The MTU pages have been updated.
– New are 8 documents on the MT-130 page, like DISKEX (file exchange with e.g. CP/M), Wordpic, Forth 79, later version of the Full Screen editor.
– The K-1013 Dual density floppy controller has its own page now, with new information
– The MT-130 is emulated on Mame
– MTU K-1000 power unit photos
– the MTU projects by Eduardo Casino
Not yet added are the results of the ongoing discussions on the threads on forum64.de, like multipage K-1008 displays, K-1013 replica builds, CODOS V1 and V2 dissecting.
K-1008, photo by John Lucas
Since 2023, after replicating a working KIM-1 Rev D PCB, Eduardo has been replicating and enhancing MTU products.
See his github pages filled with MTU designs and his blog about his work.
An (incomplete, he adds regularly so check his pages) list of projects:
– KIM-1 Rev D replica (with keyboard and 6530 replacement board)
– MTU K-1008 Visable memory video card, with software
– MTU K-1013 Double Density floppy disk card (with CP/M-65 as operating system and ongoing work on CODOS)
– MTU Expansion card
– MTU Motherboard
– MTU RAM-ROM board
– port of CP/M-65 (David Given) to the KIM-1 with SD card, IEC interface and K-1013
Besides his github and blog pages the MTU projects are discussed on the forum64.de forum:
https://www.forum64.de/index.php?thread/142432-k-1013-floppy-disk-controller-replica/
https://www.forum64.de/index.php?thread/124855-instandsetzung-und-nachbau-eines-kim-1/
https://www.forum64.de/index.php?thread/137493-k-1008-visable-memory-card-replica-wip/
K-1000 Basic KIM-1 power supply, completely enclosed, terminals trip output +5V @ 1.2A, +12V @.01A regulated, +7.5V @.75A, +16V @02A
Used in the early KIM-1 MTU bus system and in the MTU-130/140 systems.
- 16K RAM
- Bootstrap ROM 256 bytes
- Double density controller uPD765
- DMA circuitry to allow direct data transfer
- Up to four 8 inch disk drives
- For MTU/KIM bus system
See also the CODOS page for the Operating systems CODOS V1 (KIM-1 etc) and CODOS V2 (MT-130/140/Accupath 1000)
Differences as found by Eduardo Casino between the MTU-130 Double Density Disk Controller and the original K-1013 Floppy disk controller:
- Add IRQ enable/disable to the control register, implemented with a 74LS175, instead of a 74LS109, to accomodate the extra bit.<.li>
- MTU-130’s 18 bit addressing support.
- Different boot rom contents, specific to the MTU-130.
K-1013 from a MT-130, Eric Wright (Accupath 1000)
Backside of K-1013 floppy disk controller with much rework (Dave Plummer)
Floppy controller from a MT-130, David Williams
Eduardo Casino has made a replica PCB for the K-1013 Rev. D Floppy Disk Controller replica.
This aims to be a faithful replica of the K-1013 Floppy Disk Controller, an extension board for the KIM-1 designed by MTU in the late 70’s/early 80’s for interfacing with Shugart Associates compatible 8” and 5.25” FDDs.
The PCB is build by several users (see the thread at forum64.de) and found to be working fine. The operating system used is CP/M-65 by David Given.
And CODOS V1 is being reversed engineered, based upon CODOS V2.
Replica by Eduardo Casino
Replica by Eduardo Casino
Replica by Eduardo Casino
The MAME emulator can do quite a good simulation of the MTU-130.
What you will need is:
Now start MAME in GUI mode:
and select MT-130 from the available systems
and start CODOS 2.0
Note that some of the disk images are corrupt. CODOS V2 works!
From https://tech.cellfi.sh/
After researching a small lot of Rockwell AIM 65 R6500 Advanced Interactive Microcomputer, there seems to be small variations. Those deserve to be documented. First out, the keyboard variations.
Futaba FK-2054 keyboard found in serial number A43648, A43651, A43653 and A43654.
Stackpole Components 86-90-0030 keyboard found in serial number A31072.
HI-TEK 373-70125 keyboard found in serial number A11220
Futaba FK-2054 key side. Notice the straight line in Q and the plastic keyboard frame.
HI-TEK Part.No. 373-70125 key side. Notice the curly line in Q.
Stackpole Components 86-90-030 key side. Notice the curly line in Q key.
In the MC Magazine 11 1991 a special EMUF is published.
It is based upon the 6502 compatible Mitsubishi M50734 CPU. This CPU is an enhanced 65c02 in a 64 pin housing.
See the datasheet for the enhancements in instruction set.
The EMUF M50734 is a SBC in the tradition of the 65XX EMUFs.
Probably made by Elektronikladen Mikrocomputer Giesler & Danne GmbH & Co. Detmold
Photo by F.J.Kamerewerd, DL6OE
Photo by F.J.Kamerewerd, DL6OE
The EPROM dump below (thanks F.J.Kamerewerd, DL6OE) shows this Copyright string: MONITOR V.1.1 * (C) 1990 J.S.+ O.M.
