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$93E8: Move sprites #0-#6 right by 64 pixels (2)
Used by the routine at $9868.
Input
X Bit 8 of the sprites' x-coordinates
$93E8 LDY #$0E Bits 0-7 of the x-coordinate of sprite #7 is at $D00E.
$93EA TXA Compensate for the TAX instruction coming next.
This entry point is used by the routine at $94E8.
$93EB TAX Transfer bit 8 of the sprites' x-coordinates to X.
$93EC DEY Decrease Y by 2 to point at bits 0-7 of the x-coordinate of the next sprite.
$93ED DEY
$93EE BPL $93F6 Branch if Y is still non-negative.
$93F0 STX $D010 Update bit 8 of the sprites' x-coordinates.
$93F3 JMP $9877 Enable sprites #0-#6.
$93F6 STY $94E9 Modify the LSB of the operand of the 'LDA nnnn' instruction at $94E8.
$93F9 STY $94EF Modify the LSB of the operand of the 'STA nnnn' instruction at $94EE.
$93FC JMP $94E8 Continue at $94E8.
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