mm-only debug patch...

[mmotm.git] / arch / m68k / atari / config.c

/*
 *  linux/arch/m68k/atari/config.c
 *
 *  Copyright (C) 1994 Bjoern Brauel
 *
 *  5/2/94 Roman Hodek:
 *    Added setting of time_adj to get a better clock.
 *
 *  5/14/94 Roman Hodek:
 *    gettod() for TT
 *
 *  5/15/94 Roman Hodek:
 *    hard_reset_now() for Atari (and others?)
 *
 *  94/12/30 Andreas Schwab:
 *    atari_sched_init fixed to get precise clock.
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

/*
 * Miscellaneous atari stuff
 */

#include <linux/types.h>
#include <linux/mm.h>
#include <linux/seq_file.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/vt_kern.h>
#include <linux/module.h>

#include <asm/bootinfo.h>
#include <asm/setup.h>
#include <asm/atarihw.h>
#include <asm/atariints.h>
#include <asm/atari_stram.h>
#include <asm/system.h>
#include <asm/machdep.h>
#include <asm/hwtest.h>
#include <asm/io.h>

u_long atari_mch_cookie;
EXPORT_SYMBOL(atari_mch_cookie);

u_long atari_mch_type;
EXPORT_SYMBOL(atari_mch_type);

struct atari_hw_present atari_hw_present;
EXPORT_SYMBOL(atari_hw_present);

u_long atari_switches;
EXPORT_SYMBOL(atari_switches);

int atari_dont_touch_floppy_select;
EXPORT_SYMBOL(atari_dont_touch_floppy_select);

int atari_rtc_year_offset;

/* local function prototypes */
static void atari_reset(void);
static void atari_get_model(char *model);
static void atari_get_hardware_list(struct seq_file *m);

/* atari specific irq functions */
extern void atari_init_IRQ (void);
extern void atari_mksound(unsigned int count, unsigned int ticks);
#ifdef CONFIG_HEARTBEAT
static void atari_heartbeat(int on);
#endif

/* atari specific timer functions (in time.c) */
extern void atari_sched_init(irq_handler_t);
extern unsigned long atari_gettimeoffset (void);
extern int atari_mste_hwclk (int, struct rtc_time *);
extern int atari_tt_hwclk (int, struct rtc_time *);
extern int atari_mste_set_clock_mmss (unsigned long);
extern int atari_tt_set_clock_mmss (unsigned long);


/* ++roman: This is a more elaborate test for an SCC chip, since the plain
 * Medusa board generates DTACK at the SCC's standard addresses, but a SCC
 * board in the Medusa is possible. Also, the addresses where the ST_ESCC
 * resides generate DTACK without the chip, too.
 * The method is to write values into the interrupt vector register, that
 * should be readable without trouble (from channel A!).
 */

static int __init scc_test(volatile char *ctla)
{
        if (!hwreg_present(ctla))
                return 0;
        MFPDELAY();

        *ctla = 2;
        MFPDELAY();
        *ctla = 0x40;
        MFPDELAY();

        *ctla = 2;
        MFPDELAY();
        if (*ctla != 0x40)
                return 0;
        MFPDELAY();

        *ctla = 2;
        MFPDELAY();
        *ctla = 0x60;
        MFPDELAY();

        *ctla = 2;
        MFPDELAY();
        if (*ctla != 0x60)
                return 0;

        return 1;
}


    /*
     *  Parse an Atari-specific record in the bootinfo
     */

int __init atari_parse_bootinfo(const struct bi_record *record)
{
        int unknown = 0;
        const u_long *data = record->data;

        switch (record->tag) {
        case BI_ATARI_MCH_COOKIE:
                atari_mch_cookie = *data;
                break;
        case BI_ATARI_MCH_TYPE:
                atari_mch_type = *data;
                break;
        default:
                unknown = 1;
                break;
        }
        return unknown;
}


/* Parse the Atari-specific switches= option. */
static int __init atari_switches_setup(char *str)
{
        char switches[strlen(str) + 1];
        char *p;
        int ovsc_shift;
        char *args = switches;

        if (!MACH_IS_ATARI)
                return 0;

        /* copy string to local array, strsep works destructively... */
        strcpy(switches, str);
        atari_switches = 0;

        /* parse the options */
        while ((p = strsep(&args, ",")) != NULL) {
                if (!*p)
                        continue;
                ovsc_shift = 0;
                if (strncmp(p, "ov_", 3) == 0) {
                        p += 3;
                        ovsc_shift = ATARI_SWITCH_OVSC_SHIFT;
                }

                if (strcmp(p, "ikbd") == 0) {
                        /* RTS line of IKBD ACIA */
                        atari_switches |= ATARI_SWITCH_IKBD << ovsc_shift;
                } else if (strcmp(p, "midi") == 0) {
                        /* RTS line of MIDI ACIA */
                        atari_switches |= ATARI_SWITCH_MIDI << ovsc_shift;
                } else if (strcmp(p, "snd6") == 0) {
                        atari_switches |= ATARI_SWITCH_SND6 << ovsc_shift;
                } else if (strcmp(p, "snd7") == 0) {
                        atari_switches |= ATARI_SWITCH_SND7 << ovsc_shift;
                }
        }
        return 0;
}

early_param("switches", atari_switches_setup);


    /*
     *  Setup the Atari configuration info
     */

void __init config_atari(void)
{
        unsigned short tos_version;

        memset(&atari_hw_present, 0, sizeof(atari_hw_present));

        /* Change size of I/O space from 64KB to 4GB. */
        ioport_resource.end  = 0xFFFFFFFF;

        mach_sched_init      = atari_sched_init;
        mach_init_IRQ        = atari_init_IRQ;
        mach_get_model   = atari_get_model;
        mach_get_hardware_list = atari_get_hardware_list;
        mach_gettimeoffset   = atari_gettimeoffset;
        mach_reset           = atari_reset;
        mach_max_dma_address = 0xffffff;
#if defined(CONFIG_INPUT_M68K_BEEP) || defined(CONFIG_INPUT_M68K_BEEP_MODULE)
        mach_beep          = atari_mksound;
#endif
#ifdef CONFIG_HEARTBEAT
        mach_heartbeat = atari_heartbeat;
#endif

        /* Set switches as requested by the user */
        if (atari_switches & ATARI_SWITCH_IKBD)
                acia.key_ctrl = ACIA_DIV64 | ACIA_D8N1S | ACIA_RHTID;
        if (atari_switches & ATARI_SWITCH_MIDI)
                acia.mid_ctrl = ACIA_DIV16 | ACIA_D8N1S | ACIA_RHTID;
        if (atari_switches & (ATARI_SWITCH_SND6|ATARI_SWITCH_SND7)) {
                sound_ym.rd_data_reg_sel = 14;
                sound_ym.wd_data = sound_ym.rd_data_reg_sel |
                                   ((atari_switches&ATARI_SWITCH_SND6) ? 0x40 : 0) |
                                   ((atari_switches&ATARI_SWITCH_SND7) ? 0x80 : 0);
        }

        /* ++bjoern:
         * Determine hardware present
         */

        printk("Atari hardware found: ");
        if (MACH_IS_MEDUSA) {
                /* There's no Atari video hardware on the Medusa, but all the
                 * addresses below generate a DTACK so no bus error occurs! */
        } else if (hwreg_present(f030_xreg)) {
                ATARIHW_SET(VIDEL_SHIFTER);
                printk("VIDEL ");
                /* This is a temporary hack: If there is Falcon video
                 * hardware, we assume that the ST-DMA serves SCSI instead of
                 * ACSI. In the future, there should be a better method for
                 * this...
                 */
                ATARIHW_SET(ST_SCSI);
                printk("STDMA-SCSI ");
        } else if (hwreg_present(tt_palette)) {
                ATARIHW_SET(TT_SHIFTER);
                printk("TT_SHIFTER ");
        } else if (hwreg_present(&shifter.bas_hi)) {
                if (hwreg_present(&shifter.bas_lo) &&
                    (shifter.bas_lo = 0x0aau, shifter.bas_lo == 0x0aau)) {
                        ATARIHW_SET(EXTD_SHIFTER);
                        printk("EXTD_SHIFTER ");
                } else {
                        ATARIHW_SET(STND_SHIFTER);
                        printk("STND_SHIFTER ");
                }
        }
        if (hwreg_present(&st_mfp.par_dt_reg)) {
                ATARIHW_SET(ST_MFP);
                printk("ST_MFP ");
        }
        if (hwreg_present(&tt_mfp.par_dt_reg)) {
                ATARIHW_SET(TT_MFP);
                printk("TT_MFP ");
        }
        if (hwreg_present(&tt_scsi_dma.dma_addr_hi)) {
                ATARIHW_SET(SCSI_DMA);
                printk("TT_SCSI_DMA ");
        }
        /*
         * The ST-DMA address registers aren't readable
         * on all Medusas, so the test below may fail
         */
        if (MACH_IS_MEDUSA ||
            (hwreg_present(&st_dma.dma_vhi) &&
             (st_dma.dma_vhi = 0x55) && (st_dma.dma_hi = 0xaa) &&
             st_dma.dma_vhi == 0x55 && st_dma.dma_hi == 0xaa &&
             (st_dma.dma_vhi = 0xaa) && (st_dma.dma_hi = 0x55) &&
             st_dma.dma_vhi == 0xaa && st_dma.dma_hi == 0x55)) {
                ATARIHW_SET(EXTD_DMA);
                printk("EXTD_DMA ");
        }
        if (hwreg_present(&tt_scsi.scsi_data)) {
                ATARIHW_SET(TT_SCSI);
                printk("TT_SCSI ");
        }
        if (hwreg_present(&sound_ym.rd_data_reg_sel)) {
                ATARIHW_SET(YM_2149);
                printk("YM2149 ");
        }
        if (!MACH_IS_MEDUSA && hwreg_present(&tt_dmasnd.ctrl)) {
                ATARIHW_SET(PCM_8BIT);
                printk("PCM ");
        }
        if (hwreg_present(&falcon_codec.unused5)) {
                ATARIHW_SET(CODEC);
                printk("CODEC ");
        }
        if (hwreg_present(&dsp56k_host_interface.icr)) {
                ATARIHW_SET(DSP56K);
                printk("DSP56K ");
        }
        if (hwreg_present(&tt_scc_dma.dma_ctrl) &&
#if 0
            /* This test sucks! Who knows some better? */
            (tt_scc_dma.dma_ctrl = 0x01, (tt_scc_dma.dma_ctrl & 1) == 1) &&
            (tt_scc_dma.dma_ctrl = 0x00, (tt_scc_dma.dma_ctrl & 1) == 0)
#else
            !MACH_IS_MEDUSA
#endif
            ) {
                ATARIHW_SET(SCC_DMA);
                printk("SCC_DMA ");
        }
        if (scc_test(&scc.cha_a_ctrl)) {
                ATARIHW_SET(SCC);
                printk("SCC ");
        }
        if (scc_test(&st_escc.cha_b_ctrl)) {
                ATARIHW_SET(ST_ESCC);
                printk("ST_ESCC ");
        }
        if (hwreg_present(&tt_scu.sys_mask)) {
                ATARIHW_SET(SCU);
                /* Assume a VME bus if there's a SCU */
                ATARIHW_SET(VME);
                printk("VME SCU ");
        }
        if (hwreg_present((void *)(0xffff9210))) {
                ATARIHW_SET(ANALOG_JOY);
                printk("ANALOG_JOY ");
        }
        if (hwreg_present(blitter.halftone)) {
                ATARIHW_SET(BLITTER);
                printk("BLITTER ");
        }
        if (hwreg_present((void *)0xfff00039)) {
                ATARIHW_SET(IDE);
                printk("IDE ");
        }
#if 1 /* This maybe wrong */
        if (!MACH_IS_MEDUSA && hwreg_present(&tt_microwire.data) &&
            hwreg_present(&tt_microwire.mask) &&
            (tt_microwire.mask = 0x7ff,
             udelay(1),
             tt_microwire.data = MW_LM1992_PSG_HIGH | MW_LM1992_ADDR,
             udelay(1),
             tt_microwire.data != 0)) {
                ATARIHW_SET(MICROWIRE);
                while (tt_microwire.mask != 0x7ff)
                        ;
                printk("MICROWIRE ");
        }
#endif
        if (hwreg_present(&tt_rtc.regsel)) {
                ATARIHW_SET(TT_CLK);
                printk("TT_CLK ");
                mach_hwclk = atari_tt_hwclk;
                mach_set_clock_mmss = atari_tt_set_clock_mmss;
        }
        if (hwreg_present(&mste_rtc.sec_ones)) {
                ATARIHW_SET(MSTE_CLK);
                printk("MSTE_CLK ");
                mach_hwclk = atari_mste_hwclk;
                mach_set_clock_mmss = atari_mste_set_clock_mmss;
        }
        if (!MACH_IS_MEDUSA && hwreg_present(&dma_wd.fdc_speed) &&
            hwreg_write(&dma_wd.fdc_speed, 0)) {
                ATARIHW_SET(FDCSPEED);
                printk("FDC_SPEED ");
        }
        if (!ATARIHW_PRESENT(ST_SCSI)) {
                ATARIHW_SET(ACSI);
                printk("ACSI ");
        }
        printk("\n");

        if (CPU_IS_040_OR_060)
                /* Now it seems to be safe to turn of the tt0 transparent
                 * translation (the one that must not be turned off in
                 * head.S...)
                 */
                asm volatile ("\n"
                        "       moveq   #0,%%d0\n"
                        "       .chip   68040\n"
                        "       movec   %%d0,%%itt0\n"
                        "       movec   %%d0,%%dtt0\n"
                        "       .chip   68k"
                        : /* no outputs */
                        : /* no inputs */
                        : "d0");

        /* allocator for memory that must reside in st-ram */
        atari_stram_init();

        /* Set up a mapping for the VMEbus address region:
         *
         * VME is either at phys. 0xfexxxxxx (TT) or 0xa00000..0xdfffff
         * (MegaSTE) In both cases, the whole 16 MB chunk is mapped at
         * 0xfe000000 virt., because this can be done with a single
         * transparent translation. On the 68040, lots of often unused
         * page tables would be needed otherwise. On a MegaSTE or similar,
         * the highest byte is stripped off by hardware due to the 24 bit
         * design of the bus.
         */

        if (CPU_IS_020_OR_030) {
                unsigned long tt1_val;
                tt1_val = 0xfe008543;   /* Translate 0xfexxxxxx, enable, cache
                                         * inhibit, read and write, FDC mask = 3,
                                         * FDC val = 4 -> Supervisor only */
                asm volatile ("\n"
                        "       .chip   68030\n"
                        "       pmove   %0@,%/tt1\n"
                        "       .chip   68k"
                        : : "a" (&tt1_val));
        } else {
                asm volatile ("\n"
                        "       .chip   68040\n"
                        "       movec   %0,%%itt1\n"
                        "       movec   %0,%%dtt1\n"
                        "       .chip   68k"
                        :
                        : "d" (0xfe00a040));    /* Translate 0xfexxxxxx, enable,
                                                 * supervisor only, non-cacheable/
                                                 * serialized, writable */

        }

        /* Fetch tos version at Physical 2 */
        /*
         * We my not be able to access this address if the kernel is
         * loaded to st ram, since the first page is unmapped.  On the
         * Medusa this is always the case and there is nothing we can do
         * about this, so we just assume the smaller offset.  For the TT
         * we use the fact that in head.S we have set up a mapping
         * 0xFFxxxxxx -> 0x00xxxxxx, so that the first 16MB is accessible
         * in the last 16MB of the address space.
         */
        tos_version = (MACH_IS_MEDUSA) ?
                        0xfff : *(unsigned short *)0xff000002;
        atari_rtc_year_offset = (tos_version < 0x306) ? 70 : 68;
}

#ifdef CONFIG_HEARTBEAT
static void atari_heartbeat(int on)
{
        unsigned char tmp;
        unsigned long flags;

        if (atari_dont_touch_floppy_select)
                return;

        local_irq_save(flags);
        sound_ym.rd_data_reg_sel = 14;  /* Select PSG Port A */
        tmp = sound_ym.rd_data_reg_sel;
        sound_ym.wd_data = on ? (tmp & ~0x02) : (tmp | 0x02);
        local_irq_restore(flags);
}
#endif

/* ++roman:
 *
 * This function does a reset on machines that lack the ability to
 * assert the processor's _RESET signal somehow via hardware. It is
 * based on the fact that you can find the initial SP and PC values
 * after a reset at physical addresses 0 and 4. This works pretty well
 * for Atari machines, since the lowest 8 bytes of physical memory are
 * really ROM (mapped by hardware). For other 680x0 machines: don't
 * know if it works...
 *
 * To get the values at addresses 0 and 4, the MMU better is turned
 * off first. After that, we have to jump into physical address space
 * (the PC before the pmove statement points to the virtual address of
 * the code). Getting that physical address is not hard, but the code
 * becomes a bit complex since I've tried to ensure that the jump
 * statement after the pmove is in the cache already (otherwise the
 * processor can't fetch it!). For that, the code first jumps to the
 * jump statement with the (virtual) address of the pmove section in
 * an address register . The jump statement is surely in the cache
 * now. After that, that physical address of the reset code is loaded
 * into the same address register, pmove is done and the same jump
 * statements goes to the reset code. Since there are not many
 * statements between the two jumps, I hope it stays in the cache.
 *
 * The C code makes heavy use of the GCC features that you can get the
 * address of a C label. No hope to compile this with another compiler
 * than GCC!
 */

/* ++andreas: no need for complicated code, just depend on prefetch */

static void atari_reset(void)
{
        long tc_val = 0;
        long reset_addr;

        /*
         * On the Medusa, phys. 0x4 may contain garbage because it's no
         * ROM.  See above for explanation why we cannot use PTOV(4).
         */
        reset_addr = MACH_IS_MEDUSA || MACH_IS_AB40 ? 0xe00030 :
                     *(unsigned long *) 0xff000004;

        /* reset ACIA for switch off OverScan, if it's active */
        if (atari_switches & ATARI_SWITCH_OVSC_IKBD)
                acia.key_ctrl = ACIA_RESET;
        if (atari_switches & ATARI_SWITCH_OVSC_MIDI)
                acia.mid_ctrl = ACIA_RESET;

        /* processor independent: turn off interrupts and reset the VBR;
         * the caches must be left enabled, else prefetching the final jump
         * instruction doesn't work.
         */
        local_irq_disable();
        asm volatile ("movec    %0,%%vbr"
                        : : "d" (0));

        if (CPU_IS_040_OR_060) {
                unsigned long jmp_addr040 = virt_to_phys(&&jmp_addr_label040);
                if (CPU_IS_060) {
                        /* 68060: clear PCR to turn off superscalar operation */
                        asm volatile ("\n"
                                "       .chip 68060\n"
                                "       movec %0,%%pcr\n"
                                "       .chip 68k"
                                : : "d" (0));
                }

                asm volatile ("\n"
                        "       move.l  %0,%%d0\n"
                        "       and.l   #0xff000000,%%d0\n"
                        "       or.w    #0xe020,%%d0\n"   /* map 16 MB, enable, cacheable */
                        "       .chip   68040\n"
                        "       movec   %%d0,%%itt0\n"
                        "       movec   %%d0,%%dtt0\n"
                        "       .chip   68k\n"
                        "       jmp     %0@"
                        : : "a" (jmp_addr040)
                        : "d0");
        jmp_addr_label040:
                asm volatile ("\n"
                        "       moveq   #0,%%d0\n"
                        "       nop\n"
                        "       .chip   68040\n"
                        "       cinva   %%bc\n"
                        "       nop\n"
                        "       pflusha\n"
                        "       nop\n"
                        "       movec   %%d0,%%tc\n"
                        "       nop\n"
                        /* the following setup of transparent translations is needed on the
                         * Afterburner040 to successfully reboot. Other machines shouldn't
                         * care about a different tt regs setup, they also didn't care in
                         * the past that the regs weren't turned off. */
                        "       move.l  #0xffc000,%%d0\n" /* whole insn space cacheable */
                        "       movec   %%d0,%%itt0\n"
                        "       movec   %%d0,%%itt1\n"
                        "       or.w    #0x40,%/d0\n" /* whole data space non-cacheable/ser. */
                        "       movec   %%d0,%%dtt0\n"
                        "       movec   %%d0,%%dtt1\n"
                        "       .chip   68k\n"
                        "       jmp     %0@"
                        : /* no outputs */
                        : "a" (reset_addr)
                        : "d0");
        } else
                asm volatile ("\n"
                        "       pmove   %0@,%%tc\n"
                        "       jmp     %1@"
                        : /* no outputs */
                        : "a" (&tc_val), "a" (reset_addr));
}


static void atari_get_model(char *model)
{
        strcpy(model, "Atari ");
        switch (atari_mch_cookie >> 16) {
        case ATARI_MCH_ST:
                if (ATARIHW_PRESENT(MSTE_CLK))
                        strcat(model, "Mega ST");
                else
                        strcat(model, "ST");
                break;
        case ATARI_MCH_STE:
                if (MACH_IS_MSTE)
                        strcat(model, "Mega STE");
                else
                        strcat(model, "STE");
                break;
        case ATARI_MCH_TT:
                if (MACH_IS_MEDUSA)
                        /* Medusa has TT _MCH cookie */
                        strcat(model, "Medusa");
                else
                        strcat(model, "TT");
                break;
        case ATARI_MCH_FALCON:
                strcat(model, "Falcon");
                if (MACH_IS_AB40)
                        strcat(model, " (with Afterburner040)");
                break;
        default:
                sprintf(model + strlen(model), "(unknown mach cookie 0x%lx)",
                        atari_mch_cookie);
                break;
        }
}


static void atari_get_hardware_list(struct seq_file *m)
{
        int i;

        for (i = 0; i < m68k_num_memory; i++)
                seq_printf(m, "\t%3ld MB at 0x%08lx (%s)\n",
                                m68k_memory[i].size >> 20, m68k_memory[i].addr,
                                (m68k_memory[i].addr & 0xff000000 ?
                                 "alternate RAM" : "ST-RAM"));

#define ATARIHW_ANNOUNCE(name, str)                     \
        if (ATARIHW_PRESENT(name))                      \
                seq_printf(m, "\t%s\n", str)

        seq_printf(m, "Detected hardware:\n");
        ATARIHW_ANNOUNCE(STND_SHIFTER, "ST Shifter");
        ATARIHW_ANNOUNCE(EXTD_SHIFTER, "STe Shifter");
        ATARIHW_ANNOUNCE(TT_SHIFTER, "TT Shifter");
        ATARIHW_ANNOUNCE(VIDEL_SHIFTER, "Falcon Shifter");
        ATARIHW_ANNOUNCE(YM_2149, "Programmable Sound Generator");
        ATARIHW_ANNOUNCE(PCM_8BIT, "PCM 8 Bit Sound");
        ATARIHW_ANNOUNCE(CODEC, "CODEC Sound");
        ATARIHW_ANNOUNCE(TT_SCSI, "SCSI Controller NCR5380 (TT style)");
        ATARIHW_ANNOUNCE(ST_SCSI, "SCSI Controller NCR5380 (Falcon style)");
        ATARIHW_ANNOUNCE(ACSI, "ACSI Interface");
        ATARIHW_ANNOUNCE(IDE, "IDE Interface");
        ATARIHW_ANNOUNCE(FDCSPEED, "8/16 Mhz Switch for FDC");
        ATARIHW_ANNOUNCE(ST_MFP, "Multi Function Peripheral MFP 68901");
        ATARIHW_ANNOUNCE(TT_MFP, "Second Multi Function Peripheral MFP 68901");
        ATARIHW_ANNOUNCE(SCC, "Serial Communications Controller SCC 8530");
        ATARIHW_ANNOUNCE(ST_ESCC, "Extended Serial Communications Controller SCC 85230");
        ATARIHW_ANNOUNCE(ANALOG_JOY, "Paddle Interface");
        ATARIHW_ANNOUNCE(MICROWIRE, "MICROWIRE(tm) Interface");
        ATARIHW_ANNOUNCE(STND_DMA, "DMA Controller (24 bit)");
        ATARIHW_ANNOUNCE(EXTD_DMA, "DMA Controller (32 bit)");
        ATARIHW_ANNOUNCE(SCSI_DMA, "DMA Controller for NCR5380");
        ATARIHW_ANNOUNCE(SCC_DMA, "DMA Controller for SCC");
        ATARIHW_ANNOUNCE(TT_CLK, "Clock Chip MC146818A");
        ATARIHW_ANNOUNCE(MSTE_CLK, "Clock Chip RP5C15");
        ATARIHW_ANNOUNCE(SCU, "System Control Unit");
        ATARIHW_ANNOUNCE(BLITTER, "Blitter");
        ATARIHW_ANNOUNCE(VME, "VME Bus");
        ATARIHW_ANNOUNCE(DSP56K, "DSP56001 processor");
}