Running out of nano memory in RAM, only 2K bytes so rewrote 1802 disassembler so that all the disassembly information is in flash ROM.
Here's the side-program that disassembles 1802 hex codes;
https://pastebin.com/nVu7iVYz
New lines used look like this:
const char flashHiNib3[] PROGMEM = {"[00idl.][01ldn.L[10inc.L[20dec.L[30br.N[31bq.N[32bz.N[33bdf.N[34b1.N[35b2.N[36b3.N[37b4.N[38skp.][39bnq.N[3Abnz.N[3Bbnf.N[3Cbn1.N[3Dbn2.N[3Ebn3.N[3Fbn4.N[40lda.L[50str.L [60irx.L[61out.L[69inp.L[70ret.]abcd[71dis.][72ldxa.][73stxd][74adc.][75sdb.][76shrc.][77smb.][78sav.][79mark.][7Aseq.][7Breq.][7Caddi.N[7Dsdbi.N[7Eshlc.][7Fsmbi.N[80glo.L[90ghi.L[A0plo.L[B0phi.L[C0lbr.T[C1lbq.T[C2lbz.T[C3lbdf.T[C4nop.][C5lsnq.][C6lsnz.][C7lsnf.][C8lskp.][C9lbnq.T[CAlbnz.T[CBlbnf.T[CClsie.][CDlsq.][CElsz.][CFlsdf.][D0sep.L[E0sex.L[F0ldx.][F1or.][F2and.][F3xor.][F4add.][F5sd.][F6shr.][F7sm.][F8ldi.N[F9ori.N[FAani.N[FBxri.N[FCadi.N[FDsdi.N[FEshl.][FFsmi.N"}; //};
and..
Serial.println(F("All ready? "));
Got whole disassembler plus a few helper routines and sample data down to about 209 bytes.
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Think I've got it. On 1802 I/O is almost like DMA. For OUT 1 (0x61) the byte cycle after instruction fetch puts the address in R(x) ... -
Where we are at 23/3/2020 with 1802 project. Have 1802 hooked up to Arduino Mega2650 and running little programs that, for instance turn Q ... -
JUst completed Mega 2650 board shield with 1802 on it. Used EasyEDA and sent design to JLPCB. Here's Schematic: and here's the p...
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