6502/COMMON
1
0
Fork 0
mirror of https://github.com/Russell-S-Harper/COMMON.git synced 2024-11-21 20:31:02 +00:00
Code Issues Projects Releases Wiki Activity

Revising comments

Browse Source
This commit is contained in:
Russell-S-Harper 2021-02-26 07:15:23 -05:00
parent b1a019a1c4
commit fe780a8328
1 changed files with 14 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
common/common.h
View File

@ -6,15 +6,23 @@
; to be able to recognize an overflow/underflow situation, rescale the arguments, and repeat the
; calculation.
; Largest value: $3fffffff or +1048575.999(5)
; Plus one: $00000400
; Zero: $00000000
; Minus one: $fffffc00
; Smallest value: $c0000000 or -1048576.000(0)
; Largest value: +1048575.999(5) internally $3fffffff
; Smallest value: -1048576.000(0) internally $c0000000
; Plus one: +1 internally $00000400
; Zero: 0 internally $00000000
; Minus one: -1 internally $fffffc00
;
; Literals can be in bases 10, 16, 8, or 2, with $, &, and % as prefixes for bases 16, 8, and 2
; respectively. Some examples, all representing the same value:
;
; DEC: 1000.25
; HEX: $3E8.40
; OCT: &1750.20
; BIN: %1111101000.01
; Instructions
; SET r aabbcc.dd 1r dd cc bb aa Rr <- aabbccdd - set register
; SET r aabbccdd 1r dd cc bb aa Rr <- aabbccdd - set register
; LDD r xxyy 2r yy xx Rr <- (xxyy) - load register directly from address
; SVD r xxyy 3r yy xx (xxyy) <- Rr - save register directly to address
; PSH r 4r RS <- Rr - push onto stack