Recent content by dieymir

You did much better than my program 😀 and, probably, faster too :ROFLMAO::ROFLMAO: It took 6 min. 56 secs. on the 286 @ 12Mhz and the last estimated value was 3.138400

Here is my homage: * Program to compute PI using Monte Carlo method PROGRAM monte_pi INTEGER niter, i, j, cont, sem DOUBLE PRECISION x, y, pi(100), z, RAND * Initialize random numbers sem = 35791246 CALL SRAND(sem) DO 1,j = 1, 100 niter = niter...

Not so extrange ... there are several accelerators or XT replacement boards (Pepper XT, Breakthrough 286) that used a 286 processor as a fast 8086

It was even more mythical Nobody doubted the existence of Multitasking MS-DOS ... A true unicorn

Wow! This is even better than Multitasking MS-DOS 4

Glad to know you've solved the problem.

Are you sure that Device Type is configured as "16-bit ISA IDE in 8-bit mode" in XUD? Are you sure that IDE interface work on both cards? Maybe your CF card do not support 8-bit mode I've got good results with these Cisco CF cards...

Yes, it works with a CF card (8-bit mode) OR a (micro)SD card with a proper SD2IDE adapter (most of those adapters use a FC1307A chip which is actually a SD2CF chip able to do 8-bit mode) See these pages...

You will find a very good clone (with lot of enhancements) here: http://paulhoule.com/doskey/

The error seems to be related to the infamous A20 line: https://en.m.wikipedia.org/wiki/A20_line To access extended/high (first 64k of extended memory) memory you need to enable it. Unfortunately everyone had his own method to it ... So Either you haven't configured properly the board jumpers...

A really odd duck!! I'm looking for it since ages Do you intend to archive it??

DRI changed names when they changed versions of its mutitasking/multiuser OS: * MP/M was the original name up to version 2.x * Concurrent CP/M and Concurrent DOS (when they added MS-DOS compatibility) were versions 3.x and beyond up to version 6.x (DRI added the XM suffix when Concurrent DOS...

IBM/MS-DOS 3.21 on those that do not have HD floppies and IBM/MS-DOS 3.30 on the rest. This was the last DOS version intended for those machines.

Yes, you can I have a 286@16mhz dual booting PTS-DOS and S/DOS There are several methods but, since I've pts-dos installed, I did this way: save PTS-DOS boot sector to a file, copy S/DOS system files to root dir, hexedit the boot sector replacing PTSBIO.SYS for SBIO.SYS and use LOADSYS...

PCem has a new maintainer Its "spiritual" successor is x86box https://86box.net/ This is the one I recommend