By Rodnay Zaks
Ebook via Zaks, Rodnay
Read or Download Advanced 6502 Programming PDF
Best computers & technology books
American companies lose $30 billion a 12 months to absenteeism. This self-study booklet is helping you know the indications of absenteeism. A step by step plan, case reports, and routines can assist you chop absenteeism and raise worker productiveness.
This fresh textbook (with CD) has been especially written to help CIE's most modern IGCSE in info and verbal exchange know-how (0417). The authors are skilled examiners and lecturers, and convey a wealth of theoretical wisdom and useful event to either the ebook and the CD, making sure that scholars are absolutely ready for either the written idea paper in addition to the 2 functional papers.
Programming with JAVA, 3e accommodates all of the updates and improvements extra to Java 2 and J2SE five. zero unlock. The publication provides the language ideas in a really easy and easy-to-understand sort with illustrations and examples whereever useful.
Extra resources for Advanced 6502 Programming
SUMMARY This program uses a simple algorithm to remember and play tunes. All data and constants are stored in tables. Timing is implemented by nested loops. Indexed addressing techniques are used to store and retrieve data. Sound is generated by a square wave. EXERCISES Exercise 2-4: Change the note constants to implement a different range of notes. Exercise 2-5: Store a tune in memory in advance. " Exercise 2-6: Rewrite the program so that it will store the note and duration constants in memory when they are entered, and will not need to look them up when the tune is played.
9: Music Program 31 ADVANCED 6502 PROGRAMMING ; ROUTINE TO PLAY NOTES 0248 024A 024C 024E 024F A2 00 86 02 A5 02 4A AA PLAYEH LDX STX LDA LOOP LSR TAX 0250 0253 0255 0257 0259 025B 025C 025D 025E 025F 0262 0264 0267 0269 026B 026D 026F BD BO 29 90 29 4A 4A 4A 4A 20 A2 E6 A5 C5 90 60 02 02 00 DF LDA BCS AND BCC ENDBYT AND LSR LSR LSR LSR FINISH JSR LDX JSR INC LDA CHP BCC RTS 0270 0272 0274 0276 0279 027A 0279 027E 0280 0283 0286 C9 DO A2 20 60 OD 06 54 9C 02 BD 85 BD 20 60 D1 02 04 C4 02 AS 02 0287 0289 028B 028D 0290 0292 0295 0297 029A 0299 A9 85 A9 20 A9 20 A9 20 18 60 FF 04 4B AS 02 38 AS 02 4B AS 02 00 03 04 OF 06 FO 70 02 20 20 9C 02 to PTR PTR A ;CLEAR POINTER ;LOAD ACUH W/CURRENT PTR VAL ISHIFT NIBBLE INDICATOR INTO CARRY ;usE SHIFTED NIBBLE POINTER ;AS BYTE POINTER TABEG,X ;LOAD NOTE TO PLAY ENDBYT ;LOW NIBBLE USED, GET HIGH t~00001111 ;MASK OUT HIGH BITS FINISH ;PLAY NOTE t~11110000 ;THROW AWAY LOW NIBBLE A ISHIFT INTO LOW A A A PLAY IT 020 DELAY PTR PTR PI LEN LOOP ; ;CALCULATE CONSTANTS & PLAY ;BETWEEN-NOTE DELAY IONE NIBBLE USED ;END OF LIST'i' INO, GET NEXT NOTE ;DONE ;ROUTINE TO DO TABLE LOOK UP, SEPARATE REST I AA PLAYIT CHP BNE LDX JSR RTS SOUND TAX LDA STA LDA JSR RTS t13 SOUND 054 DELAY DURTAB,X DUR NOTAB,X TONE ;REST?
The player on the right (player 1) pushes key 42 PSEUDO RANDOM NUMBER GENERATOR ''C,'' and the bottom row of LEDs goes blank, as the answer is incorrect. Because player 1 did not guess correctly and he or she still has time left in this turn, a new number is offered to player 1. " He or she wins and now the left arrow lights up, indicating that it is player 2's turn. This time the number proposed is 10, 12, 15. " At this point, LEDs 10, 11, and 12 light up, indicating that the player is the winner for this turn as he/she has used less total time to make a correct guess than player 1.
Advanced 6502 Programming by Rodnay Zaks