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View Full Version : IBM PC XT meets the 21st Century!



martinw
April 10th, 2017, 11:47 PM
IBM PC XT (assembled 1986 in Greenock Scotland), 4K Samsung Monitor, Sound Blaster 2 Sound Card, Dell PC Speakers (including sub-woofer), XT IDE CF Optima 2GB storage, Samsung 3.5 inch floppy drive.

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https://youtu.be/_SEKOM-O6Rk

I think it's looking (and sounding) pretty good :D

Not exactly true to the history of the machine but it now makes it more use-able with these subtle (haha) additions for the 21st century, in my very humble opinion :cool:

Martin

Rick Ethridge
April 11th, 2017, 12:41 AM
Wot! No VGA?

martinw
April 11th, 2017, 12:58 AM
Wot! No VGA?

It's a fair point Rick, I'm torn to tell you the truth, I don't want to update it to the point it looks like a 90's 00's PC, I just wanted to accentuate its attributes and not remove the essential DNA that is within it.

I may change my mind though ;)

Martin

Malc
April 11th, 2017, 01:10 AM
I use VGA and LCD's on my XT's, My vintage eyes prefer it, I have the original CGA, MDA Cards and monitors, So it's an easy swap if i wanted to go back a bit which i sometimes do, I don't have a problem doing easily reversible upgrades.

martinw
April 11th, 2017, 01:18 AM
I use VGA and LCD's on my XT's, My vintage eyes prefer it, I have the original CGA, MDA Cards and monitors, So it's an easy swap if i wanted to go back a bit which i sometimes do, I don't have a problem doing easily reversible upgrades.

What would be a decent, yet early, VGA card that would go/play nicely with an XT?

Martin

Malc
April 11th, 2017, 01:42 AM
I have 16-bit VGA cards in my XT's, Had them for years, They suit my needs, As for a Decent VGA card, If you mean for playing games, I don't know, I have zero interest in playing games on a PC, There has been some threads on here in the past on VGA cards and Modem7 has a webpage on a few compatible cards IIRC.

martinw
April 11th, 2017, 01:47 AM
I have 16-bit VGA cards in my XT's, Had them for years, They suit my needs, As for a Decent VGA card, If you mean for playing games, I don't know, I have zero interest in playing games on a PC, There has been some threads on here in the past on VGA cards and Modem7 has a webpage on a few compatible cards IIRC.

Thanks Malc I'll check them out.

Martin

Scali
April 11th, 2017, 02:13 AM
I had an 8-bit Paradise PVGA1A card in my 8088 back in the day.
Bought the same (or at least a similar looking) card recently (the original 8088, a Commodore PC10-III, was sold many years ago, together with its VGA card).
It works fine in my IBM 5160 and my two 8088 clones (Philips P3105 and Commodore PC20-III).
It's interesting that it supports reasonably decent CGA emulation (proper palettes), which most VGA cards do not. If I'm not mistaken, it even has a Hercules emulation mode, which would again be rare on VGA cards.

It seems that in CGA mode, it emulates the 6845 state at 60 Hz, while the output is actually 70 Hz on the screen. So games that would use vertical-blank timing, would run at the original CGA speed, rather than a bit too fast, as would happen on regular VGA.
Raster effects will not work however, so CGADEMO looks weird. But they don't work on other VGA cards either, because they don't support the palette registers in the first place.

martinw
April 11th, 2017, 02:46 AM
I had an 8-bit Paradise PVGA1A card in my 8088 back in the day.
Bought the same (or at least a similar looking) card recently (the original 8088, a Commodore PC10-III, was sold many years ago, together with its VGA card).
It works fine in my IBM 5160 and my two 8088 clones (Philips P3105 and Commodore PC20-III).
It's interesting that it supports reasonably decent CGA emulation (proper palettes), which most VGA cards do not. If I'm not mistaken, it even has a Hercules emulation mode, which would again be rare on VGA cards.

It seems that in CGA mode, it emulates the 6845 state at 60 Hz, while the output is actually 70 Hz on the screen. So games that would use vertical-blank timing, would run at the original CGA speed, rather than a bit too fast, as would happen on regular VGA.
Raster effects will not work however, so CGADEMO looks weird. But they don't work on other VGA cards either, because they don't support the palette registers in the first place.

Thank you Scali, just bought one on EBay :D

Do I need to set any switches on the motherboard to get this card to work in place of the CGA card I currently have?

Martin

Scali
April 11th, 2017, 03:14 AM
Do I need to set any switches on the motherboard to get this card to work in place of the CGA card I currently have?

Yes, see here: http://www.minuszerodegrees.net/5160/misc/5160_motherboard_switch_settings.htm
You need to set switches 5 and 6 to 'on', so that the onboard CGA BIOS is disabled (CGA and MDA are implemented in the motherboard BIOS, not on the video card itself).

martinw
April 11th, 2017, 03:25 AM
Yes, see here: http://www.minuszerodegrees.net/5160/misc/5160_motherboard_switch_settings.htm
You need to set switches 5 and 6 to 'on', so that the onboard CGA BIOS is disabled (CGA and MDA are implemented in the motherboard BIOS, not on the video card itself).

Thanks Scali, I'll post how I get on :)

nc_mike
April 11th, 2017, 04:17 AM
Terrific! Now, drop one of these into that XT with a piggyback memory card, pop in a $25 33/66Mhz 133-pin CPU, and you can run Windows 3.1!

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.XIntel+Inb oard.TRS0&_nkw=Intel+Inboard&_sacat=0

It is like the Lays potato chip slogan - can't have just one.... :-)

Apologize not for upgrading any system and not maintaining 'purity' - there are far more than enough of those in existence when it comes to IBM PCs easily had.

Regards,
Mike

Malc
April 11th, 2017, 04:39 AM
Ouch! at that price, My 486 dos box is running 3.1 and it didn't cost me anything.

martinw
April 11th, 2017, 05:00 AM
Terrific! Now, drop one of these into that XT with a piggyback memory card, pop in a $25 33/66Mhz 133-pin CPU, and you can run Windows 3.1!

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.XIntel+Inb oard.TRS0&_nkw=Intel+Inboard&_sacat=0

It is like the Lays potato chip slogan - can't have just one.... :-)

Apologize not for upgrading any system and not maintaining 'purity' - there are far more than enough of those in existence when it comes to IBM PCs easily had.

Regards,
Mike

Wow, now that's a chunk of change!

But thanks for the ideas though, and yes it's easy to get too precious about ones mass produced computers I guess.

Martin

Stone
April 11th, 2017, 05:11 AM
Wow, now that's a chunk of change!Even Baron Victor von Frankenstein got his monster going for less than that! :-) :-) :-)

martinw
April 11th, 2017, 05:26 AM
Even Baron Victor von Frankenstein got his monster going for less than that! :-) :-) :-)

HaHa :)

astamp
April 12th, 2017, 04:55 PM
Hi Martin,

Are you using the composite output of the CGA or are you using a converter on the RGBI output?

Have you played with displaying 80 column text or "hi res" 640x200 monochrome?

--Andy

martinw
April 13th, 2017, 12:11 AM
That's the VGA card installed now, seems to be working great.

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I couldn't get it to work directly through the VGA to HDMI converter I have so I'm using an older LCD monitor for the moment.

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Martin

martinw
April 13th, 2017, 11:04 AM
VGA ... wide LCD, loving it :)

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Thank you for the great advice guys :)

Martin

martinw
April 14th, 2017, 07:38 AM
Hi Martin,

Are you using the composite output of the CGA or are you using a converter on the RGBI output?

Have you played with displaying 80 column text or "hi res" 640x200 monochrome?

--Andy

Hi Andy,

I was using this setup (i.e. a converter on the RGBI output).

http://www.vcfed.org/forum/showthread.php?56923-CGA-on-a-4K-monitor

Now I have a VGA card in the XT.

I must admit I'm not than keen on monochrome.

Martin

stynx
April 14th, 2017, 10:55 AM
Terrific! Now, drop one of these into that XT with a piggyback memory card, pop in a $25 33/66Mhz 133-pin CPU, and you can run Windows 3.1!

http://www.ebay.com/sch/i.html?_from=R40&_trksid=p2050601.m570.l1313.TR0.TRC0.H0.XIntel+Inb oard.TRS0&_nkw=Intel+Inboard&_sacat=0

It is like the Lays potato chip slogan - can't have just one.... :-)

Apologize not for upgrading any system and not maintaining 'purity' - there are far more than enough of those in existence when it comes to IBM PCs easily had.

Regards,
Mike

37825

:-)

bobba84
April 16th, 2017, 09:25 PM
37825

:-)

Hahaha! I'd rather the InBoard!

martinw
April 23rd, 2017, 10:37 AM
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:cool:

Stone
April 23rd, 2017, 12:49 PM
37941Hey, that FPU looks kinda familiar. :-)

martinw
April 23rd, 2017, 10:17 PM
All the way from the US of A; thank you :D