Uncompressed - The Tech Heap

EXTENDED BASIC UNRAVELLED IIAPPENDIX AMEMORY MAPORIGIN:SPECTRAL ASSOCREVISED:12/26/1999 WALTER K ZYDHEK0667 COMMANDS TYPE COMMAND CODE0668 I RESTORE $030669 I SEEK $170670 I STEP $230671 I STEP IN $430672 I STEP OUT $530673 II READ SECTOR $800674 II WRITE SECTOR $A00675 III READ ADDRESS $C00676 III READ TRACK $E40677 III WRITE TRACK $F40678 IV FORCE INTERRUPT $D006790680 STATUS BIT TYPE I READ ADDRESS/SECTOR/TRACK WRITE SECTOR/TRACK0681 S0 BUSY BUSY BUSY0682 S1 INDEX DRQ DRQ0683 S2 TRACK 0 LOST DATA LOST DATA0684 S3 CRC ERROR CRC ERROR (EXCEPT TRACK) CRC ERROR (EXCEPT TRACK)0685 S4 SEEK ERROR RNF (EXCEPT TRACK) RNF (EXCEPT TRACK)0686 S5 HEAD LOADED RECORD TYPE (SECTOR ONLY) WRITE FAULT0687 S6 WRITE PROTECT WRITE PROTECT0688 S7 NOT READY NOT READY NOT READY06890690 FF49 RMB 1 TRACK REGISTER0691 FF4A RMB 1 SECTOR REGISTER0692 FF4B RMB 1 DATA REGISTER0693 FF4C RMB 4 FDCREG IMAGES06940695 FF50 RMB 16 UNUSED SPACE0696 FF60 RMB 1 X COORDINATE FOR X-PAD0697 FF61 RMB 1 Y COORDINATE FOR X-PAD0698 FF62 RMB 1 STATUS REGISTER FOR X-PAD0699 FF63 RMB 5 UNUSED0700 * RS-232 PROGRAM PAK0701 FF68 RMB 1 READ/WRITE DATA REGISTER0702 FF69 RMB 1 STATUS REGISTER0703 FF6A RMB 1 COMMAND REGISTER0704 FF6B RMB 1 CONTROL REGISTER0705 FF6C RMB 40706 FF70 RMB 130707 FF7D RMB 1 SOUND/SPEECH CARTRIDGE RESET0708 FF7E RMB 1 SOUND/SPEECH CARTRIDGE READ/WRITE0709 FF7F RMB 1 MULTI-PAK PROGRAMMING REGISTER07100711 FF80 RMB 64 RESERVED FOR FUTURE EXPANSION07120713 * VIDEO CONTROL REGISTERS0714 FF90 INIT0 RMB 1 INITIALIZATION REGISTER 007150716 FF90 BIT0 MC0 ROM MAP CONTROL (SEE TABLE BELOW)0717 BIT1 MC1 ROM MAP CONTROL (SEE TABLE BELOW)0718 BIT2 MC2 STANDARD SCS0719 BIT3 MC3 1 = DRAM AT 0xFEXX IS CONSTANT0720 BIT4 FEN 1 = CHIP FIRQ OUTPUT ENABLED0721 BIT5 IEN 1 = CHIP IRQ OUTPUT ENABLED0722 BIT6 M/P 1 = MMU ENABLED0723 BIT7 COCO 1 = COCO 1 & 2 COMPATIBLE07240725 MC1 MC0 ROM MAPPING0726 0 x 16K INTERNAL, 16K EXTERNAL0727 1 0 32K INTERNAL0728 1 1 32L EXTERNAL (EXCEPT FOR VECTORS)07290730 FF91 INIT1 RMB 1 INITIALIZATION REGISTER 107310732 FF91 BIT0 TR MMU TASK REGISTER SELECT0733 BIT10734 BIT20735 BIT30736 BIT40737 BIT5 TINS TIMER INPUT SELECT: 1=70ns, 0=63ns0738 BIT60739 BIT70740A10