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Dwight Elvey
August 14th, 2017, 10:18 PM
I was a Anchor E. this morning to get some parts. On the used odd
stuff table was a Rockwell development system in a really nice big blue chassis.
The stuff inside had a CPU board with a 6502 so it should be fun. It
has 32K of RAM in two 16K boards.
The back plane looks like Eruo-Bus ( anyone know if it is? )
It has 2 split busses. Most cards are narrow but one card looks like
a ICE controller with two wide cables.
No dongle for it, though.
The front panel has two zif sockets that I suppose were for programming
EPROMs. I regret there wasn't a card inside for these.
At least one card is for serial and another for parallel printer.
There is one or two other cards that I've not figured out yet.
No floppy drives but I suspect that is what one of the ?? cards are
for.
Less than $25 plus tax.
Dwight

gslick
August 15th, 2017, 06:31 AM
Rockwell had a line of both 64-pin DIN and card edge connector 100mm x 160mm (3.9 x 6.3 inch) cards and backplanes in at least 4, 8, and 16 slot lengths.

ROCKWELL RM 65 MICROCOMPUTER MODULES (https://archive.org/download/RockwellRM65ModulesBrochure/R9_RockwellRM65ModulesBrochure_Mar82.pdf)

I have a small backplane with a 6502 CPU card, an 8K SRAM card, a CRT controller card, and a bus adapter card that can attach to an AIM-65 expansion connector. If you attach the backplane to the AIM-65 and install the CRT controller card you can get the standard AIM-65 BASIC output on the CRT. I don't have an FDC card.

Dwight Elvey
August 15th, 2017, 09:01 AM
Rockwell had a line of both 64-pin DIN and card edge connector 100mm x 160mm (3.9 x 6.3 inch) cards and backplanes in at least 4, 8, and 16 slot lengths.

ROCKWELL RM 65 MICROCOMPUTER MODULES (https://archive.org/download/RockwellRM65ModulesBrochure/R9_RockwellRM65ModulesBrochure_Mar82.pdf)

I have a small backplane with a 6502 CPU card, an 8K SRAM card, a CRT controller card, and a bus adapter card that can attach to an AIM-65 expansion connector. If you attach the backplane to the AIM-65 and install the CRT controller card you can get the standard AIM-65 BASIC output on the CRT. I don't have an FDC card.

I'll have to see if some of those cards match the boards. I looked at the RAM cards again this morning before taking off to work. They are 32K DRAM each.
So, I have 64K of RAM.

Looking at BitSavers 1985 Rockwell data catalog, it looks to be one of their MTDS RDC-1001 systems ( missing video, floppy and keboard ).
I think I have the FDC card. Do you have information on the video card?
Dwight

dave_m
August 15th, 2017, 12:50 PM
Do you have information on the video card?


Dwight,
I think the development system interfaced through a RS-232 terminal. But the Rockwell terminal inclosed the floppy drives. So you will need external floppies.
-Dave

MikeS
August 15th, 2017, 01:36 PM
If you attach the backplane to the AIM-65 and install the CRT controller card you can get the standard AIM-65 BASIC output on the CRT. I don't have an FDC card.
Of course you could also just connect a terminal program to the serial port to have BASIC (and Forth, PL/65 and Pascal) display in full-screen mode and transfer files back & forth...

gslick
August 15th, 2017, 02:38 PM
Of course you could also just connect a terminal program to the serial port to have BASIC (and Forth, PL/65 and Pascal) display in full-screen mode and transfer files back & forth...

That's appropriate and really the only way to use BASIC on a SYM-1. But with the AIM-65 built-in keyboard it's sorta more cool to add just a video display and continue using the built-in keyboard, even if somewhat less practical.

gslick
August 15th, 2017, 02:47 PM
Do you have information on the video card?
Dwight

I have an original RM 65 CRT CONTROLLER MODULE USER'S MANUAL. It covers both the 72-pin Edge Connector version (RM65-5102) and the 64-pin Eurocard version (RM65-5102E). Document number 29801N14, November 1981.

Includes ROM assembler source listing and schematic. Unfortunately scanning it would be destructive to the binding so I am hesitant to do that.

I have the 64-pin Eurocard version of the card.

Dwight Elvey
August 15th, 2017, 02:57 PM
Of course for the SYM-1 I have a KTM-2 keyboard and video out.
Much better than the AIM one liner.
It is too bad I have the older 40 column that can't easily be converted
to 80 column.
I have an FDC-1 as well and it is on my list to put these on a plywood board
and make a working systems with it.
Dwight

MikeS
August 15th, 2017, 04:33 PM
That's appropriate and really the only way to use BASIC on a SYM-1. But with the AIM-65 built-in keyboard it's sorta more cool to add just a video display and continue using the built-in keyboard, even if somewhat less practical.
Well, I prefer the terminal approach, especially for saving & loading; with memory expanded to 40K and the three ROM-based languages instantly available the AIM actually becomes a more-or-less serious computer.

But if you insist on a video display here's what you need:
http://www.classiccmp.org/cini/pdf/Rockwell/r6500n12-CRT.pdf

Rich also has the FDC/DOS manual but I'm not sure if the hardware details and the firmware are available.

m

Dwight Elvey
August 15th, 2017, 06:01 PM
Here is what I have:
2 ea 32K DRAM boards ( they have a funny header with crisscross wires? )

A dual serial board. It leads me to think the original terminal display was a serial in
only as the other part of the connector goes to the board with 2 6522s The other
serial goes to a RS-232.

A floppy controller wit 1793 and firmware FDC 2.0

A CPU card with 6502 and 6522 that goes to some lights and switches??
it also has 2 EPROMs of what looks to be MM68786?I

The ICE board spanning two busses.

An I/O card with 2 6522s

On a search, I'd just seen Rich's page.

Dwight

MikeS
August 15th, 2017, 06:13 PM
On a search, I'd just seen Rich's page.

Dwight

Another AIM65/RM65 resource:
http://www.originalwoodworks.com/aim65/

Dwight Elvey
August 15th, 2017, 06:25 PM
I think they were MCM68766 EPROMs. I need to remove more
of the dried sticky stuff with some goo-gone.
They are a 24 pin 8Kx8. A nice part but hard to find, I suspect.
They are intended to used in place where a 8Kx8 ROM might be used.
The come in various address and select combinations.

On the RAM cards it has a header with a bunch of jumpers, coming from
a 74154. I'm thinking that the RAM is only 32K in one bank at a time.
The 74154 selects different banks addresses. I would guess the other half
is for I/O and ROMs.
Dwight

Dwight Elvey
August 15th, 2017, 09:29 PM
I dumped the EPROMs on the CPU card. They have Forth in them. One is completely
filled while the other has about 3K or so.
That is cool. I prefer Forth to BASIC.
I'd guess the FDC card matches the one i Rich's directory.
Dwight

MikeS
August 16th, 2017, 02:11 AM
I dumped the EPROMs on the CPU card. They have Forth in them. One is completely
filled while the other has about 3K or so.
That is cool. I prefer Forth to BASIC.
I'd guess the FDC card matches the one i Rich's directory.
Dwight
Interesting; the AIM65 version of Forth fits in a single 4KB ROM. Can you post those images somewhere?

Dwight Elvey
August 16th, 2017, 07:10 AM
Do remember, it was intended to run the ICE. My guess is that there
is a lot of application words as well as the Forth core.
It is clearly Forth. Without trying to run it, I'm not sure if it has a
Forth interpreter or is a stripped down application.
Dwight

40320

MikeS
August 16th, 2017, 12:26 PM
Thanks; will have to investigate one day...