Commodore Plus 4 Uživatelský manuál stáhnout pdf (Strana 4)

PLUS 4 PRODUCT SPECIFICATION (Continued)

FEATURES

Built-in extended BASIC 3.5 - over 75 commands. Built-in Machine Language monitor - over 12

commar.ds. Built-in graphics and sound commands. Screen window capability. Reset button (Warm

start). Built-in integrated productivity software.

PERIPHERALS

C1551 Fast Disk drive, C1531 Datasette, MPS 802 Dot matrix printer, MPS 803 Dot matrix printer,

DPS 1101 Daisy wheel printer, C1802 color monitor.

OTHER PERIPHERALS

C1541 Disk drive, MPS 801 Dot matrix printer, C1702 color monitor.

PLUS 4 OVERVIEW

The Plus 4 system is based on the 7501 microprocessor, an HMOS version of the 6510. Video pro-

cessing is achieved by the 7360 TED chip. 64K bytes of dynamic RAM are accomplished by 8 (64K

x 1) I.C.'s. (See page ). The system program is contained in 2 (16K x 8) ROMs. The system supports

up to 128K x 8 of ROM banked in 16K sections. By software control, through the 7360, ROM can

be completely banked out and RAM banked in for a true 64K of RAM (minus 256 byte pages), allow-

ing 60,671 bytes available for BASIC.

Keyboard and joystick scanning are accomplished by outputting the row data on the data bus while

addressing a particular register in the TED chip. This will in turn cause the TED chip to latch the column

information.

A standard serial port supports serial bus peripherals such as the 1541 disk drive and the various

serial printers. A cassette port is provided and the expansion port supports ROM cartrdiges. TTL serial

ASCII is intended to drive an RS-232 adapter.

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Commodore Plus 4 Uživatelský manuál Strana 4