Now with modern FPGAs you van do that: a 40 pin PDIP replacement: the reDIP RIOT is made for that purpose.

Here is the code for the reDIP to make it a 6530-002 or 6530-003:

Github with gateware for Commodore MOS 6530 RRIOT

Since the 6532 is in fact a subset of the 6530 (no ROM, more RAM), it seems not too difficult to make a 6532 replacement this way.

The reDIP RIOT is an open source FPGA board which combines the following in a DIP-40 size package:

Lattice iCE40UP5K FPGA
1Mbit FLASH
5V tolerant I/O
The reDIP RIOT provides an open source hardware platform for 6530 RRIOT / MOS 6532 RIOT replacements.

See here the github for this project

https://github.com/daglem/redip-riot

On this page:

• What is a PAL-2?
• My PAL-2 kit #1
• Schematic
• User manual
• RAM decoding
• Internal and external ROM
• DIP Switches
• Application and Expansion connectors
• Power Supply
• Expansion
• Cassette Audio interface
• Physical Dimensions

My PAL-2 #1 freshly built

Just followed the interactive BOM, passive components first, ICs last.
Nothing special to note, compare yours with the photo on the PAL-2 Tindie site.
Orientation of IC sockets and IC’s, check twice!
Check your soldering joints, not too much sodler, but covered with the right color solder.
And the three slider switches,: the SST keyboard one has a higher slider that the other two!

Please be careful with the Dupont power cables, double check the polarity! If in error: magic smoke!

I do not like the Dupont wires for power, serial, TTY switch. Too easy to make a mistake in the power connection.
I am now designing and building a simple I/O card for the Application connector, experimenters print, point to point wires, male pin connector to PAL-2, on board female connector for USB to Serial, power switch, TTY/Keypad switch.
That may grow later to SD or 1541 or Corsham SD card interfaces.

Video of PAl-2 #4, by Nils, running!

What is a PAL-2?
The PAL-2 is a kit for an SBC in the now large family of KIM-1 clones. Ranging from the Micro-KIM to the PCB exact replica by Eduardo Casino, all share the KIM-1 ROMs, LED display and TTY interface and the 6532 RIOT instead of the 6530 RRIOT.

What makes the PAL-2 unique:

• It is a real and complete KIM-1 clone.
• Available as a DIY kit with high quality components.
• The layout is close to the KIM-1.
• The good looking keypad is very close to the KIM-1
• Application and Expansion connector with all relevant KIM-1 signals.
• Lots of RAM in many configurable options.
• Both RRIOTS 6532 on board.
• TTY interface on TTL level, USB to TTL adapter included in the kit, quality serial!
• Power can come from the USB to TTL adapter or from external 5V supply (same as for the KIM-1)

The PAL-2 differs from a KIM-1

• No Audio cassette interface for file I/O circuit, but see below for a solution
• Application and Expansion connector as 22×2 pinheader instead of PCB edge connectors
• The signals on the Application connector are not all identical: no audio, TTY instead of 20 mA loop, decoding lines added
• Not the same size PCB

The PAL-2 differs from the PAL-1:
The many quality improvements and enhancements make the base PAL-2 kit more expensive then a base PAL-1 kit.
If you expand the PAL-1 to the level of a PAL-2 you need to spend money on a motherboard, a RAM 32K, a second RRIOT kit, an RS232 cable and gender changer and a 9V power supply.

• Improved keypad, with labels and look of the KIM-1
• No need for a Motherboard
  • No external RAM module required
  • No external RRIOT required
• E000-FFFF can be used freely from ROM expansion
• The vectors (Reset, NMI, IRQ) can be placed in external ROM.
• Looks a lot more like a KIM-1
• Complete Application and Expansion connector
• TTY on TTL level instead of (not standard) RS232

Schematic Click for PDF format

PAL-2 User Manual

RAM decoding
The PAL-2 has a very flexible RAM memory layout, as shown in the next parts of the schematics:

Internal ROM and external ROM
The PAL-2 has a 2K ROM with the KIM-1 monitor. Since there is no audio in and out circuitry, the ROM from 1800-1BFF could be used for other programs, like the KIM Clone by Corsham Technology (Which also did not have the audio circuitry). The 28C16 is easy to program.

One of the first expansions that is to be expected is an external 8K ROM. The decoding for this ROM, e.g. an 28C64 is already present on the connectors and in the decoding circuit.
The decoding signals are 8K7_SELECT (CE on 28C64) and 8K7_ROM (OE on 28C64). Just the 28C64 IC has to be connected to address and data lines.

DIP Switches
The PAL-2 has a full 64K address decoder onboard, while the KIM-1 has only a 5K onboard address decoder for expansion. These two DIP switches on the PAL-2 are designed both to expand the KIM-1’s RAM and to maintain compatibility with its basic configuration.
On the PAL-2, the 4-bit DIP switch enables the onboard K1 to K4 RAM spaces, with each bit controlling 1K of memory. The K1 to K4 naming follows the definitions in the KIM-1 user manual, covering the address range from $0400 to $13FF. If all four DIP switches are set to ON, the entire 5K RAM space becomes available to the system.
The 8-bit DIP switch controls the “big segment decoder,” with each bit corresponding to an 8K memory block. These blocks range from 8K0 to 8K7, with 8K0 ($0000 to $1FFF) being the KIM-1’s default occupied address space. Since the PAL-2 is a KIM-1 replica, if you want to use it as a KIM-1 system, 8K0 must be set to OFF to allow the onboard KIM-1 logic to function. However, if you’re building a completely new system on the PAL-2, you can set 8K0 to ON to bypass the KIM-1’s onboard logic for the lowest 8K of memory.
The 8K1 block starts at $2000, controlling an 8K space beyond this address, and so on. If a bit is set to ON, the KIM-1 system will be able to access the corresponding address space, which will function as RAM. If a bit is set to OFF, the KIM-1 system will still work, but with reduced available address space. When performing expansion or add-on modifications on the PAL-2, you may need to disable certain address spaces to prevent the onboard logic from accessing the RAM chip.
The 8K7 block, representing the highest 8K memory segment, offers additional flexibility on the PAL-2. If 8K7 is set to ON, you can choose how to use this space—either as RAM or ROM—by adjusting the 8K7 SEL switch. For example, if you write a program (such as a tiny OS for the KIM-1) and burn it onto a ROM chip—similar to the well-known Jim’s ROM (but smaller)—you can connect the ROM to the PAL-2 (with some additional hardware, which is still under development). To boot from your ROM chip, use the VECTOR SEL switch to select ROM, allowing the system to retrieve the top three vectors from the ROM chip instead of the onboard KIM-1 ROM.

Application and Expansion connectors

KIM-1 Application connector

• AUDIO IN -> 8k7_SELECT
• AUDIO OUT LO -> 8K7-ROM
• TTY in and out now at TTL level for USB to TTL converter
• TTY PTR and KYBD, +1wV, AUDIO OUT LO not connected

This means, even if the edge to pin connector issue is solved, the standard KIM-1 I/O boards will not work for TTY and audio.

The expansion connector is identical to the KIM-1.

KIM-1 Expansion connector

Power supply
Power has to be applied in the standard KIM-1 manner to the application connector Pin 1 = GND, pin A = 5V.
Note that reversing these pins will mean the dead of the PAL-2!

Expansion

As a first suggestion for a PAL-2 extension I see a board connected to Application and Extension connectors with:

• Power switch
• 28C64 (or bigger, switchable in 8K chunks) EEPROM
• Connector for the USB to TTL
• External power connector, switchable between this and USB to TTL connector
• TTY/LED keyboard switch
• connector for the Application I/O ports PA0-PB7
• Power switch

Optional:

• Pin connector for PAL-1 Cassette Interface audio board
• Further expansion with 6522/6850/6551

The excellent expansions by Bob Applegate for the Corsham clone will be a good inspiration, like 6522/6850 I/O board, breadboard board, motherboard.


Cassette Audio interface

The KIM-1 has hardware and software in the 6530-003 ROM to save and dump files on audio tape.
Not used by most KIM clone users, so it is not present on the Corsham KIM Clone and the PAL-2.

But it is possible to have the audio in/out with one patch wire between pin 11 of U12D and the application connector!



KIM-1 Audio and TTY circuit



PAL-2 Audio and TTY circuit

On the KIM-1 circuit you can see the audio I/O is seen by the CPU at pin PB7 of the 6530-003. It is either an input or an output under control of the audio routines in the ROM.
The U26 (also present on the PAL-2 as U12d) is an open collector NAND feding PB7. On one input of U26 is PB5 from the 6530/32 (inverted by U16 (KIM-1_ or U10D (PAL-2), on the other is the output of the audio circuit generating TTL pulses from the audio sound input. This way PB7can be used both as input and output.

The PAL-2 and the KIM-1 has on the extension connector the signal PLL(_TEST), which is connected to U126/U12D. This is on the KIM-1 the output of the audio circuit.
So we have audio in (at TTL level) on the PAL-2 covered!

Audio out is available at PB7 at TTL level. With a patch wire between PB7 (or pin 11 of the U12D) to the application connector.

With the PAL-1 Cassette interface we can have the PAL-2 read and write KIM-1 audio cassette files this way. PLL_TEST to TAPE and a wire from PB7 to PB7 is all you need to connect to the Cassette Interface (and GND and +5V ofcourse).

Leaving R9 out of the Cassette Interface may be a good idea, there is already a pullup in the PAL-2 of 1K.




Physical Dimensions

The connector on the PAL-2 is a 2.54 mm pitch 2×22 female pin header connector.
The dimensions of the PAL-2 PCB are 168 mm x 218 mm.

Next two images show the connector, first shows the distance between the two connectors, while the second shows the distance from the PCB edge to the connector’s outer side.





See also:

Jolt Replica by Eduardo Casino

Eduardo Casino has created a faithful replica of the Jolt single board computer. Tested! Working! The replica design is...

MTU K-1008 Visible Memory

The MTU Visible Memory is a memory mapped video display made by MTU. Supported by the KIM-1 Simulator. See the MTU ...

TTY Serial

TTY Serial The KIM-1 Simulator comes with a 'console', a glass teletype 24x80 screen. It has a subset of ANSI/VT100 sup...

TTY Console

TTY console mode Press the TTY console switch to let the KIM simulator use a glass teletype in a console window. The st...
]]> http://retro.hansotten.nl/6502-sbc/kim-1-manuals-and-software/kim-system-products/kim-5-2/ Sat, 30 Nov 2024 15:26:58 +0000 http://retro.hansotten.nl/?page_id=17388

The KIM-5 ROM board can hold 8 6540 mask programmable ROMs.
Known are the 3x 6540 Resident Assembler/Editor ($200) and 1x 6540 KIMath (50$)

On this page:

• The MOS 6540 ROM
• The KIM-5 ROM board


Where is KIM Going?
Richard Simpson, KIM Forum, Kilobaud 1977

One of the questions most frequently asked me was “what are the future plans for KIM?” Most KIM owners are aware that MOS offers a KIM-2 4K RAM expansion board and a KIM-3 8K RAM expansion board. Either of these can be attached directly to a KIM-1. To expand further, a motherboard (KIM-4) must be added and MOS has planned a KIM-5 ROM expansion board, which will hold up to eight MCS6504 (2K by 8) mask-programmed ROMs (the ROMs are not provided with the KIM-5 but must be purchased separately). At present, there are two sets of software which are planned for release in ROMs – KIMath and a resident assembler/editor.

KIMath
KIMath will occupy a single ROM and consists of a set of subroutines for doing floating-point arithmetic. All calculations are done in BCD to avoid the round-off errors which are inherent in binary floatingpoint routines. The subroutine user can specify the precision (in decimal digits) of any calculation. The more precision specified, of course, the longer the computation time. The package will handle a maximum of sixteen decimal digits of precision plus a two digit exponent so numbers in the range of ±1 times 10E±98 can be handled. The subroutines occupy memory locations F800-FFF8 and were written so they could be used with any 650Xbased system – not just KIM. The subroutines include code for addition, subtraction, multiplication, division, square roots, logs, exponents, tangents and arctangents. All the other trig functions can be generated through the use of trigonometric identities. A subroutine is also provided for evaluating user-specified polynomials, so any continuous function can be approximated.The KIMath ROM should be available by the time you read this. If you don’t want to pay $50 for the ROM, the Programming Manual for KIMath is available for $15 and it includes a complete listing of both source and object code. The manual also contains thirtyseven pages of information on using the subroutines, including a worked-out sample application. If you want to use the ROM but balk at paying $80 for the KIM-5 board to hold it, you’ll be happy to know that the 6540 ROM can be attached directly to the KIM address and data busses, although you’ll need a couple of extra ICs to send the right signal to the KIM-1 Decode Enable line. I’ll provide an interface schematic for this in a future issue of the KIM forum.

The Resident Assembler /Editor
To create any large-scale software on a microcomputer, an assembler is a necessity. Industrial microcomputer users can use the crossassemblers available on several commercial timesharing systems, but the expense of going this route is too much for any but the most affluent hobbyist. Thus, the introduction of the KIM resident assembler should facilitate user software generation and make a lot more software available. The assembler and text editor are available as a set of three MCS6540 ROMs – a total of 6K of code. The $150 which MOS charges for the set may seem exorbitant until you realize that you don’t have to buy 6K of RAM to store it in (which would cost as much or more) and you’ll never have to load it or have it clobbered by errant statements in the program you are developing. Like KIMath, the Assembler/ Editor will work on any 650X-based system. Since the program has to do terminal I/O, locations are reserved in memory page zero to contain the address of the terminal input and output routines. These locations are automatically initialized for KIM owners; users of other 6500 systems (JOLT, TIM, Apple, Baby!, OSI, etc.) can preset those locations with the addresses for the device service routines of their own system. The Editor/Assembler occupies the memory space from E000 to F7FF; thus the editor, assembler, and KIMath fit together in the top 8K of memory.The text editor is a standard line-numbered text editor; it provides much the same editing capability you would find in a BASIC system. You can enter or insert new lines, replace old lines, resequence the line numbers, dump the text file to audio cassette or paper tape, list out lines in the file, and locate lines in the file which contain any specified text string. There is also a special command (actually, any command which begins with an X) to allow you to jump to a user-written subroutine so that you can extend the editor’s capabilities to meet your own needs. Naturally, both the editor and assembler require that you have a terminal connected to the serial port on the KIM-1.The assembler is a singlepass assembler; if your source text is on paper tape or audio cassette, you only have to feed it through once. Normally your source text will be in memory and the assembled code is always written to memory. The source code, symbol table, and object code can be located anywhere in memory you wish. You may have several different source files in memory simultaneously. If you have insufficient memory space to store a large source program, you can break it into several segments, store each segment on audio tape, then bring back one segment at a time for assembly. The assembler will assemble the successive segments until it encounters an “END” statement. It will then put out the symbol table and terminate assembly. Although the editor is fairly limited (it has no capability to edit within a given line, for instance) it is quite sufficient for editing assembly language programs. The assembler is very fast and with good error diagnostics. Perhaps its only serious fault is that the printed symbol table is not sorted alphabetically and no crossreferences are given.


MOS 6540 ROM
The MOS Technology 6540 is a 16k (2KByte) ROM. Factory burned. Mask options for specification of chip select equations. 5! chip selects, requires Phi2 6502 system clock. 24 pin, very uncommon for a small ROM.
A strange and uncommon device, AFAIK only used in the KIM-5 Resident Assembler/Editor and early PET computers. Has a bad reputation, and there are many replacement solutions with standard E(E)PROMs for PET computers.
The 6540’s in the KIM-5 Resident Assembler/Editor on a KIM-5 ROM board are in an excellent condition, dumping with the Backbit Pro chip tester was very easy.

MOS Technology 6540 preliminary datasheet 1977






KIM-5 ROM board
The 3 KIM-5 Resident Assembler/Editor ROMs as placed on the KIM-5 ROM board.
Besides the sockets for the ROMs is some glue logic, 2x 74125 buffers, 2x 7485 address decoders, a 7402 TTL IC and some DIP switches.
The KIM-5 ROM board is to be placed in the KIM-4 Motherboard. The manual is not available alas.


KIM-5 on loan from Stefan Hamann.





Photos of a KIM-5 board with the Resident Assembler/Editor 6540 ROMs in a KIM-4 motherboard. Photos from the TECMUMAS, dem Technikmuseum (Matthias Schmitt)











See also:

Jolt Replica by Eduardo Casino

Eduardo Casino has created a faithful replica of the Jolt single board computer. Tested! Working! The replica design is...

MTU K-1008 Visible Memory

The MTU Visible Memory is a memory mapped video display made by MTU. Supported by the KIM-1 Simulator. See the MTU ...

TTY Serial

TTY Serial The KIM-1 Simulator comes with a 'console', a glass teletype 24x80 screen. It has a subset of ANSI/VT100 sup...

TTY Console

TTY console mode Press the TTY console switch to let the KIM simulator use a glass teletype in a console window. The st...
]]> http://retro.hansotten.nl/6502-sbc/kim-1-manuals-and-software/kim-system-products/kim-3b-2/ Tue, 26 Nov 2024 10:31:55 +0000 http://retro.hansotten.nl/?page_id=17259 KIM-3B, a 16K memory module with 2114 SRAM ICs.

KIM-3B (Stefan Hamann)

KIM-3B (Stefan Hamann)



KIM-3B

	User’s Manual Memory Expansion Module KIM-3B
	User’s Manual Memory Expansion Module KIM-3B

See also:

Jolt Replica by Eduardo Casino

Eduardo Casino has created a faithful replica of the Jolt single board computer. Tested! Working! The replica design is...

MTU K-1008 Visible Memory

The MTU Visible Memory is a memory mapped video display made by MTU. Supported by the KIM-1 Simulator. See the MTU ...

TTY Serial

TTY Serial The KIM-1 Simulator comes with a 'console', a glass teletype 24x80 screen. It has a subset of ANSI/VT100 sup...

TTY Console

TTY console mode Press the TTY console switch to let the KIM simulator use a glass teletype in a console window. The st...
]]> http://retro.hansotten.nl/convert-hex-formats-new-version/ Wed, 10 Nov 2021 18:16:17 +0000 http://retro.hansotten.nl/?p=8501 Bug fix release of the PC utility to convert MOS papertape, Intel hex, Motorola S record, Apple 1 hex etc. Windows and Linux. Source included.

See also:

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...
]]> http://retro.hansotten.nl/convert-to-paptertape-v2-2/ Sun, 07 Mar 2021 12:11:03 +0000 http://retro.hansotten.nl/?p=8113 On the Utilities page I have two programs to convert to MOS Technology papertape format: KIMpaper, a command line utility, and ConvertHexFormat, a GUI app.

All in Freepascal/Lazarus source format, and tested on Linux (Raspberry PI OS) and Windows 10 64 bit. So the programs will run everywhere Lazarus is available (MS DOS, WIndows, Linux Mac OS).

KIMPAPER  is written at the time the Micro-KIM appeared. CLI utility.  Supports Binary to/from Papertape.  Still runs fine on all platforms supported by Freepascal (Windows, MS DOS, Linux etc) after a recompilation, source available.

ConvertHexFormat is a more recent GUI utilitilty with many more 8 bit hex formats as input and output.

There were some bugs of course in older versions. V2 added the ability for multipart hex formats, records having a non-consecutive load address. That seems to wok fine since V2.1
In 2.2 a bug in MOS Papertape format for bigger files is fixed, the end-of-file record (record type 00, total line count) had a bug in the checksum calculation. KIMPAPER is and was correct in the calculation.
But in ConvertHexFormat it was wrong (as it still  is in the well known srec utility in the Unix world!).



See also:

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...
]]> http://retro.hansotten.nl/pc-utilities-updated/ Mon, 01 Mar 2021 09:13:37 +0000 http://retro.hansotten.nl/?p=8097 The PC utilities page has seen an update of th4 Conversion hex formats utility.

Programs to manipulate the binary and hex formatted files of interest for SBC owners. Intel hex, MOS papertape, Motorola S-record, binary, hex conversion fort eh 8 bit world.
Runs on Windows, Linux, Mac due to Lazarus and Freepascal. Source included.



See also:

KIM-1 connectors: beware the Chinese cheap variants!

The KIM-1 needs 2 edge connectors. The specifications are: card edge; PIN: 44; 3.96mm When you search for those, ...

Magazines: Compute! and Compute II

The pages om Magazines had an update. MICRO has its own page with all Best of MICRO pfds. Compute! and Compute II ar...

All documents in the MTU pages are now clean and higher quality, about 50 new PDFs.

I got hold a about 10 cm of MTU documents. Several I already had in PDF format, some not available yet. I took the oppo...

Focal-65 V3D for TIM and KIM-1

Focal on the 6502, a page on this small language, originating for Digital Equipment. A small interpreter (about 5K) for...
]]> http://retro.hansotten.nl/z80/talking-electronics-and-the-z80/talking-electronics-tec-1/my-tec-1d/ Thu, 03 Jan 2019 12:20:54 +0000 http://retro.hansotten.nl/?page_id=3330 I bought a PCB from Ben Grimmett, active on ebay and on the facebook group “Australian Vintage Computer Group”
Parts ordered from China Ali Express and Reichelt Germany. Found very nice 6 mm tactile switches with transparant replaceble caps, so the command letter of the key command can be printed, cutout and inserted.
Also ordered the Writable ROM module Ben designed to replace the 2732 with. Easy to program, test, change system ROMS all from the PC!
This page will document the build.



See also:

PAL-2

4 february 2025 2025 I have built the PAl-2 kit, now designing and building a I/O card. This information is based upon ...

TEC-1 system ROMS

Archive with all ROM images, sources, instructions, articles ## Mon-1 by John Hardy The orginal ROM that shippe...

TEC-1D

The TEC-1C and TEC-1D were designed after the last issue of Talking Electronics was published. So no articles to show he...

TEC-1B

The TEC-1B is an incremental upgrade to the TEC-1A. The SHIFT key is now standard. The 8212 latches are replaced with 7...
]]> http://retro.hansotten.nl/z80/talking-electronics-and-the-z80/talking-electronics-tec-1/tec-1-system-roms/ Thu, 03 Jan 2019 10:33:18 +0000 http://retro.hansotten.nl/?page_id=3318

Archive with all ROM images, sources, instructions, articles

## Mon-1
by John Hardy
The orginal ROM that shipped with the TEC-1 in 1983
Included:
– original BIN binary of ROM
listing in HEX format
listing in disassembled LST format
Reconstructed, labelled and annotated listing in Z80 ASM format
Licensed under the GPL public license v3.0

## Mon-1A
by John Hardy with portions written by Ken Stone
This ROM added a sequencer routine at 0x05b0
Included:
– original BIN binary of ROM
– listing in HEX format
– listing in disassembled LST format
– reconstructed, labelled and annotated listing in Z80 ASM format
Licensed under the GPL public license v3.0

## Mon-1B
by John Hardy with portions written by Ken Stone
A maintenance release which cleans up some junk at 0x07E2 that was added with Mon-1A
Included:
– original BIN binary of ROM
– listing in HEX format
– listing in disassembled LST format
– reconstructed, labelled and annotated listing in Z80 ASM format
Licensed under the GPL public license v3.0

## Mon-2
by Ken Stone
A rewrite of the monitor ROM
Included:
– original BIN binary of ROM
– listing in HEX format
– listing in disassembled LST format
– reconstructed, labelled and annotated listing in Z80 ASM format
Licensed under the GPL public license v3.0

## JMON Monitor
by Jim Robertson
Included:
– original BIN binary of ROM
– listing in HEX format
– listing in disassembled LST format
– Listing in Z80 ASM format
– Fully commented source listing by Jim Roberton (PDF)
Licensed under the MIT license

## Utilities / Disassembler ROM
by Jim Robertson and Mike Donaghy
Included:
– original BIN binary of ROM
– Listing in Z80 ASM format (needs more work)
– Fully commented source listing by Jim Roberton (PDF)
Licensed under the MIT license











See also:

PAL-2

4 february 2025 2025 I have built the PAl-2 kit, now designing and building a I/O card. This information is based upon ...

My TEC-1D

I bought a PCB from Ben Grimmett, active on ebay and on the facebook group "Australian Vintage Computer Group" Parts or...

TEC-1D

The TEC-1C and TEC-1D were designed after the last issue of Talking Electronics was published. So no articles to show he...

TEC-1B

The TEC-1B is an incremental upgrade to the TEC-1A. The SHIFT key is now standard. The 8212 latches are replaced with 7...
]]> http://retro.hansotten.nl/z80/talking-electronics-and-the-z80/talking-electronics-tec-1/tec-1d/ Wed, 02 Jan 2019 15:01:40 +0000 http://retro.hansotten.nl/?page_id=3193 The TEC-1C and TEC-1D were designed after the last issue of Talking Electronics was published. So no articles to show here, only a component list.

The design is identical to the TEC-1B. Only the PCB had some improvements, simple cheap tactical switches are used for example, function names are printed as part of the silkscreen on the PCB.

While the original TEC-1D is still available as a kit from Talking Electronics, a recent production run of the PCB as Reproduction 2018 is available from Ben Grimmett via ebay e.g. The latest is double sided, so no more wires!



Reproduction TEC-1D by Ben Grimmett, note the nice keycaps available on Ali Express.











 



See also:

PROTON Electronics: PC-1, CB80, PIM-1

PROTON Electronics, a small company from Naarden the Netherlands, led by James Post, and A.J. Kool as technical manager,...

PAL-2

4 february 2025 2025 I have built the PAl-2 kit, now designing and building a I/O card. This information is based upon ...

John Bell PN 80-Z80

Z80 Microcomputer PN 80-Z80 PCB images by Gledn Deas, thanks!

PC Tools

Updated December 2020, Linux compilation checked, bugs fixed, online program for comverting binary to wave file. To a...
]]>