---
title: CDSE Apply 300
categories:
- Computers
types:
- Home Computer
origins:
- Brazil
years:
- '1983'
cpus:
- Z80A
params:
  name: Apply 300
  image: /media/museum/photos/cdse_apply-300_1s.jpg
  company: /companies/cdse
  company_name: CDSE
  specs:
  - label: NAME
    value: Apply 300
  - label: MANUFACTURER
    value: CDSE
  - label: TYPE
    value: Home Computer
  - label: ORIGIN
    value: Brazil
  - label: YEAR
    value: '1983'
  - label: BUILT IN LANGUAGE
    value: BASIC
  - label: KEYBOARD
    value: Calculator type QWERTY keyboard with numeric keypad.100 keys in total.
  - label: CPU
    value: Z80A
  - label: SPEED
    value: 3.24 MHz
  - label: RAM
    value: 32KB or 48 KB depending on models
  - label: ROM
    value: 8 KB
  - label: TEXT MODES
    value: 32 x 24
  - label: GRAPHIC MODES
    value: 64 x 44
  - label: COLORS
    value: 'Yes'
  - label: SOUND
    value: 'Yes'
  - label: I/O PORTS
    value: joysticks, RS-232C, tape recorder, video RF output, composite video output
  tabs:
  - photos
  - adverts
  forum_thread: 1288
  photos:
  - title: APPLY 300
    subtitle: ''
    text: ''
    image: null
  adverts:
  - title: BRAZILIAN ADVERT
    subtitle: ''
    text: Dated august 1983 from Micro Sistemas magazine
    image: null
  oc_id: 1323
  source:
    url: https://web.archive.org/web/20230605022810/http://www.old-computers.com/museum/computer.asp?c=1323
    date: '2023-06-05'
---

Very little is known about this very rare Brazilian computer.

CDSE stands for Centre de Desenvolvimento de Sistemas Eletricos. The Apply 300 is a home computer aimed at computing initiation. As usual with most Brazilian computers, it must be a copy of a more famous computer... but which one ?

The Apply 300 is powered by a Z80A CPU cadenced at 3.24 MHz. There seems to be 32 KB and a 48 KB models. There is a BASIC language bundled in the 8 KB ROM.

Text resolution is 32 x 24, and graphical resolution is only 64 x 44 !

<table> <tr> <td></td> <td>We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.</td> <td></td> </tr> </table>