6502/COMMON
1
0
Fork 0
mirror of https://github.com/Russell-S-Harper/COMMON.git synced 2024-05-31 22:41:30 +00:00
Code Issues Projects Releases Wiki Activity

Replacing DEC and HEX with NEG and INV.

Browse Source
This commit is contained in:
Russell-S-Harper 2018-09-01 10:40:57 -04:00
parent 800c51a6e1
commit 794550eee5
4 changed files with 26 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
common/common.asm
View File

@ -241,7 +241,15 @@ _DCR .( ; DCR r 6r Rr <- Rr - 1.0 - decrement register
BNE _ADDI0X
.)
_TST .( ; TST r 7r F <- Rr <=> 0.0 - test register
_NEG .( ; NEG r 7r Rr <- -Rr - negate register
RTS
.)
_INV .( ; INV r 8r Rr <- 1.0 / Rr - multiplicative inverse of register
RTS
.)
_TST .( ; TST r 9r F <- Rr <=> 0.0 - test register
LDA _F
AND #_MSK_T ; clear TST bits
STA _F
@ -261,14 +269,6 @@ _3 ORA _F
RTS
.)
_DEC .( ; DEC r 8r Rr <- dec(Rr) - convert Rr from hex aabbccdd to decimal ######.###
RTS
.)
_HEX .( ; HEX r 9r Rr <- hex(Rr) - convert Rr from decimal ######.### to hex aabbccdd
RTS
.)
_GETPQ .( ; sets X as p register and Y as q register, advances PC
LDY #0
LDA (_PC),Y ; get source registers
@ -936,8 +936,8 @@ _END_CMN_CD
FN_0X .WORD _ESC-1, _RTN-1, _BRS-1, _BRA-1, _BRE-1, _BRG-1, _BRL-1, _BRZ-1,
.WORD _BRP-1, _BRN-1, _BRO-1, _BRU-1, _CPR-1, _LDI-1, _SVI-1, _CMR-1
FN_XR .WORD _SET-1, _POP-1, _PSH-1, _EXC-1, _INR-1, _DCR-1, _TST-1,
.WORD _DEC-1, _HEX-1, _ADD-1, _SUB-1, _MUL-1, _DIV-1, _MOD-1
FN_XR .WORD _SET-1, _POP-1, _PSH-1, _EXC-1, _INR-1, _DCR-1, _NEG-1,
.WORD _INV-1, _TST-1, _ADD-1, _SUB-1, _MUL-1, _DIV-1, _MOD-1
_END_CMN_DT

21
common/common.h
View File

@ -6,10 +6,11 @@
; to be able to recognize an overflow/underflow situation, rescale the arguments, and repeat the
; calculation.
; Largest value: $3fffffff or +1048575.999(5)
; Smallest value: $c0000000 or -1048576.000(0)
; Largest value for DEC/HEX: $3d08ffff or +999999.999
; Smallest value for DEC/HEX: $c2f70001 or -999999.999
; Largest value: $3fffffff or +1048575.999(5)
; Plus one: $00000400
; Zero: $00000000
; Minus one: $fffffc00
; Smallest value: $c0000000 or -1048576.000(0)
; Instructions
@ -19,9 +20,9 @@
; EXC r 4r Rr <-> RS - exchange Rr with stack
; INR r 5r Rr <- Rr + 1.0 - increment register
; DCR r 6r Rr <- Rr - 1.0 - decrement register
; TST r 7r F <- Rr <=> 0.0 - test register
; DEC r 8r Rr <- dec(Rr) - convert Rr from hex aabbccdd to decimal ######.###
; HEX r 9r Rr <- hex(Rr) - convert Rr from decimal ######.### to hex aabbccdd
; NEG r 7r Rr <- -Rr - negate register
; INV r 8r Rr <- 1.0 / Rr - multiplicative inverse of register
; TST r 9r F <- Rr <=> 0.0 - test register
; ADD r pq ar pq Rr <- Rp + Rq - addition
; SUB r pq br pq Rr <- Rp - Rq - subtraction
; MUL r pq cr pq Rr <- Rp * Rq - multiplication
@ -124,9 +125,9 @@ _POP_C = $30
_EXC_C = $40
_INR_C = $50
_DCR_C = $60
_TST_C = $70
_DEC_C = $80
_HEX_C = $90
_NEG_C = $70
_INV_C = $80
_TST_C = $90
_ADD_C = $a0
_SUB_C = $b0
_MUL_C = $c0

4
common/macros.h
View File

@ -62,9 +62,9 @@
#define EXC(r) .BYTE _EXC_C + r
#define INR(r) .BYTE _INR_C + r
#define DCR(r) .BYTE _DCR_C + r
#define NEG(r) .BYTE _NEG_C + r
#define INV(r) .BYTE _INV_C + r
#define TST(r) .BYTE _TST_C + r
#define DEC(r) .BYTE _DEC_C + r
#define HEX(r) .BYTE _HEX_C + r
#define ADD(r, p, q) .BYTE _ADD_C + r, p * 16 + q
#define SUB(r, p, q) .BYTE _SUB_C + r, p * 16 + q
#define MUL(r, p, q) .BYTE _MUL_C + r, p * 16 + q

5
common/page6.src
View File

@ -14,15 +14,14 @@ HDR(DEMO)
BRK
BGN(FACTORIAL)
SET(R1, $10.4456)
SET(R1, 10.4456)
SET(R2, 1)
HEX(R1)
MOD(R3, R1, R2)
SUB(R1, R1, R3)
_1 TST(R1)
BRZ(_2)
MUL(R2, R2, R1)
DEC(R1)
DCR(R1)
BRA(_1)
_2 EXT(S0)
RTN