4 ms·

PCjs: Virtual IBM PC

71 points by vmorgulis 11y ago

vmorgulis 11y ago
CRobots (programming game): http://tpoindex.github.io/crobots/pcjs/crobots-pcjs.html http://tpoindex.github.io/crobots/pcjs/crobots-pcjs.html
frik 11y ago
format a: does an endless loop. Edit: oh, going back I got an JS popup: Unable to restore disk 'PC-DOS 2.00 (Disk 1): sector (CHS=0:1:0) out of range (9 changes applied) After pressing the reset button: Non-System disk or disk error Replace and strike any key when ready I had to press load disk A button, to start fresh. Quite impressive. And then I just found out to load Windows 1 with mouse support. Wow. Made my day. Epic!
- danielconde 11y ago
  It's a major point to make sure errors are properly emulated as well. Same issue was dealt with in VMware Workstation as well, which managed to behave accurately for devices such as floppy disks.
arbuge 11y ago
Pretty cool - and accurate. In the IBM Model 5150, there was a bug in Microsoft's floating-point math routine of the PC's BASIC ROM chip. If you ask the system to divide 0.01 by 10, it displays 9.999999E-4, instead of the correct answer of 0.001. You can see this by launching into BASIC from the simulation and trying: print 0.01/10 compare this to for example: print 0.01/100 Dating myself here, but I still remember coding up quicksort programs in computer science class on these things, back in high school in the 80s.
- jerf 11y ago
  That's not really a "bug": http://0.30000000000000004.com/ http://0.30000000000000004.com/
  - khedoros 11y ago
    I know the point that you're making, but I'm not sure that the simulation has the 8087, or that the BASIC ROM would use it if it did. The software implementation has some interesting quirks: print 0.1/10 0.01 OK print 0.01/10 9.999999E-4 Ok print 0.01/5 0.002 Ok print 0.001/10 0.0001 Ok print 0.1+0.2 0.3 Ok
gtk40 11y ago
Can new versions of Word still open the .DOC files from Windows 1.0, such as on this emulator?
- yuhong 11y ago
  I believe that this is a different file format that would require a converter. The file extension was eventually changed to .WRI for this reason.
orbitingpluto 11y ago
A>Basic 10 PRINT "HELLO" 20 GOTO 10 <F2> HELLO x inf... 20 seconds of nostalgic entertainment
- bitwize 11y ago
  "Type 10 spacebar print spacebar shift-quote H E L L O shift-quote and press Enter." BEEP BEEP BEEP https://www.youtube.com/watch?v=ZhNX_tyBvq0 https://www.youtube.com/watch?v=ZhNX_tyBvq0
- jakejake 11y ago
  Don't forget the semi-colon on the end of line 10 to remove the line break and spread the message across the whole screen!
bluedino 11y ago
Something nostalgic about the speed of the display updates on old PC's like that. Typing 'dir' and watching things fly in line by line.
gtk40 11y ago
Can anyone use the OS/2 module? It just errors for me across several browsers.
deleted 11y ago
[deleted]
WalterBright 11y ago
Last month, I was cleaning some stuff out in the garage and found my IBM PC green screen monitor had fallen off the shelf and smashed on the floor. I had bought the PC back in 1983 or so. The end of an era for me, I guess. The weird thing is I thought DOS at the time was complicated. It looks trivial today, and I wonder why multiple people did not create independent operating systems from scratch for the PC.
castratikron 11y ago
Notice: remove your headphones before opening the page
castratikron 11y ago
Notice: remove your headphones before opening the page
13of40 11y ago
If you load the OS2 image and put DOS 2 disk 2 in the drive you can play Bill Gate's epic game "DONKEY.BAS". He was still bragging about that at the MS company meeting circa 2005 or so.
TazeTSchnitzel 11y ago
I'm sad that the music in MUSIC.BAS doesn't seem to work. No PC Speaker support, maybe?
orionblastar 11y ago
A friend of mine tried PCjs with classic BASIC games before. http://blastar.in/dell/poker/ http://blastar.in/dell/poker/ http://blastar.in/dell/slots/ http://blastar.in/dell/slots/ http://blastar.in/dell/bj/ http://blastar.in/dell/bj/ You just need to turn caps lock on because they are case sensitive. But they are BASICA compiled games from the 101 BASIC Games book.

71 points by vmorgulis 11y ago

CRobots (programming game): http://tpoindex.github.io/crobots/pcjs/crobots-pcjs.html http://tpoindex.github.io/crobots/pcjs/crobots-pcjs.html

frik 11y ago

format a: does an endless loop. Edit: oh, going back I got an JS popup: Unable to restore disk 'PC-DOS 2.00 (Disk 1): sector (CHS=0:1:0) out of range (9 changes applied) After pressing the reset button: Non-System disk or disk error Replace and strike any key when ready I had to press load disk A button, to start fresh. Quite impressive. And then I just found out to load Windows 1 with mouse support. Wow. Made my day. Epic!

danielconde 11y ago
It's a major point to make sure errors are properly emulated as well. Same issue was dealt with in VMware Workstation as well, which managed to behave accurately for devices such as floppy disks.

arbuge 11y ago

Pretty cool - and accurate. In the IBM Model 5150, there was a bug in Microsoft's floating-point math routine of the PC's BASIC ROM chip. If you ask the system to divide 0.01 by 10, it displays 9.999999E-4, instead of the correct answer of 0.001. You can see this by launching into BASIC from the simulation and trying: print 0.01/10 compare this to for example: print 0.01/100 Dating myself here, but I still remember coding up quicksort programs in computer science class on these things, back in high school in the 80s.

jerf 11y ago
That's not really a "bug": http://0.30000000000000004.com/ http://0.30000000000000004.com/
- khedoros 11y ago
  I know the point that you're making, but I'm not sure that the simulation has the 8087, or that the BASIC ROM would use it if it did. The software implementation has some interesting quirks: print 0.1/10 0.01 OK print 0.01/10 9.999999E-4 Ok print 0.01/5 0.002 Ok print 0.001/10 0.0001 Ok print 0.1+0.2 0.3 Ok

gtk40 11y ago

Can new versions of Word still open the .DOC files from Windows 1.0, such as on this emulator?

yuhong 11y ago
I believe that this is a different file format that would require a converter. The file extension was eventually changed to .WRI for this reason.

orbitingpluto 11y ago

A>Basic 10 PRINT "HELLO" 20 GOTO 10 <F2> HELLO x inf... 20 seconds of nostalgic entertainment

bitwize 11y ago
"Type 10 spacebar print spacebar shift-quote H E L L O shift-quote and press Enter." BEEP BEEP BEEP https://www.youtube.com/watch?v=ZhNX_tyBvq0 https://www.youtube.com/watch?v=ZhNX_tyBvq0
jakejake 11y ago
Don't forget the semi-colon on the end of line 10 to remove the line break and spread the message across the whole screen!

bluedino 11y ago

Something nostalgic about the speed of the display updates on old PC's like that. Typing 'dir' and watching things fly in line by line.

gtk40 11y ago

Can anyone use the OS/2 module? It just errors for me across several browsers.

deleted 11y ago

[deleted]

WalterBright 11y ago

Last month, I was cleaning some stuff out in the garage and found my IBM PC green screen monitor had fallen off the shelf and smashed on the floor. I had bought the PC back in 1983 or so. The end of an era for me, I guess. The weird thing is I thought DOS at the time was complicated. It looks trivial today, and I wonder why multiple people did not create independent operating systems from scratch for the PC.

castratikron 11y ago

Notice: remove your headphones before opening the page

castratikron 11y ago

Notice: remove your headphones before opening the page

13of40 11y ago

If you load the OS2 image and put DOS 2 disk 2 in the drive you can play Bill Gate's epic game "DONKEY.BAS". He was still bragging about that at the MS company meeting circa 2005 or so.

TazeTSchnitzel 11y ago

I'm sad that the music in MUSIC.BAS doesn't seem to work. No PC Speaker support, maybe?

orionblastar 11y ago

A friend of mine tried PCjs with classic BASIC games before. http://blastar.in/dell/poker/ http://blastar.in/dell/poker/ http://blastar.in/dell/slots/ http://blastar.in/dell/slots/ http://blastar.in/dell/bj/ http://blastar.in/dell/bj/ You just need to turn caps lock on because they are case sensitive. But they are BASICA compiled games from the 101 BASIC Games book.