IOBUFLEN
maxout += IOBUFLEN;
maxout = IOBUFLEN - 1 - maxout;
#define MSC_MEMPAD2 (0x2000 - NUMLINES * IOBUFLEN - IOBUFLEN)
u_char OutBuf[NUMLINES][IOBUFLEN]; /* 0x0200-0x08ff output bufs */
u_char InBuf[NUMLINES][IOBUFLEN]; /* 0x0900-0x0fff input bufs */
u_char InCtl[NUMLINES][IOBUFLEN]; /* 0x1000-0x16ff control data */
u_char CDBuf[IOBUFLEN]; /* 0x1700-0x17ff CD event buffer */
char tmpbuf[IOBUFLEN]; /* temp buffer for data transfers */