int n_dochan;
        int ai_maxdata;
        unsigned int ai_ns_min;
-       unsigned int i8254_osc_base;
        const struct comedi_lrange *rangelist_ai;
        const struct comedi_lrange *rangelist_ao;
        unsigned int IRQbits;
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 33000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_bipolar10,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 33000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_pcl812pg_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_pcl812pg_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_acl8112dg_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_acl8112hg_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_pcl813b_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0x000c,
                .n_aichan_diff  = 8,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_pcl813b_ai,
                .IRQbits        = 0x000c,
        }, {
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_a821pgh_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0x000c,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_acl8112dg_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_acl8112hg_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 8000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_acl8112dg_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0x0fff,
                .ai_ns_min      = 8000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_acl8112hg_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0xffff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_pcl813b2_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
                .n_dochan       = 16,
                .ai_maxdata     = 0xffff,
                .ai_ns_min      = 10000,
-               .i8254_osc_base = I8254_OSC_BASE_2MHZ,
                .rangelist_ai   = &range_pcl813b2_ai,
                .rangelist_ao   = &range_unipolar5,
                .IRQbits        = 0xdcfc,
 
        if (cmd->convert_src == TRIG_TIMER) {
                tmp = cmd->convert_arg;
-               i8253_cascade_ns_to_timer(board->i8254_osc_base,
+               i8253_cascade_ns_to_timer(I8254_OSC_BASE_2MHZ,
                                          &divisor1, &divisor2,
                                          &cmd->convert_arg, cmd->flags);
                if (cmd->convert_arg < board->ai_ns_min)
        if (cmd->convert_src == TRIG_TIMER) {
                if (cmd->convert_arg < board->ai_ns_min)
                        cmd->convert_arg = board->ai_ns_min;
-               i8253_cascade_ns_to_timer(board->i8254_osc_base,
+               i8253_cascade_ns_to_timer(I8254_OSC_BASE_2MHZ,
                                          &divisor1, &divisor2,
                                          &cmd->convert_arg, cmd->flags);
        }