Search found 33 matches

by BigAlUK
Mon 08 Oct, 2018 12:37 pm
Forum: Development
Topic: v14 compatibility & bug list (WIP)
Replies: 70
Views: 7501

Re: v14 compatibility & bug list (WIP)

Yay! Got the trivial Plantronics detection test working under both PCE and PCem (MAME doesn't appear to provide it yet). Thanks John. 3360 ' Detect Plantronics (Causes screen clear due to Mode 6 work) 3370 SCREEN 2 3380 OUT &H3DD,&H30:CLS:DEF SEG=&HB800:POKE 0,&H55:DEF SEG=&HBC00:POKE 0,&HAA 3390 OU...
by BigAlUK
Sat 06 Oct, 2018 11:13 pm
Forum: Development
Topic: v14 compatibility & bug list (WIP)
Replies: 70
Views: 7501

Re: v14 compatibility & bug list (WIP)

I wrote the Plantronics and Wyse emulations for both PCEM and PCE, Somehow I just knew it was going to be you :) Kudos! I'm particularly impressed with the rather beautiful Wyse font, which I think I once envied long ago when visiting a large US customer and peering over a fellow engineer's shoulde...
by BigAlUK
Sat 06 Oct, 2018 12:36 pm
Forum: Development
Topic: v14 compatibility & bug list (WIP)
Replies: 70
Views: 7501

Re: v14 compatibility & bug list (WIP)

I have another question regarding emulation of Plantronics and Wyse adapters. I know I'm on really dodgy ground here because I am comparing emulations rather than real-world hardware, so this is probably a question of "what does the real hardware do?" rather than "is the emulation correct?" Because ...
by BigAlUK
Fri 05 Oct, 2018 11:46 am
Forum: Development
Topic: v14 compatibility & bug list (WIP)
Replies: 70
Views: 7501

Re: v14 compatibility & bug list (WIP)

As I mentioned on another thread - when emulating an IBM 5150 for historic purposes, there doesn't appear to be a way of reducing the BIOS-detected devices and implied adapter count. I can ask for no games devices, serial ports, parallel ports, but the BIOS is still receiving signals saying the devi...
by BigAlUK
Wed 03 Oct, 2018 4:16 pm
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

Discovered today: IBM Notice that demonstrates (largely by its date of 1984), that 5150-X66 and 5159-X76 models that can communicate with IBM mainframes as 3270 terminals were built using revision B motherboards. But more interesting perhaps is that the older Xxx ones were also withdrawn, so these s...
by BigAlUK
Wed 03 Oct, 2018 3:06 am
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

So, all my latest found knowledge makes me realize that my little tester program (I will continue to call it that, because it has to fit in 12K, so it can run from cassette on a 5150-001) needs to be a little less prescriptive about the slots it counts. So what I have done is couple the slot countin...
by BigAlUK
Tue 02 Oct, 2018 4:49 am
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

I just found something today that should "ease any contentions" about emulating early IBM PC memory and slots. If all you were using were only IBM parts, it would be true to say that an original 5150-014 (say) could only have expanded memory up to 256KB (using three ISA slots with one top-range 64K ...
by BigAlUK
Sun 30 Sep, 2018 2:24 pm
Forum: General
Topic: THE MYSTERIOUS 5150 08/16/82 BIOS
Replies: 1
Views: 408

Re: THE MYSTERIOUS 5150 08/16/82 BIOS

Ok - I found the dump on the MinusZeroDegrees site, and the particular ROM he refers to is definitely an XT image - that matching of the date and the identity byte to a listing of a 5150 BIOS was just pure "coincidence". Also, the larger ROM size should've given the game away. I've slightly updated ...
by BigAlUK
Sat 29 Sep, 2018 8:22 am
Forum: General
Topic: Can I remap keys under PCem?
Replies: 3
Views: 367

Re: Can I remap keys under PCem?

I remap all kinds of keys with GlovePIE Thanks - but that kind of remapping looks at first glance to be a sledgehammer approach - I don't want to remap keys for the whole host. If I were to do that, I'd chuck together my own dedicated remapping wrapper to PCE and PCem using Delphi (an interim solut...
by BigAlUK
Sat 29 Sep, 2018 2:23 am
Forum: General
Topic: THE MYSTERIOUS 5150 08/16/82 BIOS
Replies: 1
Views: 408

THE MYSTERIOUS 5150 08/16/82 BIOS

I was quite stunned that I appear to be the only one to notice this, (or at least mention it on the web), but... First read the comment on MinusZeroDegrees about this BIOS. [Update: Turns out this particular part was another red herring - see next posted reply below. But read on, all the same.] Noti...
by BigAlUK
Wed 26 Sep, 2018 8:39 pm
Forum: General
Topic: Can I remap keys under PCem?
Replies: 3
Views: 367

Re: Can I remap keys under PCem?

Ah - it turns out someone had doctored the PDF of the MS-DOS manual I was reading to show function keys assigned to the Edlin key roles. My function keys are working - its just that they aren't related to what whomever doctored the manual was using. Hence complete confusion. I switched from using th...
by BigAlUK
Wed 26 Sep, 2018 7:50 pm
Forum: General
Topic: Can I remap keys under PCem?
Replies: 3
Views: 367

Can I remap keys under PCem?

This is a sidetrack for me on something else I was doing, so I was hoping for just a very quick pointer in the right direction. I was using EDLIN under DOS 1.1 (yeh, I know!) and reading the manual as I went along (because it's been such a long time, man! You wouldn't know if you weren't there, man!...
by BigAlUK
Tue 25 Sep, 2018 10:21 pm
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

Have spent part of today pouring over the historical evidence again (IBM announcements and IBM internal news letters, mainly). Here's the time-line regarding the period of interest: Before all this period, the 5150-013 already existed: 10/19/81 BIOS had already replaced the 04/24/81 BIOS. The 160K d...
by BigAlUK
Tue 25 Sep, 2018 5:29 pm
Forum: General
Topic: Help with Hercules InColor emulation.
Replies: 9
Views: 674

Re: Help with Hercules InColor emulation.

By the way - loving your website, John. I see you had that algorithm written out a lot clearer than my source (I was using the source code from Marcus Johnson as reference, and had not fully appreciated what he was doing there in my haste to simply get basic detection).
by BigAlUK
Tue 25 Sep, 2018 5:02 am
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

Just as an update as to where this is going: It seems that there may have been some confusion, possibly sowed in the MinusZeroDegrees notes about bugs in the 1982 5150 BIOS. It may be me, or it may be the "others" (hows that for paranoia?). Personally, I'm not sure they are bugs - the behaviours obs...
by BigAlUK
Tue 25 Sep, 2018 12:43 am
Forum: General
Topic: Help with Hercules InColor emulation.
Replies: 9
Views: 674

Re: Help with Hercules InColor emulation.

Yep - that worked (ta)
by BigAlUK
Mon 24 Sep, 2018 7:14 pm
Forum: General
Topic: Help with Hercules InColor emulation.
Replies: 9
Views: 674

Re: Help with Hercules InColor emulation.

Ok ta - will try that later :) :) :)
by BigAlUK
Mon 24 Sep, 2018 7:01 pm
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

Ok - I appear to have stumbled onto a problem that I cannot get my head around yet (it was a bit unexpected when things appeared to be going so well). It happened just after I made an attempt to check out the emulation used in MAME, on top of the PCE and PCem ones. What at first I thought was a diff...
by BigAlUK
Mon 24 Sep, 2018 1:44 pm
Forum: General
Topic: Help with Hercules InColor emulation.
Replies: 9
Views: 674

Re: Help with Hercules InColor emulation.

I was right! PCem needs me to keep sampling the port for a bit longer. This also shows a problem with this method of detection: namely if it is not a Hercules, you could be in that loop for a very long time! Just how long is long enough? But now I was also able try PCem's Hercules InColor emulation ...
by BigAlUK
Mon 24 Sep, 2018 1:34 pm
Forum: General
Topic: Help with Hercules InColor emulation.
Replies: 9
Views: 674

Re: Help with Hercules InColor emulation.

I came across an intriguing result whilst experimenting with my 5150 emulation accuracy tester (that's not what it started out as - honest). If I use it on PCE with a Hercules HGC emulation, it correctly identifies that. But if I run it on PCem, it does not. The BIOS doesn't actually know that it is...
by BigAlUK
Mon 24 Sep, 2018 12:41 pm
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

Hmmm - that's interesting. There doesn't appear to be any way to tell PCem not to include emulations of at least 2 game adapters, 2 serial ports and 2 LPT ports no matter what you do to the configuration file! Consequently, any 5150 emulation is "forcing" the use of ISA slots that a real 5150 PC wou...
by BigAlUK
Mon 24 Sep, 2018 7:29 am
Forum: General
Topic: Is drive sound emulation possible?
Replies: 21
Views: 1943

Re: Is drive sound emulation possible?

Yes - hurts, doesn't it.
I've been hit by a deep fried chip too :)
And it's the surprise that hurts the most
Followed by a sudden feeling of deep depression.
by BigAlUK
Sun 23 Sep, 2018 12:28 pm
Forum: General
Topic: 8086 Disk Manager
Replies: 1
Views: 575

Re: 8086 Disk Manager

From the info you have in your post, it sounds like you've created a HDD with a 286 under an appropriate DOS, and are now trying to use that in emulating what amounts to a much older machine. However, 2 GigaByte HDDs were unheard of when PCs still used 8088/8086 chips. If you are emulating a 5150-cl...
by BigAlUK
Sun 23 Sep, 2018 10:43 am
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

Here's an early example of the program's output. (Let me know if the link doesn't work - never tried this mechanism before now) https://www.onlinestorage.1and1.com/share/04taiekey8 This particular example (Sample.JPG) demos some of the features (which are not yet complete). It was actually taken wit...
by BigAlUK
Sun 23 Sep, 2018 10:14 am
Forum: General
Topic: Is drive sound emulation possible?
Replies: 21
Views: 1943

Re: Is drive sound emulation possible?

I'm tempted to suggest that you add the sound that a real drive makes when its bearings finally wear out.

Or the sound that old capacitors make when they finally burst and explode.

These sounds may be soon lost to humanity as the real machines we emulate finally bite the dust.

:)
by BigAlUK
Sun 23 Sep, 2018 9:27 am
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

By the way, my little (well, not so, now) BASIC program is nearing completion. I will see if I can post output images, and perhaps even the code if anyone may be interested, once it is finished. It's turning out to be a bit of a CPU-Z for 5150 machines - it deduces the most likely part number, takin...
by BigAlUK
Thu 20 Sep, 2018 1:24 pm
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

Incidentally, what has hampered the research quite a bit is the absolute dearth of information on the web about those very early 5150 PC models. It took me a long time to realize what the three appended part number digits actually represented (it was kind of methodical, almost, but then eventually n...
by BigAlUK
Thu 20 Sep, 2018 1:09 pm
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

Re: IBM 5150 Board Switches

Update: It turns out the mysterious problem occurs when I run my (originally Cassette BASIC) tester program under PC DOS 1.0 BASIC or BASICA. Essentially what is happening is that when I configure the emulated PC to have more than 512KB of RAM, running BASIC or BASICA under DOS results in BASIC imme...
by BigAlUK
Thu 20 Sep, 2018 8:43 am
Forum: General
Topic: IBM 5150 Board Switches
Replies: 11
Views: 901

IBM 5150 Board Switches

I've been doing some research and experimentation with both PCE and PCem regarding the switch banks on the two different 5150 motherboards and the relationship with the requested RAM in the emulator configuration. I am quite impressed that both emulators go as far as to even drive the motherboard sw...
by BigAlUK
Fri 10 Aug, 2018 12:55 pm
Forum: Development
Topic: How can I change color on Hercules Mode
Replies: 7
Views: 1572

Re: How can I change color on Hercules Mode

So did it ever happen?