DL260 for next programming with indirect addressing

[alectek]

Hello,

I have a range of BCD value from V2500 to V2577, and I would like to store as BIN to memory from V2600 to V2677. How can I use a for next loop to finish this work?

don't like to do it one by one:
LD V2500
BIN
OUT V2600

Thanks!

[franji1]

Use Pointers, which are just V addresses that contain a V address.

Let's use V3000 and V3001 as the two pointers, one for SRC, one for DEST.
LDA O2500  // Load Address instruction; yes, that is a leading O for Octal, not 0
OUT V3000
LDA O2600  // ditto
OUT V3001

So LD V3000 loads the value in V3000, but LD P3000 (note the P instead of a V) loads the value of the V address in V3000, so it loads the value of V2500.
Similarly, OUT V3001 will write the current accumulator to V3001, but OUT P3001 will write the accumulator value to the V address in V3001, so it writes to V2600.

You have 64 elements in your "array", so do a FOR/NEXT loop 64 times

Code: [Select]

// intiailize the pointers
LDA O2500  // yes, that is a leading O for Octal, not 0
OUT V3000
LDA O2600  // ditto
OUT V3001

FOR K64
  LD P3000  // use V3000 as a pointer
  BIN  // convert accumulator from BCD to BIN
  OUT P3001  // use V3001 as a pointer
  // increment the pointers
  INCB V3000
  INCB V3001
NEXT

*** EDIT *** use INCB, not INC (need BINARY increment on the pointer, not BCD, doh!)

[alectek]

It works great.

Thank you!