Casio PV-7
This page was last modified 17:32, 28 June 2019 by Rderooy. Based on work by Gdx and Mars2000you and others.

Contents

Description

The PV-7 is the first MSX computer released by Casio. It has only 8kB RAM and one cartridge slot, does not have a printer port. This MSX1 computer has a chicklet keyboard that is said to be not very good and the keys too small for everyday use.

The joypad keys are arranged in a circle and labeled 'Joypad 1'. Together with the TR1 and TR2 keys on the bottom left of the computer, these are equivalent to a joystick inserted into joystick port 1. Probably, only the games that use the BIOS routines to handle the joysticks are supported by these internal joypad, it includes the BASIC games using the STICK command. (need confirmation about it)

Apart from the 'Joypad 1' keys, the computer also features normal cursor keys aligned above the joypad keys to the left of the Home key.

To play games on tape, you need the FA-32 CMT I/F package as adapter, because the tape connector is not standard.

It's possible to add another 8kB RAM, two cartridge slots and the printer port by combining this computer with the KB-7 expansion unit. The power supply is not internal, the provided AC power adaptor (AD-4810) is required if you don't use the KB-7 unit, which has its own power supply.

This machine was aimed at the Japanese market. Both the computer and the expansion unit were available in black (BK) and red (RD) colors. There is also a special version of this computer, see Sanno SPCmk-II.

Brand Casio
Type PV-7
Year 1984
Region Japan
Original price ¥29,800 computer
¥14,800 expansion unit
¥3,000 data recorder adapter
RAM 8kB (without KB-7) or 16kB (with KB-7) in slot 0
VRAM 16kB
Media MSX cartridges
Video Texas Instruments TMS9118NL
Audio PSG (AY-3-8910)
Chipset none (separate IC's)
Extras Specific button keys TR1 and TR2, Joypad 1 cursors, (with KB-7) third cartridge slot

Pictures

Casio PV-7 BK (black)
Casio PV-7 PCB
Casio PV-7 PCB
Casio PV-7 RD (red)
Casio PV-7 underside
Casio PV-7 RD label
Casio PV-7 left side
Casio PV-7 back
Casio PV-7 right side
Casio PV-7 expansion slot
Casio PV-7 RF channel selector
Casio PV-7 box
Casio PV-7 manuals
Casio PV-7 PSU

Specifications

The Casio PV-7 is a MSX1 with a Z80A from NEC (D780C-1).

The pins Sound IN, SW1, SW2, -12V and +12V of the cartridge connector are not connected. In general, MSXs without a protection switch have pins SW1 and SW2 connected to GND. A few cartridges use SW1 and SW2 as GND. Sound IN is connected on cartridge connector of the expansion unit. Cartridges with sound expansion can not be used directly in the cartridge slot of the central unit.

The power adapter input must be AC 100V, 50/60hz, 14VA. It produces a voltage of 10V and a direct current up to 800mA. The negative polarity is at center.

Slot Map without KB-7

Slot 0 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh 8kB RAM* Cartridge
Slot
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM
Page 0000h~3FFFh

(*) Only 8kB RAM on Page from E000h~FFFFh

Slot Map with KB-7

Slot 0 Slot 1 Slot 2 Slot 3
Page C000h~FFFFh RAM Cartridge
Slot
Cartridge
Slot
Cartridge
Slot
Page 8000h~BFFFh
Page 4000h~7FFFh Main-ROM
Page 0000h~3FFFh

Connections

  • RF output
  • Analog sound output (mono)
  • Composite video output
  • MT/IF connector (requires CMT I/F package FA-32 as adapter to use a standard tape recorder)
  • Centronics compatible Parallel port for a printer (on the left side of the KB-7 expansion)
  • 2 general connectors (Joysticks, Mouse, Paddle controlers, etc)
  • 1 cartridge slot (without KB-7) or 3 cartridge slots (with KB-7)
  • 1 extension slot for KB-7 unit
  • AC power adapter connector

Links