File ROLLDT.PA (PAL assembler source file)

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6/J /TF02 GD+TCA3DOE3OWD2 GTS	K"I&I*1677M	A.-B9*M>J*M>J*M>J3E	D3T" 7ISS7O	R":*M"/*M./&02-?N/V^-*8"I3L;H")*M./FI*)B 7FI+ECD7DSA3ER 3E?C3D;IG*M./B22-?N/V^-*8"I3L;H")*M./FI*)B 7FI+ECD3SGT+RCT+OCF3R3O7LN 7ACM3L;I3G2 3E
N+T;H*M>J*2647AKP.-B92I2(+H	N*M>J*I&12 WR7M[O+ECD7ESN+RCY+OCF3S7A3P	L+NCG3FWR3QWU7N	C*M>J*I&22 C3A
N+ECD7ESN+RCY+OCF3S7A3P	L+NCG3CSO3EZ +OCR7BO2 GS3M3PE7S"J*M"M6J"J*M"M6J2JZI3I3E7DJ 3OSL3T3F/DF%"0*M6IJ*3O3L7P+G"M6J6JSR3DF0*,B "0&I2/?L3C3A2 WT3M?P7RKA7IOE6MJJ/TCDB&,"0*M3RST*03C"I606JSR3DR0.,BI6MJJ/TCDE&,"0*M3RST*03F"I60"J*M/RCT61OM+GB,3Z3B3O/C" &36/SR*0
17MOE3S
A3EF 3RGE6MJJ3T	S+N3D"I&02I&/3N	D7CSA+OCR3SGT7TOU6MJJ7TWF+N3C"I&02IZ/3UON3T?I3NN 3OWD6MJJ3TWD+C3F"I&02IN/7HKA7ASC+ECR7CWO+NCT+ICN7MOE3S
AE*M3RST3B[U6,*I3B?L+CCK"1&42/C3AGR3CWT3RJ 3U[FE7R"J*M"M6J"J*M"M&J7TOAK&=3R3O7LSD"M&J3I	N/W7T. B "M&J7CKU6=JI3OSL3T3FD*M2IWV/R7S"I63"J*M"M6J"J*M"M6J*J*I3R3O3D3TO7C*J>L*M>J*M>J6%SR6ISR*0B17DSA7AR 3E7R3IGN3L> 7PKE3A	TO7N"J6/"J6/*JV/T	W3TWH6 SR*0B17DSA7AR 3E
R3IGN3L& 7NR +HCE7ICN+UCT7D[E3IWC2 ?FR*M2/FI+LCL3OWP7RSA+OCR3I[N3O7R3A	T+O;N2 T3E: 3UWM3ROI2 ;A3DN 7OSN3R3O*M>J2IWK+YCS+OCN3TWH6 SR*0B17PKE7MSI2 T3EV 7NKT3YF +NCD3MSO3I	F7CSA3I;O*M>J2I[O2 T7EJ 3O3L2 GD+TCA3ASN2 WH3A	D+NCG3I[N3O7R3A	T+O;N*M>J*M>J6%
T2IT7EJ /TF02 WK3Y?B3ASR2 GH/SR 6 SS7AWT3S2 3IG+TCS3C;O3T?R3LWLD*M2/ZI3R7O2 T3E6 7ASS6 	S3SWT+MB.3TWH+SCE3SGT7TOU2 	L7GSH3SF +NCD3TWH" *M2/NI7OSN3R3O2 WK+YCS7DSE3E7R3IWN2 W+ACT7TCY3E> 3F& 3N?F3RGM3T?IN*M2/&I3SJ 3E;I3GV 3NWT3RSE2 ;O2 T3E: 3UWM3ROI2 WK+Y;S2
T3ER 3AGT*M>J6IOI2 3C7AOS+ECD+ACS3F3O7L
OS6:"J6/"J6/*JV/T	N3SGT7TOU2I?C7NKTO	L2IGD+TCA7TCYE*M6/R%3N2I3IG+TBI2 WKY*M6/R%N*M6/R%+NBI" &1* B 3B:I7ESX2 ?R+LCL3N7U7BKE*M>J2%;T*IB *1BI2 N 2IWN+XCT3R3O7LB +U7T+UCP3ASN2 S7EKA6 WCT*M6/R%+NBI" &1* B 3D:I7ESX2 ?R+LCL3S7A3P	L+NCG3CSOE*M6/R%+NBI" &1* B 3E:I
ESX2 ?R+LCL3S	L7T^ 7ISD+H" +M	M*M>J2%;T*IB *1BI2 Z 2IWN+XCT3R3O3LN 7HCO2 WL7NSG+H" +M	M*M>J2%;T*M>J2%;T*IB *2BI2 J 2I	S3SWT7RJ 3O3L6 WC3T: 3UKME7R*JV/T7N*JV/T	N. N *IB " 	B7CKU3R;E7TJ 3O3L6 WN3MWBR*M6/R%+NBI" &3* B 3CNI7UKR7ESN2 ?R+LCL7PSU6-CU2 ;A7DN 3HGE
RN U7T*JV/T	N. N *IB " 	D7CKU3R;E7TJ 3O3L2 GS3M3P3I
N2 ?CD7E*JV/T	N. N *IB " 	E7CKU3R;E7TJ 3O3L2 3S+ICT3WSI+TCH2(7M")*M6/R%N*M6/R%+NBI" &4* B 3BRI3AWT*M>J2%;T*IB *4BI2 N 2IS7ISF2 ?CD7E*JV/T	N. R *IB " 	D3OWP7RSA+OCR3CSOE*M6/R%N*M"/*M6/R%7WRI+HCE*"KA2 ?C7NKT+OCL7K	E2 GH7SR +WCO3F;U3C	T7OON2,N 3LGE7RR +HCE*M
J6IWC3RWR+NCT7DOI3PGL3YF +NCD7M[O7ER +HCE3SGT7TOU2 	L7GSH2 ?T2 TE*M2/:I7ESX2 ?P7SSI3I;O2.& 3FF 6 WN3MWB3R" +ACS3BWE3NV 3NWT3RSE2 ;O*M>J2IT7EJ /TF02 T+EJ +AB"7K	E2 	W+LCL3CWL+ACR3TWH2 	D3S3P+ACY3ASN*M>J2IWT+LCL7MOA7TR 3O& 3G?N+RCE3TWH2 ;E7TKE+ECD3N7U7BKE2.
 7FR H7E"J&/*"KA2 WK3Y& 7SN 7TWR+CCK3WWH7NR 7HKE3E& 3S: 3OR 3AGT2 WB3I
N*M>J2I	D3S3P3AWY+DB,3TWH6 SS7AWT3S2 3IG7T^ 3I3L2 SA3V;A+CCE+TCO3TWH*M>J2IT3E: 7ESX2 ?P7SSI3I;O".*M"L6/"J6/*JV/7RJI/TF02 GD+TCA3DOE3OWD2 ?R3U	TN7E"J6/*JV/T	W3DOE3OWD2 ;A7DB 3ROO7EOS2 GD+TCA7ESN3EWR3DJ 7YR +HCE3MOA3H;IE*M2/>I7PKE3A?T3R> 7NR +HCE/RCT21R 3AG
2 WT3R	M3N3A".*M"/*M"/*M3SGT+R3T2 N L7B2JNIA7L6JNI3ESNW&I2/?G2 ?T2 3S7ECE6 R	+ICL7NE7TR 3IWM"M&J/RCT"1*M6ISR2061S7G"J*M2I3CB*M2IGT+D" 3RST3B[U*-&16IN/+ECT+UCP+ACN7ASU3O&-3NWD3XZ +OCR3TWH6 SR"0612JRI+CCA/XGR*0>I7DSA3AJ 3U[F+ECR3AWRA6.6JRI+ACD7ROT3ISN2I&/7S
 +HCE3SGT7TOU2 ;I3DOI3A?T3RN 3OWD* B=.1> "M&J3C3L2 GRR*M6I+SA*M2I7J7PJ /TCD*5>I+N3O2 WK+ECP3L?O3K;IG*M"/*M"/*M2/RI3E?C+DCE7N
E2 ?R+LCL7DSAA*M"/*M"/*M2I3C3BN +MCA3R3A6I&/+E3S6 OI2 T3EZ 3UON3T?I3NN 3OWD* B=/B> "M&J3TSA6 SR3F;UC*M6I+SA6 2J*I+MCP3RST"0&12/?N2,. 7ECE2 ?L3O	KN7G2J*I+MCS3R7T7OKV6I&/+E3S2 ?G2 ?M+VCE3TWH2 WN+XCT3R3O3L: 3UKME7R2JNI7RT"0&16IR/7OR +HCE7TE3TF 3RGE".*M6IOI3Z
 7EKWN	F2/WS7TR +HCE3R3O3L: 3UKM+ECR7ESN3EWR3DZ 3L
A"M&J/ASC.0B0"M&J7JOM6 KC3T
M+A>I+GCO3R7E3OWV2 T+EJ 7ESN+ECR7NE7TJ 3O3L"M&J7MCO/M"0*I>I7DSA+AB"7MOE3S
A3EZ 3R7O2 T3ER 7ICS7L	A".*M2I7J7PJ /TKD*1>I+GCO+TCO3TWH2 ?R3U	T+NCE3E	XT*M6MJJ/TCD"1&,3TSA* 6("1&)6/OI2 T3EZ 3UON3T?I3NN 3OWD* B=/C> "M&J3SGZ"M&J7JCM6 SR/DJ02I:/+OB,3KWE3P2 3O/O3I
N"M&J7JOM6 SR7M[O+P>I7YOE2,^ 3O6 3OWV2 T3E: 7ESX2 ?R+LCL7PSU6-CU"M&J7CSR/XJ0*I>I+TCO3TWH2 WT+XCT3AWRA*M2IOD3A: 3SWHA	R2/GS+VCE3TWH2 WN7WN 3HGE3RN +UCT3D
I+I;T"M&J3TSA6 SR3DJ0"M&J3CGI"M&J3DGC6 CN7UCT+F>I7SSE2 T7EB +U7T+UCP7ESN3EWR3DZ 3L
A"M&J7JCM6 SR/DF22I^/7OR 7OR +HCE7RWO3T;I3EV 7XSI"M6J*J>L6MJJ/TCD"2&,3TSA* 6("1&)6/OI2 T3EZ 3UON3T?I3NN 3OWD* B=/D> "M&J3SGZ"M&J7JCM6 SR/DN02I:/+OB,3KWE3P2 3O/O3I
N"M&J7JOM6 SR7M[O+S>I7YOE2,^ 3O6 3OWV2 T3E: 7ESX2 ?R+LCL3S7A3P	L+NCG"M&J7CSR/XN0*I>I3CSO7ER 7OR +HCE7TE3TF 3RGE".*M2IOD3A: 3S7AC	D2/GS+VCE3TWH2 WN7WN 7ACM3L;I3GN 3OWD" 6.2J*I+MCP3RST"2&12/?G2 ?T2 T7EJ 7OSU3IWN6 EI7T6JSR/DN06,RI+ACD.(F-*)>I+ICS3TWH6 WF7NSC
I;O2 ?C+DCE2=V " 6?6JNIZ7A2J*I+MCP3RST"0&42/?N2,. 7ECE2 ?L3O	KN7G2J*I+MCS3R7T7O
V6I&/+E3S2 ?G6 KP3OWC+SCS3TWH2 WN+XCT3R3O7LN 7LSI"M&J7CSR/XR0*I>I2 	W3DT".*M6ION7LSIC&I6/WP7TR +HCE7NE7TJ 3O3L2 	W3DT2 WH+R;E"M&J7JCM6 SR/DF22I^/7OR 7OR +HCE7RWO3T;I3EV 7XSI"M6J6JSR/DR06,RI+ACD.(F-*)>I+ICS3TWH6 WF7NSC3I;O2 ?C+DCE2=Z " 6?6JNIZ7A2J*I+MCP3RS
"2&02/?N2,^ 3OR 7ICS7L	A2 T3ER 3AGT6 KE7RKO6 OMG*M2I7J7SJ 3T?MV	C2/WY+SB,+GCO7M[O7ER +HCE7N
E2 C+OCP3L;E3GT"M&J7CSR/XV0*I>I+TCO3TWH2 WT+XCT3AWR3AF +NCD7SSE6 CU2 TE*M"I&I2/C+OCP3L;E3GT2 GD+TCA7FKO2 ;E3D>-7FJ-3O3L"M&J*I>I3S7U7MKA7YR 3IWM".*M"/*M"/*M2/RI3E?C+DCE3TWH2 	S3SWT7RJ 3O3L6 WN3MWBR*M"/*M"/*M3RST*0252I3C7LJ A	R2I&/7SR +HCE3SGT7TOU2 ;I3DOI3A
T3RN 3OWD* B=.2> "M&J3SGZ"M&J7JCM6 SR/DB12I:/+OB,3KWE3P2 3O/O3I
N"M&J3CKL2 7C7AJ A	L2/WY+SB,+ICS3TWH6 WF7NSC3I;O2 ?C+DCE2=J " 6?6JRI+ACD3R[T3UON"M&J3SGZ"M&J7JCM6 SR/DB22I:/+OB,+GCO7DOI3PGL7YR +HCE7DSA3AV 3R?R3R6 S7G"J*M2I3C3BN M	A6I&/+E3S2 ?G2 C3E/C2 T+ACT3O3N/YF 2 	D7GSI2 GWS*M2I7J7SJ 3TODH	K2/;E7TKEE7D6JRI+ACD6(KC/T
X.6V+*)>I7YOE2,^ 3O6 3OWV2 T7EN 7ISS+ECR3R3O3LN U7T2JRI+CCA/XGR*1>I3N7U7BKE2 ?T2 T3EN 7UKR7ESN2 ?R+LCL7TET*M2IGT+D" .7B0*)>I3AWRA*M2I7J7SJ 3T?MV616JRI+ACD6(KC/TCX.6Z+*)>I7GSE2 T7EN 7ISS+ECR3R3O3LN +UCT3N7U7BKE2 ;I"M&J*I>I3AOS+ICI3ASN2 	G+VCE+TCO3TWH2 GS3M
PE*M2IOD7AN 7RWCT	N2/?R3U	T7NOE"M&J7I+S2 	S3S3R+F>I7SSE2 T7EN 7ISS+ECR3R3O3LZ 3L
A"M&J3TSA2 N(7RT*0&62I^/3ON +UCE3TWH6 WC3RWR+NCT3R3O3L: 3UKM+ECR7TET*M2I7J7SJ 3TSO	W2/?F3RR 7ICS7L	A"M&J7JCM6 SR/DF22I^/7OR 7OR +HCE7RWO3T;I3EV 7XSI"M2J"M&J3P
AE*M"L6/"J6/"J&/3DOE3OWD6 WC3RWR+NCT3R3O3LR 3AGT2 C3A
NE7S"J6/"J6/6JSR/DB12,NI+LCL7RKA*I>I+ICS3TWH6 SS7AWT3S& 3N	D7CSA+OCR3CSO/E6 * B3"?*M6I+SA*M2I7J7PJ /TGD*4>I+N3O2 WK+ECP3L?O3K;IG*M2I3C3BN +MCA3R3A6I&/+E3S6 OI2 T3EZ 3UON3T?I3NN 3OWD* B=/B> "M&J3TSA6 SR3F;UC*M6I+SA*M2I7J7PJ /TGD*1>I+N3O2 WK+ECP3L?O3K;IG*M2
7J7SJ 3T?MV	R2/WY+SB,+GCO7M[O7ER +HCE7CKU3R;E7TJ 3O3L"M&J7CSR/XZ0*I>I3N7U7BKE2 ?T2 T7ER 7ESX6 KA+E;A"M&J3C[D. B2"M&J7I+S* CI6(KM3O3LF&)2/WS7TR +HCE7M[O7EJ 3O3L6 WN3MWB3RZ L7G2J*I+MCP3RST"2&12/?G2 ?T2 T7EJ 7OSU3IWN6 EI7T"J*M3RST*1212IGT+D" *-&12I&/7SR +HCE
F;U3C	T+OCN3CSO/E6 * CC"?*M6I+SA*M2I7J7PJ /TGD*2>I+N3O2 WK+ECP3L?O3K;IG*M2I7J7SJ 3T?MV	P2/WY+SB,+GCO7M[O7ER +HCE7CKU3R;E7TJ 3O3L"M&J7CSR/X^0*I>I7PSU6-CU2 ?T2 T7ER 7ESX6 KA+E;A"M&J3DGC2 S7EKAC*M2ISC/FJ "0*M6IOI3Z& 2 :(3P?C+D	E6IN/+ECT3TWH2 WN7WB +U7T+UCP3C
O3EZ 3L
A".*M2ISC/FF "0*M2IGT7DJ /TCD+B>I7ROE+ECT3TWH6 WC3RWR+NCT7PSU6 CU2 ;I. GF".*M2I	CA*M2IOD3A& 6 B(7UWT+P&1"M&J7JCM6 SR/DF22I^/7OR 7OR +HCE7RWO3T;I3EV 7XSI".*M6MJJ/TGD"2&,3TSA* 6("1&)6/OI2 T3EZ 3UON3T?I3NN 3OWD* B=/D> "M&J3SGZ"M&J7JCM6 SR/DN12I:/+OB,3KWE3P2 
O/O3I
N"M&J7JOM6 SR7M[O+S>I7YOE2,^ 3O6 3OWV2 T3EN 7UKR7ESN2 ?RL7L2JNI7RT"0&86IN/7ACM3L;I3GN 3OWD2 ?T2 T7ER 7ESX6 KA+E;A"M&J3C[D. B2"M&J3DGC* CI2(GP3T?CN&)6/CU7DSA7ER +HCE7CKU3R;E7TN 7ACM3L;IG*M"I&I2/GP3TWT+RCN7ISN7E[R+A;L"M&J7I+S* CI6(ON3CSOE&)2/WS7TR +HCE7N
E2 GS3M3P3I
N2 ?C+DCE3FGL3GZ O7R2J*I+MCP3RST"2&12/?G2 ?T2 T7EJ 7OSU3IWN6 EI7T6JJL/TGD"3&,3TSA* 6("1&)6/OI2 T3EZ 3UON3T?I3NN 3OWD* B=/E> "M&J3SGZ"M&J7JCM6 SR/DR12I:/+OB,3KWE3P2 3O/O3I
N"M&J7JOM6 SR7M[O+W>I7YOE2,^ 7OB 3ROO7EOS2 T3EN 7UKR7ESN2 ?RL7L2JNI7RT"0&9*IB/3S	L7T^ 7ISD3HR 3AGT".*M2I3S3IOT*I>I7PSU6 WC3RWR+NCT3WSI+TCH7HKEE6.2J*I+MCP3RST"2&12/?G2 ?T2 T7EJ 7OSU3IWN6 EI7T"J6/"J6/"J&/3DOE3OWD2 WN3W" 3ESA3I
N2 ;I7FKO7MSA3I;O*M>J*M>J6MJJ/TGD"4&,3C3L2 GRR&I6/OI2 T7EN 7TSA+UCS3ISN3IGC7TKO2 ?C+DCE.=R " 6?6JNIZ7A2J*I+MCP3RST"2&02/?N2,^ 3OR 7ICS7L	A2 T3ER 3AGT6 KE7RKO6 OMG*M2I3C3BN +MCA3R3A6I&/+E3S6 OI2 T3EZ 3UON3T?I3NN 3OWD* B=/B> "M&J3TSA6 SR3F;UC*M6I+SA*M2I7J7P
 /TGD*6>I+N3O2 WK+ECP3L?O3K;IG*M2IGT+D" *-&66I&/+E3S2 ?G2 C3E/C2 T+ACT3O3N/YZ 2 	D7GSIS*M2I7J7SJ 3TODH	K2/WW+RCE7ESN3EWR/D> "M&J3TSA2 N(3RT*0.1"2&)2/WS7TV 3PF 3NF 3U?T2-;I7DE2 ?F7RR +HCE7TET*M2IOD7A" /RF1*I>I3AWRA*M2I7J7SJ 3T?MV&22/?G2 ?M+VCE3TWH2 ?M3NT"M
J7I+S6 KX"1612J*I+MCS3R7T/OKV2I^/3O6 3OWV2 T3ER A7Y2J&I+SCZ/XGR"1*M2I7J7SJ 3T?MV&22/?G2 ?M+VCE3TWH2 WYA7R"J*M2I7J7SJ 3TGDT	E2/?G6 KP3OWC+SCS3TWH6 	S3SWT3MZ +OCR7ROT*/:8"M&J7JOM6 SR7DST+Y>I+GCO7OSU7PSU2 ;A3DR 7ICS7L	A2 T3E: +ECW7DSAE*M6IKC/TCH"1*M6MJJ/TGD"
&,3TSA* 6("1&)6/OI2 T3EZ 3UON3T?I3NN 3OWD* B=/C> "M&J3SGZ"M&J7JCM6 SR/D^12I:/+OB,3KWE3P2 3O/O3I
N"M&J3CKL2 7CA&I2/WY+SB,+GCO3CWH+CCK3TGH3T> 7N	L* B13D
I+ICT7WOA"M&J7JOM6 SR3DC+K>I7ESN3EWRD*M2IGT+D" 7CSR/HJ0*+&36IN/+ECT+UCP+ACN7ASU3O&-3NWD3XZ +OCR3TWH2 WTX7T2JRI+CCA/XGR"1&I6/KAE7A2J*I+MCS3R7T/OGV2I^/3O6 3OWV2 T7EN 3H[I3TN 3OWD2 ?T2 T7ER 7ESX"M&J3CKL2 GIC*M2IOD7AN 7HSFR	L2/WR7SSE2 T7EN 3H[I7TJ 3O3L6 WN3MW
3RZ +OCR3TWH"M&J*I>I3S7A3P	L+NCG7RWO3T;I+E;S"M&J7JOM6 SR7DST+Y>I+GCO7OSU7PSU2 ;A3DR 7ICS7L	A2 T3E: +ECW3S	HF7T2JNI3RT"0&22IN/3OWD".*M6LSR/D^16,RI+ACD.(F-*)>I+ICS3TWH6 WF7NSC3I;O2 ?C+DCE2=R " 6?6JNIZ7A2J*I+MCP3RST"2&02/?N2,^ 3OR 7ICS7L	A2 T3ER 3AGT6 KE7RKO
 OMG*M2I3C3BN +MCA3R3A6I&/+E3S2 ?G2 C3E/C2 T+ACT3O3N/YJ 2 	D7GSIS*M2I7J7SJ 3TODH	K2/WW+RCE7ESN3EWRD6.6JRI+ACD6(KC/TCH.3R+*)>I7SSE6 CU2 ;A6 WA+T7O3ISN+ECX7FKO2 T7ER 7ESX"M&J3DGC6 KX"1&12IF/3RGE"M&J7JOM6 SR7M[O*2>I+GCO7M[O7ER +HCE7N
E6 CO3EGR7TKO2 ?C+DCET7O"J&I6IR/+HCE7TE3TF 3RGE"M&J7JOM6 SR7DST+Y>I+GCO7OSU7PSU2 ;A3DR 7ICS7L	A2 T3E: E7W2JNI3RT"0&32I>/7PKE3A?T3RN 3OWD".*M"M&J3P
AE*M"L6/"J6/"J&/7DOI3PGL7YR +HCE2"GD+TCA7ESN+RCY7EKR+OKR2 WM3SGSG7E"J6/"J6/6JSR/DB22,NIL7B2J*I+MCS7CSR3MGG2I^/3ON +UCE3TWH2 R"3AGT2 ;E7T	R6 KE7RKO2"6 S7G2J6I3O7P"0&22IZ/+OCR7DOI3PGLY6.2JNIA7L6JNI3ESNW&I2/WD7L	A2 ?F/RV 2 WS3C;OD7S2JNI3LOOK*M2I3D7YOMG*M"I*M
IOA.4B0"0*M2I7J3SN 3R7TG	A2/?G2 3C7EKA2 T3E6 7EOS3AWG6 KF+OCM7DOI3PGLY*M2I?M/PCM"2*M"/*M"/*M2/:I3O7R+ACL7RWO3T;I3EV 7XSI*M>J*M>J6MJJ/TKD"1&,3C[D6 WCR*M2I7J7PN 7TKA+T>I+GCO3BOA7KR 7ON 3LWEP6 "J*M7D	L3M
S6,*I3B?L+CCK*3>I3D3E+ACY7MOE3S
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Feel free to contact me, David Gesswein djg@pdp8online.com with any questions, comments on the web site, or if you have related equipment, documentation, software etc. you are willing to part with.  I am interested in anything PDP-8 related, computers, peripherals used with them, DEC or third party, or documentation. 

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