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| SKIP enhancement? http://www.retrosoftware.co.uk/forum/viewtopic.php?f=17&t=703 |
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| Author: | mga1103 [ Thu Nov 03, 2011 6:01 pm ] |
| Post subject: | SKIP enhancement? |
A useful addition to the SKIP directive would be to have the option of initialising a block of memory to a specific value. The EQU*'s are perfect for bytes/words/etc., but if you need to set aside a larger buffer and initialise it to a specific value, then apart from coding a loop to do it, is there another way? Code: .buffer SKIP &100,0 ; initialise 256-byte buffer to zero ...might be nice (or perhaps a completely new directive?). Watcha think? 
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| Author: | RichTW [ Thu Nov 03, 2011 11:52 pm ] |
| Post subject: | Re: SKIP enhancement? |
If I have a spare moment, I'll add the clear value as an optional second parameter, as you suggest. I guess it's fair enough that 0 is not always the best value (e.g. &FF might be better for unused bits of EPROM code). Otherwise, for the moment, just use a loop - or the following macros! Code: MACRO FILL num, value
IF num>0 FOR n, 1, num EQUB value NEXT ENDIF ENDMACRO MACRO FILLTO address, value num = address-P% IF num<0 ERROR "FILLTO address is a backwards reference" ELSE FILL num, value ENDIF ENDMACRO |
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