More PS/2 upgrades! More RAM, More advanced SCSI!

Posted on September 29, 2023 by neozeed

So I had gotten this Boca Ram/2 card with 2MB of RAM, with space for an additional 6MB. Unfortunately trying to find matching memory has been a lost cause. Since the existing memory is 9 chip modules, I take that to mean it’s parity RAM, so I went shopping for much more available 3 chip modules.

I picked up 2x 1MB modules for £10.

Slotting them carefully into the ram card, taking great care as the clips are plastic!

Now from what I can remember being told is to never ever ever mix memory types like this. But logically I have to think that 9×1 = 4+4+1, right? RIGHT?!

I copied the @7A7A.ADF onto the reference disk image, slotted the card and booted up to the config, and toggled the card to 4M

I didn’t trust the auto-config, plus I just wanted to see what was there. Also I’ve always wondered if the PS/2 model 60 (or 30? 50z?) can slot higher density than the 256kb SIMM’s that IBM had used. I guess one day I’ll give it a shot.

Anyways thinking that this is about done, I save the config and reboot and now It’s Bocaram/2 issues.

Immediately, on reboot I get error 164.

164 POST detected a base memory or extended memory size mismatch error.

1. Run F1 Setup. Check System Summary menu for memory size change.
2. Run the Extended Memory Diagnostic tests.
IBM

Great.

Booting from the reference disk just crashes the PC.

Fantastic.

Pressing F1 however does let you boot, ignoring the issue.

After a bunch of digging I found this zip file with some utils. And just guessing br2pmems ‘fixes’ the CMOS settings allowing the machine to boot normally.

So now it’ll recognize the 5MB of RAM, and just boot normally. GREAT. But booting the reference disk still hangs the machine.

Which then brings me to the next upgrade:

The IBM SCSI with Cache aka the SPOCK. Since I ruined the one SCSI card, and ended up picking up a second card, but this time with the appropriate cable I’ve caused a massive market panic on Microchannel SCSI cards. Seriously check eBay, and you will see that the pricing has collapsed with many now selling in the £20-30 range. You’re welcome!

Not really wanting a 3rd SCSI card, but my eye saw this one with the cache RAM, and I figured if I wanted the ultimate PS/2 of course I’d want a caching controller. This looks to be the first rev of the PCB, but with the ‘hot fixes’ in place from the second rev. While the ROMs are stepping back to 1990, I don’t care much about the 1GB disk limit, as the BlueSCSI can emulate all the available devices in the chain, so I’m not losing anything in the way of capacity. This is a 286 after all.

Since the RAM card screws up the setup program, I have to remove it, and the old SCSI controller, re-configure the system with all the RAM and disks removed first. Then put in the new controller, and re-run setup.

I just accept the defaults, and reboot to check what happened. So far it looks good, slot 8 being near the middle of the PCB, and closer to the disk cage where the blue SCSI rests.

Remembering that the IBM controllers inventory the disks backwards, the 380MB disk image on SCSI ID 6, is the primary boot disk. I didn’t set it to the full 1GB as I want to later see how older versions of DOS/OS2 work with this, and I know they have issues with disks bigger than 512MB, but I figured matching a disk that did exist in 1988 would be more realistic.

With the SCSI setup, I could put the troublesome Boca board back with the RAM, and get my system booting up with the new “faster” SCSI controller, and all that new RAM.

Of course I did a few benchmarks on the old SCSI controller so I would know how much more awesome the new one is.

As you can see this is booted with my normal config.sys with a himem.sys and smartdrv from Windows 3.1 on a MS-DOS 5.1 install.

2,345.8 KB/sec With himem.sys & smartdrv
2,347.5 KB/sec with no himem.sys
2,316.6 KB/sec with runtime xmsmmgr & smartdrv
2,334.0 KB/sec with Windows 3.1 himem.sys no smartdrv

So, with these scores in hand, you can see that the penalty for various XMS memory access being turned on is there, but it’s nowhere near as massive as I’d have thought for performance. Even with it just being there, although again it’s so minimal.

Now for the real shocker:

That’s right, the advanced card is slower. A good 11% slower. Well, that was disappointing. I’m still keeping it in the machine, as having a hardware caching controller was all the rage, just like Mach microkernels. Maybe it’d make more of a difference in a 32bit system, but it’s performance is very underwhelming. For anyone wondering, the WDC AC2340, is an EIDE 340MB hard disk, with a 64kb cache. Im sure it was considered very fancy, and fast for the era, and it’s nice to know that no matter the SCSI controller, the BlueSCSI blows it out of the water. Also keeping in mind that MFM data transfers are usually sub 400KB/sec, so this is much more faster.

Okay you have all this XMS what are you going to do with it?

Well, after I did manage to get this original copy of Word for Windows 1.0, I thought that it would be a good test. One fun thing is that it includes the ‘runtime’ version of Windows 2.11, which can also upgrade an existing install of Windows 2 if detected. Running Windows 2 on MS-DOS 5, does involve loading the setver command in the config.sys, and rebooting. Windows 2 cannot use XMS (more on that) but instead uses the older LIM EMS standard that allows a 64kb page to be viewed from a far larger card. Since the 8086/80286 still use 64kb segments it’s not all that crazy to use.

And that brings me to this great program EMM286!

It allocates a 64kb page in low ROM, and backfills it from XMS. So I give it 3MB, and now I have 1.3MB of XMS left, and 3MB of LIM EMS ready for Windows!

So now I have EMS & XMS! And didn’t have to get some pesky EMS board either. I am pretty sure you need device drivers to use EMS, so how do you use LIM EMS under OS/2 1.x? I have no idea. Probably not I guess?

Anyways I run word, everything is great, it sees extra ram. I exit windows, and unload EMM286, and ..

3.4MB of XMS available? Somehow I lost a megabyte of RAM from Windows 2?! I’m not sure what is going on, or why or how Windows even touched it. Needless to say if you want it back, you need to reboot.

That’s right 494KB free! I thought MS-DOS under OS/2 just used some stubs in real mode, and called back to protected mode. No doubt this is totally wrong, there has to be some weird version of DOS+OS2 that actually runs in real mode going on here. I know that ‘bimodal drivers’ were a thing, but it sure seems like there really is a ‘real mode OS/2’ kernel with MS-DOS tacked onto the side.

Windows 3.0 standard mode, 286 + 5MB of RAM

It’s annoying OS/2 can’t tell you how much ram it sees and what is in use, but at least Windows 3.0 can. It’s more than enough to run Sim City, clearly making this one of the more expensive machines to run the game as intended. With the added RAM it doesn’t thrash as hard, but having emulated disks probably doesn’t matter as much as access time is always zero, and it’ll stream data as fast as it can. You can feel the difference moving between tasks, but things like the OS/2 file manager that loads a view into every directory is still incredibly slow. What were they thinking?!

Thouhts?

Back in the day this would have been an incredibly expensive upgrade. And is it worth it? The machine is still locked at 10Mhz. The FPU is also locked at 10Mhz, and you can feel it. The lightening fast disk access, despite it being some 11% slower is really hard to tell. Does the caching help at all? Applications don’t have to page in/out like crazy before as there is enough RAM to actually run them, but that is where the 10Mhz processor just isn’t there.

Just like the caching SCSI controller, I’m sure we’ve all heard how having that magical EMS memory would help out games like Wing Commander.

XMS/DOS High + EMM286 on the left, and just XMS + DOS High on the right

Well, I had to put them side by side, as I couldn’t believe it, but adding EMS made it noticeably slower. I was *NOT* expecting that. I should add that I used Vegas & this quick tutorial, on how to pan & resize one video to get them side by side. No doubt it’s not perfect but it’s enough to see that once the ship explodes, the performance on the EMS configuration is greatly throttled. It’s moments like this that makes me wonder is this something the caching SCSI card would do better implicitly? Or is it snake oil as well?

3MB is enough to load OS/2, and one application, just as Word v1 or Excel v2/v3 load just fine, but swapping between them is basically unloading one from memory, and loading the other back out to disk. It’s a shame RAM cost so much 1987-1992 as people really could have benefited from it. It’s just utterly bizarre that on such an outrageously expensive system that you even need RAM upgrade cards, it really should have been baked into the main logic board.

A wild PS3 appears!

Posted on September 27, 2023 by neozeed

I’ve been wanting a cheap Big Endian RISC machine, and of course I want to do it on the cheap! From a few tips it seems its possible to re-activate the ‘otheros’ feature of the PS3, and get the newer ones running Linux!

There is a LOT of warnings about breaking your system, bricking things, so of course I’m not going to buy something nice, and I found this beauty on eBay

Sure it’s beat up, but look at the price!

What a beauty! Only £23 with shipping! The way inflation is going its like McDonalds money.

Anyways a mere 3 days later, and it showed up!

The cover promptly fell off, and I was a bit worried. I hooked up the power, and the red light came but but it didn’t turn on. The power switches are these weird sensors, and it looked like the power one was pushed in. I guess its more of an antenna rather than closing a circuit, so I genitally bent it apart, and it sprang to life. There was no video, but it did chirp pretty loudly so I assumed it was working. I figured there was no disk, so I found the process to reset the video (turn on, holding power and it’ll power off. Power on again, and wait for it to do 2 chirps while holding power down, then let go, and it’ll hopefully lower all video to minimal levels on both composite and HDMI. And yeah, it sprang to life!

The PS3 had version 4.50 loaded, and the first step to bringing back otheros was to update to 4.90. The last version that had otheros was 3.16, so sadly it’s long gone.

Updating was pretty uneventval.

But now starts the real fun.

It’s scratched pretty bad, but you can make out it’s a CECHK03.

, meaning it’s NOR type flash. This matters as the launch devices used NAND, and a heck of a lot more too! And of course totally incompatible. So yeah be careful!

So the first thing to do is to patch the flash. And shockingly this is VERY very easy… It’s so scary it’s easy! Just open the browser after you’ve flashed to 4.90 and go to

https://www.ps3toolset.com/bgtoolset/

Yep it’s a web browser exploit that should terrify you.

Using FLASH buffer overflows we’re going to reprogram the FLASH. WOW could you imagine a world where iPhones ran Adobe Flash?

From the web page, it’s a snap to backup the flash to USB, and then you can download and merge the flash patch right from the UI

With the image loaded and merged, we can now re-flash the PS3.

It’s really this easy.

wow.

Now you need to power it off.

Next up is to install the Evilnat CEX 4.90 hacked firmware. It’s pretty simple, much like the production image, it installs from the XMB after copying the file to USB in the appropriate directories. I downloaded “CFW 4.90 Evilnat Cobra 8.4 [CEX].rar“.

And now you are a reboot away into modified OS

There was a bunch of users, and installed games, I removed the users, deleted the games, and formatted the disk. I’m not going to be playing games anyways.

Now it was a bit more things to do.

Partition the flash, and re-program it again with the otheros support. And then now finally you can boot to the BusyBox ramdisk.

I’ll have to touch on this part a bit more, it’s involved, and again you can brick your PS3. If you worry about it, now is the time to do it, as many are being sold effectively as garbage.

For the heck of it, I exploded out an old Red Ribbon ISO, and was able to ‘live image’ boot it from USB.

So this gets me part of the way here.

The next thing to figure out is if I can downgrade the OS to something where I can partition part of the hard drive for Linux. And how to get that installed.

So I’m going to have to leave it here, at least for my usage case I may have to just be happy using the slow USB for the root filesystem. I’m pretty sure when it comes to partitioning the disk you need the lower OS version to do so. Obviously for me I can leave it there if it runs, as I don’t care about playing games on this one anyways.

Which I’m sure won’t be as bad once I turn off X11 and everything ‘nice’ for a user.

Also you probably want to get a PS3 controller, as at any point you need to do a recovery you need to be able to hit the ps3 button. And that’s where I am currently stuck, but not bricked.

Installing the IBM SCSI / A ‘tribble’ card in an IBM PS/2 model 60, using BlueSCSI, and a tale of painful lessons.

Posted on September 17, 2023 by neozeed

As a follow up to Installing a Gotek floppy emulator, this time I’m adding something desperately needed, mass storage using a SCSI card.

The machine is the 40Mb MFM based model, the cheapest option of getting a PS/2 model 60 back in the day. MFM hard disks are incredibly old, and sadly the eventual end point for these old disks is death. While I had investigated a MFM disk emulator they are very costly, with prices starting at $299 USD. Ouch. However, from my Dec Alpha experiments I do have the BlueSCSI was available for a more reasonable £52. So all I would need was a SCSI adapter, and I’d be good to go, right? Mostly.

Looking at the card, you can see that it doesn’t use a standard 50 pin connector. I guess it being the 1980s and IBM trying to re-capture the PC market by going all in with proprietary connectors, they used a 50 pin IDC connector to attach the 50pin SCSI ribbon cable. This would prove to be disastrous for me later on. I initially had no luck finding an original cable, while the SCSI cards themselves seem to be plentiful on eBay. I guess me buying 2 of them has triggered a lot of movement in the market. Another source of concern is that the 286 is 16bit, and the card is advertised as being 32bit, but rest assured the notched middle part seems to indicate that the card is 32bit/16bit compatible. I can attest it works in my PS/2 just fine.

I had decided that since I do have a bunch of jumper cables, I could just solder them directly to the card fingers. I only have one device, so I don’t really need a ribbon cable, the BlueSCSI can emulate multiple devices, so I figured it’d be fine. Of the 50 pins in a SCSI ribbon more than half are ground, so I figured I only needed to solder up about 25 connections, just like how Apple got away with 25 pin connections. I did tone out the pins looking for the +5v power signal, along with checking the common ground, where the flip side of the SCSI card is all ground.

I had connected it up, and the machine saw the blue SCSI, but for some reason it was always reading 25Mb.

I was unable to figure out what was going on, so when I went to inspect my setup, I had seen one of the cables had disconnected. Uh-Oh.

As I pulled the card out of the computer, 3 more cables had popped off, revealing that the fingers were nowhere near as strong as I had thought, and the fingers had been torn off the card. Very sad. The card still ‘works’ but it’d need someone with a good eye and soldering skills to re-attach the pads, or just solder bodge wires from the test points on the card to the IDC connector.

Obviously if I’d known the fingers were so fragile, I’d have not done this. But I was impatient for the IDC connector to arrive (it took about a month), and I really thought I could get away with it. So I don’t know if it matters for anyone else, but yeah it turns out these fingers are nowhere near as strong to side to side forcers as I had thought. Also I was told “on the internet, so you know it’s true”‘ that various super glues are conductive, so test before you think about trying to do it live.

**IBM SCSI Adapter FRU 15F6561 IBM MICROCHANNEL SCSI 32 bit MCA Card + Cable**

And that is when this pair showed up, another SCSI card, but this time with the illusive cable. There is something weird how the universe times things.

So got this card & cable set (If it was available 3 weeks ago, obviously I would have ordered this one as it has the ribbon!).

Not knowing much about the IBM PS/2 SCSI/A adapter, I went ahead in BlueSCSI, and setup a 380MB disk on SCSI ID 0, a 1GB disk on ID1, and a 2GB disk on ID2. That’s when I found out that the adapter initialises the bus backwards.

I had thought it was a weird thing in the setup utility, so I booted up MS-DOS and ran FDISK to reveal that it really does read the ID’s backwards.

Obviously with the BlueSCSI they are just files on a SD card, so it’s trivial to just rename them.

I had also thought it was weird that the reference disk reads the disks being 2GB just fine, so I double up with both data disks being 2GB.

And sure enough, MS-DOS only sees 1GB per bigger disk. After search for a bit, it turns out that the 1GB limitation is a known thing and newer ROMs can work around the issue. Eagle eye’d might have noticed the first adapter had ROMs from 1990, while the second card has ROMs from 1991. But the better ROMs come from a totally different card. Normally I might have been annoyed, but since my disks are virtual I can just give myself 5x1GB data disks, along with that 360MB OS disk.

This is the best part of virtual peripherals, is that you can load out what would have been super expensive, and impractical for being era correct. Instead, now it’s super easy, barely an inconvenience. I can’t imagine trying to use physical disks in 2023.

One of the reasons I kept the smaller ‘C’ drive was to make for installing OSs a bit easier, as many older things hate ‘large’ disks. But being able to connect so many gives so much flexibility.

It’s a shame the MFM hard disk emulators are a bit expensive, even with my screwup it was still cheaper to go with SCSI, and the BlueSCSI basically just works, the only weird behaviour is all on the ‘tribble’ SCSI / A adapter.

Installing a Gotek floppy emulator in an IBM PS/2 model 60

Posted on September 5, 2023 by neozeed

Well like everything else, once you know what to do, its pretty self explanatory and easy. But until that point it’s a lot of trail and error.

The PS/2 model of computers went away from the PC/XT/AT design for something that would be more toolless and allow for more automation in the building & assembling of these machines. That means they removed loose wiring where possible to give not only great airflow, but an overall clean aesthetic to the PS/2 build. What this also means is that the old 34pin floppy ribbon will not do.

The PS/2 version uses and edge connection and integrates the 5v/12v power rails into the interface. You can try to add an old floppy to the mix, but there is 5 pins that need to be held high through a resistor pack to get an old floppy drive working. I didn’t want to fight it that much so instead I ordered an adapter from eBay, being sold by markgm.

Yes I don’t know what is up with the shipping either.

After much trial and error I found

After a lot of trial and error I found jumpering it for S0 was what worked. While I had read that JC was also needed, it just didn’t work when I tried. S0 puts the gotek into the first floppy position, in the older PC/XT/AT’s they jumper every drive as S1, but have a twist in the cable to negate it on the primary position.

The other catch is that it absolutely required a FF.cfg file

interface = ibmpc-hdout
host=pc-dos

Even though so many other systems didn’t need it, mine sure did. And Obviously I flashed my drive to the latest version of flashfloppy (3.41 as of now.). That also meant checking the processor type, which, is simple enough to check by opening it up, and setting your camera to maximum zoom.

Or checking the gallery of microcontrollers in the various Gotek’s. The prices have shot up dramatically over the last few years for unknown reasons, so they switched to from the ST to the AT line or similar processors.

Can’t say I blame them.

So with the drive updated, and config file loaded, along with a disk image, it finally booted up!

And with that in place I was able to boot the reference disk, and setup the system. The inside is a bit ugly but, I wanted to get this thing fully loaded, so I picked up an 80287-10.

One interesting thing about the PS/2 line of machines is that the 286’s could run their math coprocessors in synch. The IBM-5170/AT ran it asynchronously at 2/3rds the clock value. I would have imagined they convinced someone somewhere how at big step up from a 6Mhz 80286 & 4mhz 80287 to get into a PS/2 model 50/60 with a blistering 10Mhz 80286/287.

Happily the 80287-10 I had gotten from fractal2015, worked just fine.

Wow. awesome.

I’m waiting still for some cables to hook up the bluepill to the SCSI card, and the memory card, so I can run meaningful applications like SimCity for Windows, and OS/2.

PS/2 60 playing battletech, from a gotek emulated floppy

In the meantime I can do simple stuff from floppy. I’m still trying to keep an eye out for either an ethernet card, or a Token Ring card & MAU, along with cisco cards to at least let me use NetBEUI.

But for anyone else needing a solid answer on how to get the Gotek working with an IBM PS/2 model 60, here you go!

Today is Starfield day!

Posted on September 1, 2023 by neozeed

And there is a map of all the locales and when the launch. I was busy working and didn’t notice that Hong Kong had already launched.

Thankfully I did get a payment voucher which fully covered the super fancy edition. Sadly there was no option for GPU’s so I’m going to try this with an OG 6GB GTX Titan.

It was a bit weird to figure out if I could run the game or not but I did get a pop up that today was the day so I guess so.

I’ll have no choice but to update as it goes, so nothing yet to report.

I’m just hoping it’s not the hollow world experience of Fallout 76.

After all that downloading, turns out it doesn’t like my video card at all.

So yeah GTX 1070ti minimum. wow.

So I abused a work machine that ironically has a decent mobile GPU. swapped some storage and booted into the game, played a few hours.. And yeah

When |I could, I took a detour to Earth’s moon, and went out for a walk. Naturally there was a base less then half a click away, and naturally it had 30 insurgents automatically hostile. What a vast but populated world. And then the NPC following me around suddenly took off her space suit, and broke the whole thing. I wanted to maybe get an ARC but apparente it doesn’t run at all on ARC. Seems kinda fishy to me tho. NVIDIA released a new driver like today for the special launch. I don’t know if there will be any fallout.

Surprise Firmware update & BitLocker

Posted on August 31, 2023 by neozeed

So, I rebooted my Windows laptop after some update, and was greeted by this surprise!

I guess lucky for me I had the machine tied to a Microsoft account which in turn had the key backed up. After some tedious typing later and I was back in business.

I guess this was the culprit?

BitLocker was so transparently well working I didn’t even know it was even running. Got to give it that much credit. And if anything, probably should just give up and run it everywhere.

Another Canadian from the great white north fights a vintage Macintosh

Posted on August 31, 2023 by neozeed

Saved from the fishbowl

I thought I’d give a fellow Canadian a shout out, across the interwebz.

Slacktivisim + IA

Posted on August 24, 2023 by neozeed

Can You Chip In?

I guess not surprising, Internet Archive is under fire yet again, and needs help. Again.

For more than two and a half decades, we have collected, preserved, and shared our digital cultural artifacts. Thanks to the generosity of our patrons, the Internet Archive has grown from a small preservation project into a vast library that serves millions of people each year. Our work has impacted the lives of so many of our users who value free and open access to information.

From the beginning, it was important for the Internet Archive to be a nonprofit, because it was working for the people. Its motives had to be transparent; it had to last a long time. That’s why we don’t charge for access, sell user data, or run ads, even while we offer free resources to citizens everywhere. We rely on the generosity of individuals like you to pay for servers, staff, and preservation projects.

If you can’t imagine a future without the Internet Archive, please consider supporting our work. We promise to put your donation to good use as we continue to store over 99 petabytes of data, including 625 billion webpages, 38 million books and texts, and 14 million audio recordings.

If you find our site useful, please chip in! Your support will help us build the web we deserve.

Thank you for joining me.

Brewster Kahle
Founder & Digital Librarian

And how can I support them by doing not much? BING!

Turns out that BING / Edge(ium) has this point thing for using it, and a tip jar to get Microsoft to fund IA. Every 1,000 points you tip will be $1 in real life?

Maybe it helps, I don’t know, I’d like to think it does. I figure 10,000 points let’s me feel like I’ve done something.

Yay slacktivisim.

Oh, and follow me on archive.org as neozeede! I try to upload strange and interesting things as I find them. Or remember to find them.

Peter’s Sun3 Zoo (restored)

Posted on August 7, 2023 by neozeed

Sometimes there is a great seemingly timeless resource on the internet, and you pull from it from time to time, make giant compilations, but never really reach out to the creator, or just archive the entire thing.

Then the unspeakable happens and it just up’s and disappears.

I never reached out to Peter Koch, to even thank him for preserving so much, or to apologise for not preserving his site, for some reason it felt like someone else would have done a better job. But then sometimes you find out you were that one person, and you didn’t do it, so you didn’t do it.

I don’t know the story, but it seems Peter did know that it was coming to and end.

May 01 2010 – Ending

Dear friends!

I have to give up my collection.

So if you’re interested in some pieces or know someone who might, please send me an e-mail.
Peter – Sun3 Zoo

So I’ll put in a call for help for the world at wide? Did anyone save anything more comprehensive than what was in archive.org, or what was in the ‘Titor Special‘?

In the meantime, the site has a new owner, and it’s been restored.

Peter’s Sun3 Zoo – sun3zoo.de

If anyone has any stories or anything preserved it’d be appreciated. There was at least a few parties, and party3, with party2 missing.

Thanks.

Building MS-DOS 2.11

Posted on August 6, 2023 by neozeed

I thought I’d slap together some github thing with MS-DOS 2.11 that’s been made buildable thanks to a whole host of other smart people. The default stuff out there expects you to build it under MS-DOS using the long obsoleted ‘append’ utility which can add directories to a search path. Instead I created a bunch of makefiles that take advantage of MS-DOS Player, and let you build from Windows.

dos211: just the MS-DOS 2.11 sources, I re-aranged stuff and made it (slightly) easier to rebuild on Windows. (github.com)

building should be somewhat straightforward, assuming you have the ms-dos player in your path. JUST MAKE SURE YOU UNZIP as TEXT mode. If you are getting a million errors you probably have them in github’s favourite unix mode.

D:\temp\dos211-main\bios>..\tools\make
msdos ..\tools\masm ibmbio.asm ibmbio.obj NUL NUL
The Microsoft MACRO Assembler , Version 1.25
 Copyright (C) Microsoft Corp 1981,82,83


Warning Severe
Errors  Errors
0       0
msdos ..\tools\masm sysimes.asm sysimes.obj NUL NUL
The Microsoft MACRO Assembler , Version 1.25
 Copyright (C) Microsoft Corp 1981,82,83


Warning Severe
Errors  Errors
0       0
msdos ..\tools\masm sysinit.asm sysinit.obj NUL NUL
The Microsoft MACRO Assembler , Version 1.25
 Copyright (C) Microsoft Corp 1981,82,83

DOSSYM in Pass 2

Warning Severe
Errors  Errors
0       0
msdos ..\tools\LINK IBMBIO+SYSINIT+SYSIMES;

   Microsoft Object Linker V2.00
(C) Copyright 1982 by Microsoft Inc.

Warning: No STACK segment

There was 1 error detected.
msdos ..\tools\exe2bin.exe IBMBIO IBMBIO.COM < 70.TXT
Fix-ups needed - base segment (hex): 70
del -f ibmbio.obj    sysimes.obj   sysinit.obj ibmbio.exe

D:\temp\dos211-main\bios>

As an example building the bios by running make. For the impatiend you can download dos211.zip, which includes a bootable 360kb disk image, and a 32Mb vmdk!

Virtually Fun

Fun with Virtualization

Author Archives: neozeed