Cypress Semiconductor CY7C292A Manuel d'utilisateur télécharger pdf (Page 25)

The problem is compounded when a person runs programs in the

“background”. TSR programs like SIDEKICK



and others steal time

during interrupts or key presses. This means you have less time to

be able to receive a character.

A poorly designed TSR program running at the same time may

prevent interrupts from being serviced and you may even miss char-

acters (which is always fatal) when you are “reading” an eprom.

Programming eproms is less critical, since the transmit side of

PGMX is not interrupt driven. This means the error message you

receive about missed characters is only the echo of what was sent

to the 9000. However, if that character was an asterisk (* ), you might

miss the error message that follows. PGMX will eventually “time out”.

Unless you “fix” the problem by reducing the baud rate or running

without the TSR programs installed, it might happen again.

Chapter 4 Diagnostics Model 9000

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Cypress Semiconductor CY7C292A Manuel d'utilisateur Page 25