| ??? 03/26/06 00:12 Read: times |
#113094 - RE: But why are you reporting... Responding to: ???'s previous message |
Kai Klaas said:
But why are you reporting about read and write errors, then?? Well, I had to use multiple read/writes for 8255 parts only. Not the RAMS, ROM, 8259 and 8279. While the errors in reading / writing are to/from RAM only. Kai Klaas said:
What about using of additional micros, being used as slaves? And, do you really need the access via parallel data bus, or is a serial link enough? Would simplify your layout. Kai Well, i can use additional micros running on I2C or SPI bus for more IO ports, and i suppose that will also minimize the data bus lines - good for both wire-wrap as well as PCB. I intend to do that in either of 2 cases:- 1) In the next project, if this one is able to work. OR 2) If this one fails to work, then redesign teh boards for such a scheme. Actually, i wanted to do the simple things first, and then delve into I2C or SPI busses in later projects. One-step-at-a-time, as they say. |
