Recent content by rfka01

A collection of existing BIOSs "normalized" or standardized to the point where it's easy to compare them would already be a big help - but of course a big labour of love.

Myke, are you saving the downloaded file with a filename in all caps? This could account for the file being there, but MBASIC not being able to load it properly.

Maybe the harddisk option arrived later, but there definitely was a DMV with a 10MB internal harddisk, and an external cabinet with up to two MFM drives ... if you were purely working on MS-DOS, a disk could be formatted to 20MB capacity.

Great, thanks Rodney!

Hi Rodney, can I ask you to share the earlier ROM version for inclusion in the MAME project? Robert

Hi Rodney, attached are the original BIOS and keyboard ROMs for your motherboard. Give me a shout if you need a graphics board for your DMV. All the best Robert

I have a Xerox 820-II 16/8 that came to me non running. The previous owner says he had a working monitor, but it stopped displaying at one point. I have the terminal unit with a flat German keyboard and the attached ROM revision. The Unit powers up its CRT tube and emits a beep that is also...

I've found these a while ago: https://vt100.net/rm/software/images/

I think it's a great idea to keep concepts like CP/M alive - the number of people having worked on machines of that era first hand is in decline. I thought I remembered a similar effort from a while back, but it's modeled after MS-DOS...

On an IBM PC or compatible, unpack the BOOTB utility, format a disk in your drive A: , issue the command "BOOTB A:" This will destroy the original boot sector of this disk. Don't use it on valuable disks. After that, you leave the modified disk in drive A: and put a bootable disk in drive B: and...

@ozzyrules thanks! Robert

Hi @ozzyrules it would be great if you could read (dump) and share your motherboard's BIOS, either by reading it directly in an EPROM reader or using DOS' debug command http://mess.redump.net/dumping/dump_bios_using_debug Robert

Hi Ruud, in an earlier search I had confused Small C with Tiny Basic, so of course the search for Small Basic went nowhere ... With the correct search term, two things came up, both unfinished projects by the look of them: One search result is for a thread here in this Forum, talking about...

Hi everyone, user K-Town Computeum on the German VzEkC forum scanned the manual mentioned in the title, unfortunately his copy is missing pages C-2-1 to C-2-168, this is covering IO.SYS source code. It would be great if there's another copy around and one of the users here could scan the missing...

It would be great to try out the emulation with your disk images and guidance - I'd love to receive your material. Maybe pinching stuff off MAME's serial information for the NCR DMV could help: https://forums.bannister.org/ubbthreads.php?ubb=showflat&Number=97011#Post97011 Robert