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RPBASIC-52 PROGRAMMING GUIDE

2-63

MTOP

Syntax: MTOP

MTOP = last valid RAM address

Function: Reads or assigns the top of external data memory which will be used by Basic for variable, string,

and RAM program storage

Mode: Command, run

Use: MTOP=30000

PRINT MTOP

Cards: All. Command is limiting on cards with 128K or more of RAM.

DESCRIPTIONS

The MTOP system control value is the maximum external data memory address which RPB ASIC-52 w ill use

for RAM program space and variable and string storage. MTOP is not necessarily the top of available

external data memory. On cards with 32K of RAM, MTOP is automatically set to 7E00H on power up. On

cards with 128K or more of RAM, MTOP is set to 0FFFFH on power up.

ST@, LD@

ERROR

MEMORY ALLOCATION MTOP has been assigned a value greater than top of external data memory.

EXAMPLE

? MTOP

65535

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 162 163

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Remote-processing BASIC 52 Manual de usuario Pagina 82