Built-in

Philips Semiconductors

Features:

• 6 channel stereo mixers
  
• 6 frequency generators with 8 octaves per generator, 256 tones per octave.
  
• 12 amplitude controllers
  
• 6 noise/freqeuncy mixers
  
• 2 noise generators
  
• 2 envelope generators
  
• 4 bit DAC digital output
  
• Sample rate 15.6 KHz.

Full Data Sheet

More info at http://velesoft.speccy.cz/saa1099-cz.htm

Motorola

COLOR TELEVISION RGB to PAL/NTSC ENCODER
 
The MC1377 will generate a composite video from basebandThe MC1377 will generate a composite video from baseband red, green, blue, and sync inputs. On board features include: a color subcarrier oscillator; voltage controlled 90° phase shifter; two double sideband suppressed carrier (DSBSC) chroma modulators; and RGB input matrices with blanking level clamps. Such features permit system design with few external components and accordingly, system performance comparable to studio equipment with external components common in receiver systems.

• Self–contained or Externally Driven Reference Oscillator
  
• Chroma Axes, Nominally 90° (±5°), are Optionally Trimable
  
• PAL/NTSC Compatible
  
• Internal 8.2 V Regulator

Full Data Sheet

Zilog

The Zilog Z80B, maximum speed 6Mhz.

More on the Z80 Family

Edwin Blink

Edwin Blink

The DALLAS clock was a clock unit that could be read by MasterDOS and B-DOS in place of the SamBus Clock.

See the DALLAS Clock Page for more details, quote as follows:

I wanted to add a realtime clock to my SAM other then the hard to get realtime clock chip used in the sambus and discovered the realtime clock chip from dallas semiconductors which has two big advantages: All clock components inclusive a backup battery are in a single package so implementation is easy, and this clock can be found on PC motherboards which makes it easy to get.

The Dallas clock can operate in INTEL mode and MOTOROLA mode. In order to reduce the chip count I choose to use the MOTOROLA
mode.

My original design of the DALLAS clock was based on integration with the SAM’s Comms interface (In which I already build my EDDAC interface). But to make it function as a stand alone interface a 74LS138 address decoder was added.

Edwin Blink

Edwin Blink

The Disk Protector Unit or DPU for short is a small circuit designed to cure the SAM’s disk corruption problem whenever the SAM is reset or turned on with a disk in the floppy drive.

The problem is caused by the ASICs 8 MHz clock which is halted during reset and then causes the floppydiskcontroller go out of control. Because the floppydiskcontroller needs a constant 8 MHz clock all the time.

All that the DPU does is generate a constant 8MHz clock to replace the ASIC’s 8 MHz clock. The design is simple and easy to build. Only half of the 74LS04 IC is required for the DPU. The other half of the 74LS04 IC can be used to make a NMI debounce switch.

See the DPU Page

Edwin Blink

Hardware modicifation to de-bounce the NMI/Break button.

See the DPU Page for details.

See Hardware Bugs.

MGT

The 64-way ‘EuroConnector’ is a DIN 41612/IEC 60603-2 Type-C Connector and the standard expansion port for peripherals.

The single connector can be extended with a SamBus or a Three-up.

Pin Out:

(NB row A is at the bottom of the Euroconnector, row C at the top).

MGT

Content moved to Keyboard and Joystick port

MGT

Bruce Gordon

The ASIC (Application Specific Integrated Circuit) was the equivelent of the ULA (Uncommited Logic Array) in the ZX Spectrum, a multi-purpose chip to provide functions that would normally require extra hardware and hence extra cost.

The ASIC was also responsible for some Hardware Bugs and limitations.

There also exist 40 prototype Golden ASICs.

MGT

The Coupé could support two 3.5” Ultraslim Citizen Double Density drives each with their own WD-1772-02 disc controller allowing both drives to operate independantly.

Unformatted capacity 1Mb, formatted as double sided, 80 track per side, 10 sectors per track, to the IBM 3740 standard gives 800kB with 780kB usable after directory space subtracted.

Having the drive controller within the drive housing meant that the floppy drive connectors could be used for other devices, most notablty the ATOM IDE interface.

Drive Connectors:

Connections to the two drives are made via two 32-pin Euroconnectors, with rows A and B connected. Drive 1 is on the left of the machine and drive 2 on the right. A list of signals available at these sockets are shown below.

Presumably, three editions of the user’s guide were published. The 3rd edition can be found as a PDF Manual Scan at www.samcoupe-pro-dos.co.uk