ID Epson PX-4 & HC-40
Short Name
Name PX-4 & HC-40
Company Epson
Description This computer is the successor of the HX-20.
The main cosmetic difference is a wider screen that can be adjusted to the right angle.
There are 2 ROM slots under the machine to implement additional ROM programs.
On the right of the LCD display can be plugged a tape-recorder, a plotter, RAM expansions, a lot of things or ... nothing.
A lot of peripherals were available for this little computer (see hardware page), at least in japan.
The PX-4 was logically followed by the PX-8.
Date Available 1984
Type Handheld
Emulators
Alternate Names Epson PX-4 & HC-40
Links
Matches tosec Epson PX-4 & HC-40 - Games
oldcomputers 370
tosec Epson PX-4 & HC-40 - Games 
{
    "id": "Epson PX-4 & HC-40 - Games",
    "name": "Epson PX-4 & HC-40 - Games",
    "altNames": [
        "Epson PX-4 & HC-40"
    ]
}
oldcomputers 370 
{
    "type_id": 1,
    "id": 370,
    "pages": {
        "photos": "photos.asp?t=1&c=370&st=1",
        "hardware": "hardware.asp?t=1&c=370&st=1",
        "links": "links.asp?c=370&st=1",
        "docs": "docs.asp?c=370&st=1",
        "comments": "forum.asp?c=370&st=1"
    },
    "image": "https://www.old-computers.com/museum/photos/epson_hx40_1.jpg",
    "company_link": "company.asp?st=1&m=42",
    "company_name": "Epson",
    "company_logo": "https://www.old-computers.com/museum/logos/epson_logo.gif",
    "description": "This computer is the successor of the <a href=\"computer.asp?c=143\">HX-20</a>.\nThe main cosmetic difference is a wider screen that can be adjusted to the right angle.\nThere are 2 ROM slots under the machine to implement additional ROM programs.\nOn the right of the LCD display can be plugged a tape-recorder, a plotter, RAM expansions, a lot of things or ... nothing.\nA lot of peripherals were available for this little computer (see hardware page), at least in japan.\nThe PX-4 was logically followed by the <a href=\"computer.asp?c=198\">PX-8</a>.",
    "name": "PX 4 / HC 40",
    "manufacturer": "Epson",
    "type": "Portable",
    "origin": "Japan",
    "year": "1984",
    "built_in_language": "Basic",
    "keyboard": "Full-stroke keyboard (chicklet keyboard available)",
    "cpu": "uPD 70008 (Z80 compatible )",
    "speed": "3.6864 MHz",
    "co_processor": "CMOS 7508 4bit : handles housekeeping, clock, battery, etc.",
    "ram": "64 KB : 64 Kbit CMOS D-RAM x 8",
    "rom": "96 KB : 256 K-bit CMOS ROM X 3",
    "text_modes": "40 x 8",
    "graphic_modes": "240 x 64",
    "colors": "Monochrom LCD display",
    "sound": "Beeper",
    "size_weight": "A4 size",
    "io_ports": "Serial, RS232c, cassette, cartridge port, printer (parallel) port, expansion port, sound in & out",
    "built_in_media": "Microcasette",
    "os": "CP/M with disk-drives units",
    "power_supply": "Built-in battery which can last for 4 hours",
    "peripherals": "Printers, plotters, tape-recorder, ROM & RAM expansion, barcode reader, EPROM burner, replacement keyboard, modem and more...",
    "price": "1590 FF (France, january 1988)",
    "photos": [
        {
            "name": "Japanese user manual ",
            "image": "https://www.old-computers.com/museum/photos/epson_hc40_manual_p1.jpg",
            "description": "Hello sweety !<p class=\"petitgris\">Thanks to the <a href=\"http://page.freett.com/tata93/hc40.htm\">TATA EPSON HC-40 Page</a> for this picture.</p>"
        }
    ],
    "hardware": [
        {
            "name": "EPROM writer cartridge",
            "image": "https://www.old-computers.com/museum/hardware/Epson_PX8_PromWriterModule_1.jpg",
            "description": "Epson H415A-EA1 Prom Writer Cartridge II. It plugged into the corner expansion port of the PX-4 and had a 32pin ZIF (Zero Insertion Force) socket."
        },
        {
            "name": "Expansion sketch",
            "image": "https://www.old-computers.com/museum/hardware/epson_hc40_expansion-sketch.jpg",
            "description": "There are for sure a lot of peripherals available for the HC-40 ! Wow...\n<br><br>\nThere are printers, plotters, RAM & ROM expansions, disk-drives, EPROM burner, barcode reader, keypad, etc...\n<br><br>\nA larger and better picture is available at the <a href=\"http://page.freett.com/tata93/hc40.htm\">TATA EPSON HC-40 Page</a>.<p class=\"petitgris\">Thanks to the <a href=\"http://page.freett.com/tata93/hc40.htm\">TATA EPSON HC-40 Page</a> for this picture.</p>"
        }
    ],
    "links": [
        {
            "url": "http://www.discordia.org.uk/px4/",
            "name": "Epson PX4 info page",
            "description": "Pinouts and CP/M command reference among other things"
        },
        {
            "url": "http://page.freett.com/tata93/hc40.htm",
            "name": "TATA EPSON HC-40 Page",
            "description": "Great informations here (Japanese) !"
        }
    ]
}