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Diffstat (limited to 'libgloss/hp74x/README')
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diff --git a/libgloss/hp74x/README b/libgloss/hp74x/README deleted file mode 100644 index f27af18c9..000000000 --- a/libgloss/hp74x/README +++ /dev/null @@ -1,156 +0,0 @@ -*** Registers - GR0 *always zero - GR1 scratch - GR2 normal return register - GR27 Global Data Pointer (Must be set in crt0) - GR30 SP stack pointer - GR31 milicode return pointer - - SR* Space registers - - CR24-31 Temporary Control Registers - CR14 Vector Table Register (like VBR on an m68020) - CR0 Put in a count, causes exception when decremented to 0. - -FORTH's magic number is 031240 - -*** - Series 700/800 - The following options are also supported: - - -snnn set the initial system load (ISL) start address to - nnn in the volume label. This is useful when - building boot media for Series 700/800 systems. - - -lnnn specifies the length in bytes of the ISL code in - the LIF volume. - - -ennn set the ISL entry point to nnn bytes from the - beginning of the ISL. For example, specifying - - e3272 means that the ISL entry point is 3272 - (decimal) bytes from the beginning of the ISL - object module. - - -Knnn forces the directory start location to be the - nearest multiple of nnn x 1024 bytes from the - beginning of the volume. This is necessary for - booting Series 700/800 systems from LIF media. - - -n xxx Sets the volume name to be xxx. - lifinit -v64000000 -d64 -nISL10 -K2 -s4096 -l61440 -e5336 this_lif - -# lifcp -- -# -r Forces RAW mode copying. (file type BIN (-23951)) -# -T Sets the file type of the directory entry. -# -Knnn forces each file copied in to begin on a nnn x -# 1024-byte boundary from the beginning of the volume -# Note: the word echoed below MUST be 10 characters exactly. -# - (echo "FORTH ") | lifcp -r -T-030001 -K2 - this_lif:AUTO - - -# -# somxtract infile outfile -- -# converts a series 800 file *only* into a raw image - -It turns out the native cc and our current gcc produce series 700 -output, so in this case it runs till if fills up the hard disk. - -*** rombootlf5 is a FORTH interpreter in a "boot" image. (it won't run on -the HP742 board) - -lifls -l rombootlf5 -volume ISL10 data size 249984 directory size 8 94/04/20 10:26:36 -filename type start size implement created -=============================================================== -ISL -12800 16 240 0 94/04/20 10:26:36 -HPUX -12928 256 496 0 94/04/20 10:26:37 - IOMAP -12960 752 1504 0 94/04/20 10:26:37 -AUTO -12289 2256 1 0 94/04/20 10:26:38 -FORTH -12960 2264 208 0 94/04/20 10:26:38 -HPFORTH ASCII 2472 420 0 94/04/20 10:26:38 -BOOTROM ASCII 2896 3849 0 94/04/20 10:26:40 -PAD1 -12290 6752 1172 0 94/04/20 10:26:40 - -*** The ISL is only needed when booting the raw hardware. As we're runing -on a monitor (barely) all we need is a crt0 that initiallizes the GR27 -Global Data Pointer and zero's bss. - -*** Initial Program Load --------------------- -From page 11-56, architecture book. -0x00000000 +------------------------------------+ 0 - | LIF_MAGIC | | -0x00000004 +------------------------------------+ 4 - | | -0x000000F0 +------------------------------------+ 240 - | IPL_ADDR | -0x000000F4 +------------------------------------+ 244 - | IPL_SIZE | -0x000000F8 +------------------------------------+ 248 - | IPL_ENTRY | -0x000000FC +------------------------------------+ 252 - | | -IPL_ADDR +------------------------------------+ IPL_ADDR - | Position Independant | - | IPL Code | - | (including IPL_CHECKSUM) | - +------------------------------------+ IPL_ADDR + IPL_SIZE - | | - +------------------------------------+ - -IPL_ADDR 2 Kbyte aligned, nonzero -IPL_SIZE Multiple of 2Kbytes, <= 256 Kbytes -IPL_ENTRY Word aligned, less than IPL_SIZE - -Loads at IPL_START - -This is based on Cobra/Coral hardware: - LED register at 0xf080024 - I/O status register at 0xf0800000 - EEPROM at 0xf0810000 (LAN ID begins at byte 0) - -Here's a dump of the LIF volume header using "xd" (od with hex output) - -* -00000f0 0000 1000 0000 9800 0000 0000 0000 0000 - ^^^^ - This is the size -* -0000800 5445 5354 2020 2020 2020 a271 0000 0010 - ^^^^ ^^^^ ^^^^ ^^^^ ^^^^ ^^^^<-- this is the ipl offset - this is the vol name ^^^^<- this is the type - -0000810 0000 0098 9407 1919 1426 8001 0000 0000 - ^^^^ - This is the ipl size - -Interupts ---------- -The vector table is access by %iva (%cr14). The address here must be a -multiple of 2048. The indexes are: -1 high-priority -2 power failure -3 recovery counter -4 external interrupt -5 low-priority machine check -6 instruction TLB miss/instruction page fault -7 instruction memory protection -8 illegal instruction -9 break instruction -10 priviledged operation -11 priviledged register -12 overflow -13 conditional -14 assist exception -15 data TLB miss fault/data page fault -16 non access instruction TLB miss fault -17 non access page TLB miss fault/non access data page fault -18 data memory protection/unaligned data reference -19 data memory break -20 TLB dirty bit -21 page reference -22 assist emulation -23 higher-priority transfer -24 lower-priority transfe -25 taken branch |