deramp5113's latest activity

The main improvement in version 3 over version 2 was faster floating point routines - twice as fast. See Paul Allen’s comments in the “Q...

Here’s a good write up by Martin Eberhard about the load format used on Altair tapes...

Yes, I used that disk as-is to begin with, but it requires special code at 400h-800h and some additional code on the 9E00h page (in...

I was able to use the original system files for FDOS-III found on the ISIS 8” disk to recreate bootable 5.25” disks that can run on an...

If you want, send me your last name by email and I'll be glad to give you credit in the .txt file for 8K BASIC ver 2.0 deramp5113...

That's great! Thanks for finding this for the Altair community. I have posted your .tap file and made some notes for it here (see 8K...

Great write-up Eric!

I recently had Altair BASIC VER 1.0 loading from paper tape on an IMSAI 8080. The binary came from Mike Douglas' DeRamp.com site...

Great find! Most definitely load and save the content of that tape. We can figure out the loader by examining the tape data. Mike D

FDOS was created for and by iCOM for their FD360 disk system (8 inch floppy, IBM 3740 compatible). The FD360 was later repackaged by...

I received the iCOM MicroFloppy controller and have disassembled the EPROM on it. The EPROM entry points called by the EXEC of Per’s...

The rev 1 mod to the rev 0 board was originally an errata page in the rev 0 manual titled, “Modification for internal hardware interrupt...

Rich’s FDOS material is for the 8” FD360 (iCOM) or FD3712 (Pertec). I reached out to Rich to borrow and archive any FDOS disks he had...

Good stuff! As we were surmising, it appears the FDOS files on the 8” disks are the files you need to build an FDOS 5.25” disk. Most...

The PIC firmware files on the DeRamp website are only for “in-computer” update/installation as described in the front panel manual. It...