Microtan 65 Full-System

This page contains the construction notes, manuals, data sheets, photos etc I have for my Microtan 65 Full-System.

The circuit diagrams have been scanned at a 600dpi resolution so they are around the 700KB size. They may take a while to download or you may not be able to display them in your browser, but you can download them by right-clicking on the link. They still have my scribbles on them and some of the detail may be missing.

  Index
Microtan 65     Video Cards     System Rack
TANEX     TANDOS     Other Projects
TANRAM     ETI Sound Card     Other Data
64K RAM Card     ETI EPROM Programmer
Combo Card     Sinclair Printer

Full (127K)

Microtan 65 (MT0016 Iss 1)

Tangerine's updated CPU card using 6502 Microprocessor.
Users Manual
Construction Notes
Schematic
Circuit Diagram
Photo (NB My version has UHF modulator replaced with connector to 80 Column Monitor. Also D3 moved to a 40/80 column selection switch on front panel.)

TANBUG v2.3 EPROM

TANBUG v2.3 is Tangerine's updated monitor program compatible with the Microtan 65 (MT001 iss 1).
Manual
Manual Appendix inc. Listing
Image

TANBUG v3.1 EPROM

TANBUG v3.1 is Tangerine's updated monitor program that includes Tandos commands.
Image

TUGBUG v1.1 EPROM

TUGBUG is TUG's version of TANBUGv3.1.
Manual/Listing
Image


TANEX (MT002 Iss2)

Tangerine's updated Expansion card. The most noticeable difference is the replacement of the three 74LS367 hex 3-state buffer chips (M2-4) with 2 74LS244 octal 3-state buffer chips (M2-3)
Users Manual
Schematic
Circuit Diagram
Photo
Printer Interface

X Bug EPROM

Manual
Listing
Image F000-F7FF (G2)


TANRAM

Tangerine's bulk memory card which fully expands the Microtan's Address space to 48K. Features 32K dynamic RAM (4116) and 7K Static RAM (2114).
Circuit Diagram
Photo

64K RAM Card

TUG's 64K Dynamic RAM Card
Construction Notes
Schematic
Circuit Diagram
Photo


Combo Card

TUG's Combo Card used for bulk storage of either EPROMs or RAM.
Manual
Circuit Diagram
Circuit Notes
Photo
EPROM Map

BASIC EPROMs

BASIC Manual
Image C000-CFFF (1)
Image D000-DFFF (2)

BASIC E0 + VIDEO80/82 TOOLKIT EPROM

VTK Tool-kit Manual
Image E000-EFFF (3)

BASIC E0 (mod) + BASIC TOOLKIT EPROM

Basic Tool-kit Manual
Original Manual - edited by Jim Rew
Image E000-EFFF(11)

DVWORD EPROMs

DVWORD Manual
Image C000-CFFF (4)
Image D000-DFFF (5)

FIG FORTH EPROMs

ORIC FORTH Manual
Image C000-CFFF (6)
Image D000-DFFF (7)

2 Pass ASSEMBLER EPROMs

Tansoft's 2 Pass Assembler Instructions
Notes
Assembler v1.2 Image COOO-CFFF (8)

DASM ASSEMBLER EPROMs

DASM Manual
Image C000-CFFF (9)
Image D000-DFFF (10)


High Resolution Graphic Card

Tangerine's high resolution graphic Card
Photo

EPROMs

High Resolution Graphic Card Toolkit. Resides in $E800 location
HRG Toolkit Image E000-EFFF


80/82 Video Card

TUG's high resolution Video Card, later adopted by Tangerine giving 40 or 80 column text.
Manual
Construction Notes
Circuit Diagram 1
Circuit Diagram 2
Circuit Notes
Photo

EPROMs

Main firmware for the Video 80/82 Card.
Image
VBug is the operating system for Microtan's 80/82 Video Card. VBug 1.2 is supplied for 40 Column use. VBug 6 (PTL) is supplied for full functionality.
VDUTKT (PTL) Image


TANDOS

Tangerine's Disc controller board that will operate up to 4 drives.
Manual
Construction Notes
TANDOS Disc Anatomy
TANDOS Commands
Schematic
Circuit Diagram
Disk Controller FDC1793 Details
Disk Controller FDC9216 Details
Photo
HxC Floppy Disk Drive Emulator

EPROMs

Command List/Listing
Image

ETI Sound Card

Electronics Today International magazine's Sound Card.
Construction Notes
Circuit Diagram
AY-3-8910 Datasheet
Photo


Bulldog Sound Card

The Bulldog Video Ltd company was formed by ex-main Frame computer designers made redundant by ICL, They were based in Birmingham and designed and marketed products for The hobby and small-business microcomputer owner.

The first product to be released was a pro-grammable sound-generator board for the Tangerine microcomputer. It is Tangerine sized, slots into the system motherboard and has an on- board speaker and audio-amplifier so that sounds can be produced as soon as it has been inserted. Three terminal blocks are provided so that it can be connected up to external systems.

The board is centred on the General Instrument AY- 3-8910; a powerful sound-synthesis chip. The sounds produced consist of a mixture of three channels, each with an independent tone generator and a white-noise generator. The amplitude of the sound can be managed by the envelope-generator; facility. Documentation with the board explained how various sounds can be obtained. Bangs, gunshots, whistling bombs and explosions are there in- be included in games, Music creation is also possible.

The sound board is programmed via a set of 16 registers which can be accessed from Basic, assembler or the Tanbug M instruction set.

Construction Notes
Circuit Diagram
AY-3-8910 Datasheet
Photo


ETI Real Time Clock

Electronics Today International magazine's Real Time Clock.
Construction Notes
Photo


ETI EPROM Programmer

Electronics Today International magazine's EPROM Programmer.
Construction Notes
EPROM Erase Kit
Photo


Sinclair Printer Interface Card

A Nackmain Ltd Tanbus interface card designed to operate a Sinclair thermal paper printer.
Instructions
Driver
Photo


19 inch Rack

I now use a 19 inch rack that was sold by Tangerine specifically for the Microtan. The original Vero Electronics 19 inch rack I had for this system now houses the 6809 system.

Motherboard

This board is fitted in the Microtan 65 full system.

TANBUS Connections
Photo
Photo

Front Panel

This was the original home-made Front Panel for the System rack. It has since been replaced with a Microtan Front Panel.

Connections
Photo

System Power Supply

Home made Power Supply using a PC AT PSU. Details here.
Photo

MPSIIA Power Supply

Tangerine's Power Supply
Data Sheet
Circuit Diagram

Keypad

Home made keypad for the Microtan from a Milking Machine control pad.
Circuit Diagram
Photo



Other Projects

ETI EPROM Programmer 2

Electronics Today International magazine's updated EPROM Programmer.
Construction Notes

ETI EPROM Emulator

Electronics Today International magazine's EPROM Emulator.
Construction Notes

ETI Single Board Computer

Electronics Today International magazine's Single Board Computer.
Construction Notes
Circuit Diagram

ETI 64K Dram

Electronics Today International magazine's 64K Dynamic RAM board.
Construction Notes

ETI Interpreter Project

Electronics Today International magazine's Interpreter Project.
Construction Notes

Serial Keyboard Interface

Construction notes for creating a Serial Keyboard interface to the Microtan 65 supplied by Danny Page.
Circuit Diagram
16F84 PIC Assembly code
Photo 1
Photo 2


Other Data