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1145
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1 **************************************************
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2 * System Call: F$SSVC
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3 *
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4 * Function: Allocate a 64 byte memory block
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5 *
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6 * Input: Y = Address of service request init table
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7 *
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8 * Output: None
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9 *
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10 * Error: CC = C bit set; B = error code
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11 *
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12 FSSvc ldy R$Y,u get pointer to table
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13 bra L037F start moving
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14 * Main move loop
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15 L036D clra clear MSB of table offset
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16 lslb multiply function # by 2 to get offset into table
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17 tfr d,u copy it to U
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18 ldd ,y++ get vector to function handler
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19 leax d,y offset X from current Y
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20 ldd <D.SysDis get system dispatch table pointer
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21 stx d,u save vector into place
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22 bcs L037F it was a privliged call, skip ahead
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23 ldd <D.UsrDis get user displat table pointer
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24 stx d,u save vector into place
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25 L037F ldb ,y+ get callcode
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26 cmpb #$80 done?
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27 bne L036D no, keep going
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28 rts return
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