rom.vhd

Xilinx Ise 官方源代码盘 第四章

--
@ER--RbBF$osHE50RO42RgRgg1b$MDHHO0R$,Q3MO
R--RDqDRosHER0#sCC#s8PC3-
-
R--#CCDOF0HMCR#0CR8VHHM0MHF3WRRCHRIDCDRP0CMkDND$8RN8DRLF_O	sRFl0
FF-N-RsDOEHR#0=CR#D0CO_lsF

---f-R]8CNCRs:/M#$/#OP/#sO/blNb#Cs/DGHH/MGD/HLo_CMP0HsC/G.s3FlP,E8P3R4(jR.jj4/.n/.R:.d46n:4CRLM0FHRb GR-f
-D

HNLssH$RC;CC
Ck#RCHCC03#8F_Do_HO4c4n3DND;#
kCCRHC#C30D8_FOoH_HNs0NE3D
D;kR#CHCCC38#0_oDFHkO_Mo#HM3C8N;DD
Ck#RsIF	C3oMObN	CNo3DND;D

HNLssP$RHCs0G
.;kR#CP0HsC3G.ObFlFMMC0N#3D
D;
0CMHR0$)_mvLCN#R
H#SMoCCOsHRS5
SHSI8R0E:MRH0CCos=R:R
c;SNSS8I8sHE80RH:RMo0CC:sR=;R(
SSSDNFI8R8s:MRH0CCos=R:R
j;SESSHNoE8R8s:MRH0CCos=R:R;(U
SSS0DNLCRR:s0FlNCLD;S
SSD8V0RR:sIFlF
s8S
2;SsbF0
R5SqSS7R7):MRHR8#0_oDFHPO_CFO0sNR58I8sHE80R4-RRI8FMR0Fj
2;S7SSmRza:kRF00R#8F_Do_HOP0COF5sRI0H8ERR-4FR8IFM0R
j2S;S2
0SN0LsHkR0CQahQR#:R0MsHoS;
Ns00H0LkC3R\s	NM\RR:HCM0o;Cs
RRRR0N0skHL0\CR3lsCF_PCMIF_N\sMRH:RMo0CC
s;CRM8CHM00)$RmLv_N;#C
s
NO0EHCkO0s#CRCODC0m_)vVRFRv)m_#LNC#RH
kS#Lb0$CFRsl0FkRRH##_08DHFoOC_POs0F58IH04E-RI8FMR0Fj
2;-O-SFFlbM0CMRXvzw-n
-bSSFRs05-
-SSSSm:RRR0FkR8#0_oDFH
O;-S-SSjSQRH:RM0R#8F_Do;HO
S--SQSS4RR:H#MR0D8_FOoH;-
-SSSS1:RRRRHM#_08DHFoO-
-S2SS;-
-S8CMRlOFbCFMMS0;
O
SF0M#NRM0ERCG:0R#soHM50jRF6R42=R:R4"j.6dcng(Uq7AB ;w"
V
Sk0MOHRFMs0FlNCLDs8CN5L0ND:CRRlsF0DNLCI;R,,RLRMDCRH:RMo0CCRs2skC0s#MR0MsHo>R=RF"slL0NDCCsN;8"
V
Sk0MOHRFMVOkMP5NDL0F0FHlDMVC_,FRDI8N8s,_VRoEHE8N8s,_VR0LH,LRMHR0#:MRH0CCoss2RCs0kM0R#soHMR
H#SFSOMN#0M00RF:bRR0HMCsoCRR:=L0F0FHlDMVC_RM+RL#H0R4-R;S
SPHNsNCLDRRH,[P,R,bRLF:#RR0HMCsoC;S
SO#FM00NMRb0FOsENRH:RMo0CC:sR=LRMHR0#/RRc-;R4
PSSNNsHLRDCLRkV:0R#soHM5b0FOsENRI8FMR0Fj
2;SoLCHSM
S5HVL0F0FHlDMVC_RD<RF8IN8Vs_RRFs0RFb>HREo8EN8Vs_2ER0CSM
SRS[:j=R;S
SS:PR=;Rj
SSSL#bFRR:=jS;
SFSVsRRHHLMRFF00lMDHCR_V00FRFRbRDbFF
SSSSRHVHRR<DNFI8_8sVsRFR>HRRoEHE8N8sR_V0MEC
SSSSVSHRD8V0H5L0=2RR''4RC0EMS
SSSSSP=R:R+PRR*.*[S;
SSSSCRM8H
V;SSSSCCD#
SSSSVSHRL0NDHC52H5L0=2RR''4RC0EMS
SSSSSP=R:R+PRR*.*[S;
SSSSCRM8H
V;SSSSCRM8H
V;SSSS[=R:R+[RRR4;R-RR-kRMlsLCRRFVL#H0RDOFD0COC
8RSSSSH[V5Rc=R2ER0C-MR-PRCCRs$cCRIRl8kbMRH0NFRRNOEs0NOCSs
SSSS[=R:R
j;SSSSSVLk5FLb#:2R=CREG25P;S
SSLSSbRF#:L=RbRF#+;R4
SSSSRSP:j=R;S
SSMSC8VRH;S
SS8CMRFDFbS;
SCSs0MksRVLk;S
SCCD#
SSSskC0ssMRFNl0LsDCC5N80DNLCL,RFF00lMDHC,_VR0LH,LRMH20#;S
SCRM8H
V;S8CMRMVkOF0HMkRVMNOPD
;
SMOF#M0N0FRL0l0FpCHMRH:RMo0CC:sR=DR5F8IN84s/n42*nS;
O#FM00NMR0LF0dFl.MpHCRR:HCM0oRCs:5=RDNFI8/8sd*.2d
.;SMOF#M0N0HREoHEpM:CRR0HMCsoCRR:=5oEHE8N8sn/42n*4;O
SF0M#NRM0EEHodH.pM:CRR0HMCsoCRR:=5oEHE8N8s./d2.*d;O
SF0M#NRM0EEHoA8FsC:sRR0HMCsoCRR:=EEHopCHMR4+R6
R;SMOF#M0N0sR0HN#00HC_RH:RMo0CC:sR=ER5HAoEFCs8s-+4L0F0FHlpM/C24;nR
$S0b0CRNHLR#sRNsRN$5H5Eo.EdpCHMRL-RFF00lpd.H2MC/+d.4FR8IFM0RRj2FsVRFklF0
R;So#HMRND1amz,mRpz:aRRL0N;#
SHNoMDmR7zNa_kRG,7amz_GNk.RR:#_08DHFoOC_POs0F58IH04E-RI8FMR0Fj
2;LHCoMR
RRVRRFbs_H:bCRsVFRHHRMRRj0IFRHE80-o4RCsMCN
0CS0SN0LsHkR0C\N3sMR	\FsVRCRo#:NRDLRCDH4#R;R
RRRRRR0RN0LsHkR0C\C3slCFP__MFIMNs\VRFRosC#RR:DCNLD#RHR
4;SCRLo
HMSsSRC:o#RbbHCVLk
SSSRsbF0NRlbS5
RSRRSRSSR=QR>mR7zNa_kHG52S,
RSRRSRSSR=mR>mR7zHa52S
SSRSS2S;
R8CMRMoCC0sNCFRVsH_bb
C;
VSH_#4n:VRHRH5Eo.EdpCHMRL>RFF00lpd.H2MCRMoCC0sNCS
SLHCoMS
SH4V_nRL:H5VRL0F0FHlpM=CRR0LF0dFl.MpHCo2RCsMCN
0CSLSS:FRVsHRL0MRHR0jRFHRI8R0E-RR4oCCMsCN0
SSSS0N0skHL0QCRhRQaF)VRm6v RD:RNDLCRRH#VOkMP5NDL0F0FHlpMRC,DNFI8,8sRoEHE8N8sL,RHR0,d;.2
SSSLHCoMS
SSmS)vR 6:mR)vXd.4S
SSSSSb0FsRblNRR5Rq=jR>7Rq7j)52S,
SSSSSSSSq=4R>7Rq74)52S,
SSSSSSSSq=.R>7Rq7.)52S,
SSSSSSSSq=dR>7Rq7d)52S,
SSSSSSSSq=cR>7Rq7c)52S,
SSSSSSSSm=RR>mR1zja52H5L0S2
SSSSSSSS2S;
SMSC8CRoMNCs0LCR;S
SCRM8oCCMsCN0R_HV4;nL
HSSVn_4LH:RVLR5FF00lMpHCRR>L0F0F.ldpCHM2CRoMNCs0SC
S:SLRsVFR0LHRRHMjFR0R8IH0-ERRo4RCsMCN
0CSSSSNs00H0LkChRQQFaRVmR)vR c:NRDLRCDHV#RkPMONLD5FF00lMpHCD,RF8IN8Rs,EEHoNs88,HRL04,Rn
2;SLSSCMoH
SSSSv)m :cRRv)m44nX
SSSSbSSFRs0lRNb5qRRj>R=R7q7)25j,S
SSSSSSqSS4>R=R7q7)254,S
SSSSSSqSS.>R=R7q7)25.,S
SSSSSSqSSd>R=R7q7)25d,S
SSSSSSmSSR>R=Rz1ma25j50LH2S
SSSSSS2SS;S
SS8CMRMoCC0sNC;RL
CSSMo8RCsMCNR0CH4V_n
L;S8CMRMoCC0sNCVRH_#4n;S

HdV_.R#:H5VREEHodH.pM=CRR0LF0dFl.MpHCo2RCsMCN
0CSVSH_O4n:VRHRF5L0l0FpCHMRL=RFF00lpd.H2MCRMoCC0sNCS
SSRL:VRFsLRH0HjMRRR0FI0H8ERR-4CRoMNCs0SC
SHSSV:_4RRHV58N8s8IH0=ERRR42oCCMsCN0
SSSS0SN0LsHkR0CQahQRRFV) mv4RR:DCNLD#RHRMVkODPN50LF0pFlH,MCRIDFNs88,HREo8EN8Rs,L,H0R24n;S
SSCSLo
HMSSSSSv)m :4RRv)m44nX
SSSSSSSb0FsRblNRR5Rq=jR>7Rq7j)52S,
SSSSSSSSSRq4='>Rj
',SSSSSSSSS.SqRR=>',j'
SSSSSSSSqSSd>R=R''j,S
SSSSSSSSSm=RR>mR1zja52H5L0S2
SSSSSSSS2S;
SCSSMo8RCsMCNR0CH4V_;S
SSVSH_R.:H5VRNs88I0H8ERR=.o2RCsMCN
0CSSSSS0N0skHL0QCRhRQaF)VRm.v RD:RNDLCRRH#VOkMP5NDL0F0FHlpMRC,DNFI8,8sRoEHE8N8sL,RHR0,4;n2
SSSSoLCHSM
SSSS) mv.RR:)4mvn
X4SSSSSbSSFRs0lRNb5qRRj>R=R7q7)25j,S
SSSSSSSSSq=4R>7Rq74)52S,
SSSSSSSSSRq.='>Rj
',SSSSSSSSSdSqRR=>',j'
SSSSSSSSmSSR>R=Rz1ma25j50LH2S
SSSSSS2SS;S
SSMSC8CRoMNCs0HCRV;_.
SSSS_HVdH:RVNR58I8sHE80Rd=R2CRoMNCs0SC
SSSSNs00H0LkChRQQFaRVmR)vR d:NRDLRCDHV#RkPMONLD5FF00lMpHCD,RF8IN8Rs,EEHoNs88,HRL04,Rn
2;SSSSLHCoMS
SS)SSmdv R):Rmnv4XS4
SSSSSFSbsl0RN5bRRjRqRR=>q)775,j2
SSSSSSSSqSS4>R=R7q7)254,S
SSSSSSSSSq=.R>7Rq7.)52S,
SSSSSSSSSRqd='>Rj
',SSSSSSSSSRSmRR=>1amz55j2L2H0
SSSSSSS2S;
SCSSMo8RCsMCNR0CHdV_;S
SSVSH_Rc:H5VR5oEHE8N8sF-L0l0FpCHMR4<RnN2RM58RNs88I0H8E=R>R2c2RMoCC0sNCS
SSNSS0H0sLCk0RQQhaVRFRv)m :cRRLDNCHDR#kRVMNOPDF5L0l0FpCHM,FRDI8N8sE,RHNoE8,8sR0LH,nR42S;
SLSSCMoH
SSSSmS)vR c:mR)vX4n4S
SSSSSSsbF0NRlbRR5RRqj=q>R757)j
2,SSSSSSSSS4SqRR=>q)775,42
SSSSSSSSqSS.>R=R7q7)25.,S
SSSSSSSSSq=dR>7Rq7d)52S,
SSSSSSSSSRmR=1>Rm5zajL25H
02SSSSSSSSS
2;SSSSCRM8oCCMsCN0R_HVcS;
SHSSV:_6RRHV585N8HsI8R0E>6=R2MRN8ER5HNoE8R8s-FRL0l0FpCHMRR>=42n2RMoCC0sNCS
SSNSS0H0sLCk0RQQhaVRFRv)m :6RRLDNCHDR#kRVMNOPDF5L0l0FpCHM,FRDI8N8sE,RHNoE8,8sR0LH,.Rd2S;
SLSSCMoH
SSSSmS)vR 6:mR)vXd.4S
SSSSSSsbF0NRlbRR5RRqj=q>R757)j
2,SSSSSSSSS4SqRR=>q)775,42
SSSSSSSSqSS.>R=R7q7)25.,S
SSSSSSSSSq=dR>7Rq7d)52S,
SSSSSSSSSRqc=q>R757)c
2,SSSSSSSSSRSmRR=>1amz55j2L2H0
SSSSSSSS;S2
SSSS8CMRMoCC0sNCVRH_
6;SCSSMo8RCsMCNR0CLS;
S8CMRMoCC0sNCVRH_O4n;S
SH4V_nR8:H5VRL0F0FHlpM>CRR0LF0dFl.MpHCo2RCsMCN
0CSHSSV8_Ns8IH0RE:H5VRNs88I0H8ERR>co2RCsMCN
0CSSSSLV:RFLsRHH0RMRRj0IFRHE80R4-RRMoCC0sNCS
SSHSSV:_cRRHV5H5Eo8EN8Ls-FF00lMDHCRR<4Rn2NRM858N8s8IH0>ER=2Rc2CRoMNCs0SC
SSSSS0N0skHL0QCRhRQaF)VRmcv RD:RNDLCRRH#VOkMP5NDL0F0FHlpMRC,DNFI8,8sRoEHE8N8sL,RHR0,4;n2
SSSSCSLo
HMSSSSSmS)vR c:mR)vX4n4S
SSSSSSFSbsl0RN5bRRRqj=q>R757)j
2,SSSSSSSSSqSS4>R=R7q7)254,S
SSSSSSSSSSRq.=q>R757).
2,SSSSSSSSSqSSd>R=R7q7)25d,S
SSSSSSSSSS=mR>mR1zja52H5L0S2
SSSSSSSSS;S2
SSSSMSC8CRoMNCs0HCRV;_c
SSSS8CMRMoCC0sNC;RL
SSSCRM8oCCMsCN0R_HVNI8sHE80;S
SS_HVNs88I0H8EH:RVNR58I8sHE80RR<=co2RCsMCN
0CSSSSLV:RFLsRHH0RMRRj0IFRHE80R4-RRMoCC0sNCS
SSHSSV:_4RRHV58N8s8IH0=ERRR42oCCMsCN0
SSSSNSS0H0sLCk0RQQhaVRFRv)m :4RRLDNCHDR#kRVMNOPDF5L0l0FpCHM,FRDI8N8sE,RHNoE8,8sR0LH,nR42S;
SSSSLHCoMS
SSSSS) mv4RR:)4mvn
X4SSSSSSSSb0FsRblNRR5Rq=jR>7Rq7j)52S,
SSSSSSSSS4SqRR=>',j'
SSSSSSSSSSSq=.R>jR''S,
SSSSSSSSSdSqRR=>',j'
SSSSSSSSSSSm=RR>mR1zja52H5L0S2
SSSSSSSSS
2;SSSSS8CMRMoCC0sNCVRH_
4;SSSSS_HV.H:RVNR58I8sHE80R.=R2CRoMNCs0SC
SSSSS0N0skHL0QCRhRQaF)VRm.v RD:RNDLCRRH#VOkMP5NDL0F0FHlpMRC,DNFI8,8sRoEHE8N8sL,RHR0,4;n2
SSSSCSLo
HMSSSSSmS)vR .:mR)vX4n4S
SSSSSSFSbsl0RN5bRRjRqRR=>q)775,j2
SSSSSSSSSSSq=4R>7Rq74)52S,
SSSSSSSSS.SqRR=>',j'
SSSSSSSSSSSq=dR>jR''S,
SSSSSSSSSRSmRR=>1amz55j2L2H0
SSSSSSSS2SS;S
SSCSSMo8RCsMCNR0CH.V_;S
SSHSSV:_dRRHV58N8s8IH0=ERRRd2oCCMsCN0
SSSSNSS0H0sLCk0RQQhaVRFRv)m :dRRLDNCHDR#kRVMNOPDF5L0l0FpCHM,FRDI8N8sE,RHNoE8,8sR0LH,nR42S;
SSSSLHCoMS
SSSSS) mvdRR:)4mvn
X4SSSSSSSSb0FsRblNRR5Rq=jR>7Rq7j)52S,
SSSSSSSSS4SqRR=>q)775,42
SSSSSSSSSSSq=.R>7Rq7.)52S,
SSSSSSSSSdSqRR=>',j'
SSSSSSSSSSSm=RR>mR1zja52H5L0S2
SSSSS2SS;S
SSCSSMo8RCsMCNR0CHdV_;S
SSHSSV:_cRRHV5H5Eo8EN8Ls-FF00lMDHCRR<4Rn2NRM858N8s8IH0>ER=2Rc2CRoMNCs0SC
SSSSS0N0skHL0QCRhRQaF)VRmcv RD:RNDLCRRH#VOkMP5NDL0F0FHlpMRC,DNFI8,8sRoEHE8N8sL,RHR0,4;n2
SSSSCSLo
HMSSSSSmS)vR c:mR)vX4n4S
SSSSSSFSbsl0RN5bRRjRqRR=>q)775,j2
SSSSSSSSSSSq=4R>7Rq74)52S,
SSSSSSSSS.SqRR=>q)775,.2
SSSSSSSSSSSq=dR>7Rq7d)52S,
SSSSSSSSSRSmRR=>1amz55j2L2H0
SSSSSSSS
2;SSSSS8CMRMoCC0sNCVRH_
c;SSSSCRM8oCCMsCN0R
L;SCSSMo8RCsMCNR0CHNV_8I8sHE80;S
SCRM8oCCMsCN0R_HV4;n8
MSC8CRoMNCs0HCRV._d#
;
S:L4RsVFRHIRMRR405FREEHodH.pM-CRR0LF0dFl.MpHC.-d2./dRMoCC0sNCS
SLV:RFLsRHH0RMRRj0IFRHE80R4-RRMoCC0sNCS
SS0N0skHL0QCRhRQaF)VRm6v RD:RNDLCRRH#VOkMP5NDI.*d+0LF0dFl.MpHCD,RF8IN8Rs,EEHoNs88,HRL0d,R.
2;S#SSHNoMDHRbb8C_F#k0R#:R0D8_FOoH;S
SLHCoMS
SSv)m :6RRv)md4.X
SSSSFSbsl0RN5bRRjRqRR=>q)775,j2
SSSSSSSSRq4=q>R757)4
2,SSSSSSSSq=.R>7Rq7.)52S,
SSSSSqSSd>R=R7q7)25d,S
SSSSSScSqRR=>q)775,c2
SSSSSSSSRmR=1>Rm5zaIL25H
02SSSSS2SS;S
SCRM8oCCMsCN0R
L;S8CMRMoCC0sNC4RL;S

H4V_nRF:H5VR5oEHEpd.HRMC=ERRHpoEH2MCR8NMRH5Eo.EdpCHMRL>RFF00lpd.H2MC2CRoMNCs0SC
SRL:VRFsLRH0HjMRRR0FI0H8ERR-4CRoMNCs0SC
SHS#oDMNR0Fk_8CMR#:R0D8_FOoH;S
SS0N0skHL0QCRhRQaF)VRmcv RD:RNDLCRRH#VOkMP5NDEEHoA8FsC4s-6E,RHAoEFCs8s6-4,HREo8EN8Rs,L,H0R24n;S
SLHCoMS
SSv)m :cRRv)m44nX
SSSSFSbsl0RN5bRRRqjRR=>q)775,j2
SSSSSSSSRq4=q>R757)4
2,SSSSSSSSq=.R>7Rq7.)52S,
SSSSSqSSd>R=R7q7)25d,S
SSSSSSRSmRR=>1amz5H5Eo.EdpCHM-0LF0dFl.MpHC.-d2./d+542L2H0
SSSSSSS2S;
S8CMRMoCC0sNC;RL
MSC8CRoMNCs0HCRVn_4FS;
H4V_nR#:H5VR5oEHEpd.HRMC<ERRHpoEH2MCR8NMRH5Eo.EdpCHMRL>RFF00lpd.H2MC2CRoMNCs0SC
SRL:VRFsLRH0HjMRRR0FI0H8ERR-4CRoMNCs0SC
SHS#oDMNR0Fk_8CMR#:R0D8_FOoH;S
SS0N0skHL0QCRhRQaF)VRm6v RD:RNDLCRRH#VOkMP5NDEEHoA8FsCds-4E,RHAoEFCs8s4-d,HREo8EN8Rs,L,H0R2d.;S
SLHCoMS
SSv)m :6RRv)md4.X
SSSSFSbsl0RN5bRRjRqRR=>q)775,j2
SSSSSSSSRq4=q>R757)4
2,SSSSSSSSq=.R>7Rq7.)52S,
SSSSSqSSd>R=R7q7)25d,S
SSSSSScSqRR=>q)775,c2
SSSSSSSSRmR=1>Rm5za5oEHEpd.H-MCL0F0F.ldpCHM2./d2H5L0S2
SSSSS;S2
CSSMo8RCsMCNR0CLS;
CRM8oCCMsCN0R_HV4;n#
R
RRVRH_8IH0RE:H5VR0#sH0CN0_<HRRR62oCCMsCN0
RRRRRRRR_HVFjk0:VRHRH5Eo.EdpCHMRL=RFF00lpd.H2MCRMoCC0sNCR
RRRRRRRRRRzpma25jRR<=1amz5;j2
RRRRRRRR8CMRMoCC0sNCVRH_0FkjR;
RRRRRHRRVk_F0R4:H5VREEHodH.pM>CRR0LF0dFl.MpHCo2RCsMCN
0CRRRRRRRRRHRRVN_O#:C4RRHV50LF0pFlHRMC=FRL0l0FdH.pMRC2oCCMsCN0
S--So#HMRND8VHVR#:R0D8_FOoH;R
SRCRLo
HM-R-RRRRRRRRRRRRR8VHVRR<='Rj'IMECR7q7)=R<RhBmea_17m_pt_QBea Bmd)54F+L0l0FpCHM,8RN8HsI820ER-
-RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR#CDC4R''-;
-RSRRRRRV_FsI0H8EV:RFHsRRRHMjFR0R8IH04E-RMoCC0sNC-
-SRRRRRRRRkRlGC0sCRR:vwzXn-
-SbSSFRs0lRNb5-
-SSSSRRRmRR=>pamz55j2H
2,-S-SSRSRQ=jR>mR1zja5225H,-
-SSSSR4RQRR=>1amz5542H
2,-S-SSRSR1=RR>HR8V-V
-SSS2-;
-RRRRRRRRRRRRCRRMo8RCsMCNR0CV_FsI0H8ER;