, is that various (at least Windows drivers, maybe other software as well) require 80186 opcodes to run properly (or a NEC V30 or 286 and higher CPU).

Author of the UniPCemu emulator.
UniPCemu Git repository
UniPCemu for Android, Windows, PSP, Vita and Switch on itch.io

Reply 7 of 9, by GloriousCow

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superfury wrote on 2024-10-11, 09:44:

VGA indeed by itself isn't a problem and should run fine. One of the problems, however, is that various (at least Windows drivers, maybe other software as well) require 80186 opcodes to run properly (or a NEC V30 or 286 and higher CPU).

patched drivers are available for EGA and VGA
https://forum.vcfed.org/index.php?threads/win … -8088-xt.35866/
https://forum.vcfed.org/index.php?threads/win … r-8088.1245597/

MartyPC: A cycle-accurate IBM PC/XT emulator | https://github.com/dbalsom/martypc

Reply 8 of 9, by mkarcher

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superfury wrote on 2024-10-11, 09:44:

VGA indeed by itself isn't a problem and should run fine. One of the problems, however, is that various (at least Windows drivers, maybe other software as well) require 80186 opcodes to run properly (or a NEC V30 or 286 and higher CPU).

As this thread is about XT-class computers and the 8088, it should be mentioned that the V30 is not a strict requirement to execute 80186 opcodes. A V20, which is meant as drop-in replacement for the 8088, is sufficient even if the number is lower.

Reply 9 of 9, by Jo22

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mkarcher wrote on 2024-10-12, 06:47:
superfury wrote on 2024-10-11, 09:44:

VGA indeed by itself isn't a problem and should run fine. One of the problems, however, is that various (at least Windows drivers, maybe other software as well) require 80186 opcodes to run properly (or a NEC V30 or 286 and higher CPU).

As this thread is about XT-class computers and the 8088, it should be mentioned that the V30 is not a strict requirement to execute 80186 opcodes. A V20, which is meant as drop-in replacement for the 8088, is sufficient even if the number is lower.

Hi, I think V30 was being mentioned because it's the umbrella term or generic term, like 8086 is.
Personally, I wouldn't have thought of or mentioned the 8088/V20, either.
Because V20 and 8088 are cut-down versions of the role model, just like 386SX and 486SX are.
And softwarewise, V20/8088 and V30/8086 are about the same.
Ok, probably I'm stating the obvious here. 😅

What's also interesting, the Schneider PC1512/PC1640, Olivetti M24 and the Robotron A7100/A7150/EC1834 all use the full version of the processor, the 8086. 😃
They're more than ordinary XTs, though. PCem/86Box emulate some of them.
Might be interesting to the OP to play with!

(PC-9801 series do use V30, too. Also for backwards compatibility.
Some PC-98 models with higher CPUs had an secondary V30 as fallback.)

PS: The "generic XT" allows 704 KB of memory. Can be useful for Hercules/CGA configuration.
The utility 704K helps to make it usable if BIOS support for 704KB is missing (the case on some real XTs).
It's here: Re: 80x86/Vxx PC emulators with x87, EMS, UMBs and no artificial 640KiB limit ?

Edit: There's another CPU that's not being mentioned yet.
The NEC μPD9002, which was used in the NEC PC-88VA. It was an V30/V50 core with full Z80 compatibility.
Many sources say it's an NEC V50, but that one has the number μPD70216 (V30 is μPD70116).

Edit: The lower end IBM PS/2 Model 30 has an 8086, too. With MCGA graphics (VGA subset).
It's not an XT computer per se, though. The PS/2 line differs from both both PC/XT and PC/AT platform.

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