System Specification for C65 | Fred Bowen | March 1, 1991 |
In "slow" CPU mode...
Total cycles no video 65 40 column SCM, MCM, ECM, BMM, 320 pixel BPM, BPO-BP3 only, or 640 pixel BPM, BPO-BP1 only no cost 0 80 column SCM, MCM, ECM, BMM, 320 pixel BPM, BPO-BP7, or 640 pixel BPM, BPO-BP3 substarct 40 Sprites substract 2 per active sprite
Examples...
No video on line 65 40 column text or equiv. BPS (no sprites) 65 80 column text or equiv. BPS (no sprites) 25 80 column text or equiv. BPS, all sprites 9 -- worst case 227 memory cycles/line 6 refresh 0-32 sprite 0,40,80,120,160 video fast slow ---- ---- 277 138 total cycles/line -6 -3 refresh -32 -16 sprites --- ---- 239 119 avail CPU cycles/line (no video) no 1 2 3 4 video fetch fetch fetch fetch ------ ------ ------ ------ ------- cpucyc 239 199 159 119 79 all sprites (fast) cpucyc 271 231 191 151 111 no sprites (fast) cpucyc 119 79 79 39 39 all sprites (slow) cpucyc 135 95 95 55 55 nosprites (slow)
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