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329 lines
13 KiB
Plaintext
329 lines
13 KiB
Plaintext
; 2021 didierv from dmaconcept / CEO Member.
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; Version 1.01 of the file, debugging some errors
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;
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; Sources:
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; Various Oric reference materials found online
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; Reference to Oric Atmos Rom 1.1
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; Oric a nu from Fabrice Broche
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; Oric Advanced User Guide from Leycester Whewell
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; The Rom disassembly
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*SYNOPSIS Oric Atmos model.
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; ---------------------------------------------------------------------------
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; Zero page
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BASIC_BUF @ $35
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CHARGOT @ $E8
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TXTPTR @ $E9
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PTRSCR @ $0C ; Indirect pointer for screen and Hex number construction area
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PTRSCR_H @ $0D
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PTRSCR2 @ $0E ; Indirect pointer for the screen.
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PTRSCR2_H @ $0F
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PTRHRS @ $10 ; Address of hires cursor.
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PTRHRS_H @ $11
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PTRTXT @ $12 ; Address of text cursor.
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PTRTXT_H @ $13
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WORKSPACE @ $14 ; Expression workspace.
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FLG_CTRL_C @ $17 ; Set to 1 if ‘CTRL C’ pressed, otherwise 0.
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PTRTOKEN @ $18 ; Tokenising pointer.
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PTRTOKEN_H @ $19
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PRT_READY @ $1A ; Jump location to print 'Ready'. ($CBEB)
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PTR_DOKE @ $1D ; Pointer for Doke
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ADR_CURSOR @ $1F ; Temp Calculation of cursor address.
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PTR_USR @ $21 ; Jump location for USR command.
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WK_EXPRESS @ $24 ; Expression workspace.
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TMP_STORAGE @ $27 ; Temporary storage — often for characters being printed.
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FLG_STRING @ $28 ; Set to #FF if dealing with strings.
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FLG_INTEGER @ $29 ; Bit 7 is set if using integer variable.
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FLG_DATA @ $2A ; Garbage collection flag or flag for skipping through DATA statements.
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FLG_INTEGER2 @ $2B ; Bit 7 when set inhibits the use of integers. Bit 6 when set indicates STORE or RECALL commands in use.
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FLG_REDO @ $2C ; Zero if REDOing input FROM START.
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; $2D Temporary storage for expression evaluator.
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; $2E CTRL O flag. 0 if output to screen enabled.
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; $2F Next byte to/from cassette.
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; $30 Cursor position for Basic printout.
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; $31 ; Screen line width +13
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; $32 8 - multiple line width.
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; $33,$34 Integer values to/from main floating point accumulator.
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; $35-$84 Input buffer. (79 bytes)
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; $35-$48 Name of program required for CLOAD (V1.0 only).
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; $49-$5D Name of program just loaded (V1.0 only).
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; $5F,$60 Start address of data to/from tape (V1.0 only).
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; $61,$62 End address of data to/from tape (V1.0 only).
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; $63 1 when using AUTO else 0 (V1.0 only).
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; $64 0 for Basic, 1 for machine code (V1.0 only).
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; $67 Tape speed - 0 fast, 1 slow (V1.0 only).
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; $85 String block stack pointer.
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; $86,$87 Address of top active string in memory.
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; $88-$90 Temporary string stack.
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; $91,$92 String address pointer.
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; $93,$94 General memory pointer.
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; $95—$99 Work area for multiply and divide routines.
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; $9A,$9B Start of Basic pointer.
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; $9C,$9D End of Basic pointer.
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; $9E,$9F End of variables pointer.
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; $A0,$A1 End of Arrays pointer.
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; $A2,$A3 Bottom of string area pointer.
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; $A4,$A5 Work pointer for allocating strings.
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; $A6,$A7 Himem.
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; $A8,$A9 Current line number, top byte is #FF if in command mode.
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; $AA,$AB Previous line number.
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; $AC,$AD Last line start address.
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; $AE,$AF Temporary copy of line number.
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; $B0,$B1 Data pointer.
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; $B2,$B3 Data pointer.
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; $B4,$B5 Last variable name accessed.
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; $B6,$B7 Address of last variable value accessed.
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; $B8,$B9 Destination pointer for temporary assignment of variable.
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; $BA Temporary storage for expression evaluator.
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; $BD—$C1 Temporary storage of floating point accumulator.
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; $BD,$BE FN (function) pointer.
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; $BF,$C0 String pointer.
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; $C2 String pointer size, used in Garbage Collection.
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; $C3—$C5 Jump location to evaluate numeric functions.
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; ($C5 also used as a temporary store of the rounding byte for mathematical operations).
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; $C6—$CA Temporary storage of floating point accumulator.
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; $C7,$C8 Pointer.
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; $C9,$CA Pointer.
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; $CB—$CF Temporary storage of floating point accumulator.
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; $CE,$CF Pointer for STORE.
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; $D0 Exponent of main floating point accumulator.
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; $D1—$D4 Mantissa of main floating point accumulator.
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; $D5 Sign of mantissa for main FPA when unpacked.
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; $D6 Series evaluation counter.
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; $D7 Sign extend byte.
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; $D8 Exponent of work floating point accumulator.
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; $D9—$DC Mantissa of work floating point accumulator.
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; $DD Sign of mantissa for work FPA when unpacked.
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; $DE,$DF String pointer.
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; $DE Holds Exclusive OR of sign byte of both FPAs.
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; $DF Rounding byte for calculations.
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; $E0,$E1 Array and string workspace.
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; $E2—$F2 Routine to step through program to find next non space char. (See $EC9C of disassembly).
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; $E9,$EA Position pointer in program.
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; $FA—$FE Copy of floating point number used by RND.
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; $FF Used in number to string conversion
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; ---------------------------------------------------------------------------
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; Page 1
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; ---------------------------------------------------------------------------
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; Page 2
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MODEKEY @ $0209 ; Key status (#38 - Default, #A2 - CONTROL, #A4 - Left SHIFT, #A5 - FUNCTION (Atm), #A7 - Right SHIFT)
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CAPSLOCK @ $020C ; $7F = not locked, $FF = locked
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PTR_SCR1 @ $0200 ; Pointer for screen handling (adress)
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PTR_SCR2 @ $0202 ; Pointer for screen handling (adress)
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WORK_HIRES @ $0204 ; 4 Work bytes for Hires routines
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KEY_DOWN @ $0208 ; Key address if pressed. (#38 if no key pressed)
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KEY_COLUMN @ $020A ; Saved key column for repeat.
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KEY_TMP @ $020B ; Temporary set by keyboard routines
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KEY_COUNTER @ $020E ; Repeat counter for keyboard.
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KEY_TMP_REPEAT @ $0210 ; Temporary store of row of key being tested for repeat.
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KEY_TMP_STROBE @ $0211 ; Temporary store of keyboard row during strobe routine.
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; $0212 Holds FB code in hires commands.
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PATTERN_DATA @ $0213 ; Pattern data for hires screen.
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; $0214 Temporary copy of pattern byte for drawing lines.
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; $0215 Holds position of pixel in byte corresponding to position of cursor on hires screen.
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; $0216,$0217 Temporary store of hires X and Y cursor positions.
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; $0218 Temporary store for content of $215.
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HIRES_CURSOR_X @ $0219 ; Hires cursor X coordinate.
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HIRES_CURSOR_Y @ $021A ; Hires cursor Y coordinate.
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HIRES_FLAG @ $021F ; 0 - LORES, 1 - HIRES.
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FLAG_48K @ $0220 ; 0 - 48K Oric, 1 - 16K Oric.
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; $0228-$022A Jump to IRQ routine (V1.0).
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; $022B-$022D Jump to NMI routine (V1.0).
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JMP_PR_CHR @ $0238 ; Jump to PRINT CHARACTER on screen (V1.1).
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JMP_GET_KEY @ $023B ; Jump to GET KEY routine (V1.1).
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JMP_PRT_BYT @ $023E ; Jump to SEND BYTE TO PRINTER (V1.1).
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; $0241-$0243 Jump to PRINT TO STATUS LINE (V1.1).
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; $0244-$0246 Jump to IRQ routine (V1.1).
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; $0247-$0249 Jump to NMI routine (V1.1).
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; $024A—$024C RTI instruction which can be intercepted by a jump (V1.1)
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FLAG_TAPE @ $024D ; Tape speed, 0 - fast, 1 - slow (V1.1).
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KB_DELAY @ $024E ; Keyboard initial repeat delay (V1.1).
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KB_DELAY_R @ $024F ; Keyboard successive repeat delay (V1.1).
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; $0251 Cursor enable in CTRL routines (V1.1).
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; $0252 ELSE pending flag, 1 - On, 0 - Off (V1.1).
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; $0256 Printer width (V1.1).
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; $0257 Screen width (V1.1).
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; $0258 Printer cursor position (V1.1).
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; $0259 Screen cursor position (V1.1).
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; $025A Cassette JOIN flag, off when 0 (V1.1).
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; $025B Cassette VERIFY flag, off when 0 (V1.1).
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; $025C Cassette verify error counter (V1.1) (2 bytes)
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; $025E,$025F Contains 1 byte messages printed to status line.
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; $0260 Used by GRAB command.
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; $0261,$0262 Indirect jump for CTRL character routine.
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; $0263,$0264 Temporary storage.
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; $0265 Current cursor state indicator, 0 - Off, 1 - On.
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; $0268 Cursor row number (Status line is row 0)
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; $0269 Cursor column position.
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; $026A Flag byte
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COLOR_PAPER @ $026B ; Paper colour (+16).
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COLOR_INK @ $026C ; Ink colour.
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; $026D,$026E Start address of screen memory.
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; $026F Number of text lines available on screen (V1.0).
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FLAG_CURSOR @ $0270 ; Cursor on/off flag.
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FLAG_INV @ $0271 ; Cursor invert flag.
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; $0272,$0273 Keyboard timer.
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; $0274,$0275 Cursor timer.
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; $0276,$0277 Spare counter, also used by WAIT (and printer in V1.0).
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; $0278,$0279 Address of second line on screen (V1.1).
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; $027A,$027B Address of first line on screen (V1.1).
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; $027C,$027D Number of characters normally used in screen scrolling (V1.1) = 26 rows x 40 columns = 1,040 bytes (#0410)
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; $027E Number of rows of text available (V1.1).
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; $027F-$028F Name of program to be loaded off cassette (V1.1).
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; $0290-$0292
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; $0293-$02A3 Name of file just loaded off cassette (V1.1).
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; $02A4-$02A8
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; $02A9,$02AA Start address of data to / from cassette (V1.1).
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; $02AB,$02AC End address of data to / from cassette (V1.1).
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FLAG_AUTO @ $02AD ; Auto indicator, 0 is off (V1.1).
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FLAG_TYPE @ $02AE ; Program type.
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; $02AF Array type, copy of $28 (V1.1).
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; $02B0 Array type, copy of $29 (V1.1).
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; $02B1 Bit 7 set to 1 if format error.
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; $02C0 Screen status (0 – GRAB, 2 – TEXT, 3 – HIRES)
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; $02C1,$02C2 Character set start address in HIRES mode (V1.1).
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; $02C3 Cursor movement in HIRES (0 – Absolute, 1 – Relative)
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KEY_LAST @ $02DF ; Latest key from keyboard. Bit 7 set if valid.
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; $02E0 Non zero if error in Sound / Graphics routines.
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PARAM_M1 @ $02E1 ; $02E1-$02E2 First parameter location for the sound and graphics commands, including INK & PAPER. (Lower byte of integer is at $02E1).
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PARAM_M2 @ $02E3 ; $02E3-$02E4 Second parameter location for the sound and graphics commands. (Lower byte of integer is at $02E3).
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PARAM_M3 @ $02E5 ; $02E5-$02E6 Third parameter location for the sound and graphics commands. (Lower byte of integer is at $02E5).
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PARAM_M4 @ $027E ; $02E7,$02E8 Fourth parameter location which is only used by MUSIC and PLAY. (Lower byte of integer is at $02E7).
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; $02F1 Bit 7 set to 1 if printer enabled.
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; $02F2 Bit 7 is EDIT flag, set to 1 when on.
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; $02F4 TRACE flag, set if bit 7 is set.
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; $02F5,$02F6 Indirect jump for '!' routine.
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; $02F8 Temporary row indicator for PLOT.
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; $02FB-$02FD Jump to '&' routine.
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PATTERN @ $0213
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IRQVec @ $0245 ; "fast" interrupt vector
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TAP_SPEED @ $024D ; Tape speed (0=fast, 1= slow)
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TAP_NAME @ $024F ; Tape name max 16 car, terminated by 0
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TAP_JOINFLAG @ $025A ; 0 = don't joiu, $4A = join BASIC programs
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TAP_VERIFYFLAG @ $025B ; 0 = load, 1 = verify
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TAP_ERRORS @ $025C ; count of verify errors (2 bytes)
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CURS_Y @ $0268
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CURS_X @ $0269
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STATUS @ $026A
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BACKGRND @ $026B
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FOREGRND @ $026C
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TIMER3 @ $0276
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CFILE_NAME @ $027F
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CFOUND_NAME @ $0293
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FILESTART @ $02A9
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FILEEND @ $02AB
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TAP_AUTORUN @ $02AD ; $00 = only load, $C7 = autorun
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TAP_LANGFLAG @ $02AE ; $00 = BASIC, $80 = machine code
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TAP_LOADERR @ $02B1 ; 0 = No errors during loading
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KEYBUF @ $02DF
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PARMERR @ $02E0
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PARAM1 @ $02E1 ; & $02E2
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PARAM2 @ $02E3 ; & $02E4
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PARAM3 @ $02E5 ; & $02E6
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PARAM4 @ $02E7 ; & $02E8
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BANGVEC @ $02F5
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; Rom 1.1 Entries
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; Routines call from Basic
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CALL @ $E946
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CHAR @ $F12D
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CIRCLE @ $F37F
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CLEAR @ $C70D
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CLOAD @ $E85B
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CONT @ $C9AD
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CLS @ $CCCE ; Clear Screen
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CSAVE @ $E909
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CURMOV @ $F0FD
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CURSET @ $F0C8
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DATA @ $CA3C
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DEF_FN @ $D4BA
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DIM @ $D17E
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DOKE @ $D967
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DRAW @ $F110
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EDIT @ $C692
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END @ $C973
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EXPLODE @ $FACB
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FILL @ $F2C8
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FOR @ $C855
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GET @ $CD46
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GOSUB @ $C9C8
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GOTO @ $C9E5
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GRAB @ $E8E7
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HIMEM @ $EBCE
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HIRES @ $EC33 ; Mode Hires
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IF @ $CA70
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INK @ $F21D
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INPUT @ $CD55
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LET @ $CB1C
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LIST @ $C748
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LLIST @ $C7FD
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LORES @ $D9DE
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LPRINT @ $C809
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MUSIC @ $FC18
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NEW @ $C6EE
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ON @ $CAC2
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PAPER @ $F204
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PATTERN @ $F11D
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PING @ $FA9F
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PLAY @ $FBD0
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PLOT @ $DA51
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POINT @ $F1C8
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POKE @ $D94F
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POP @ $CA12
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PRINT @ $CBAB
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PULL @ $DAA1
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READ @ $CD89
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RECALL @ $E9D1
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RELEASE @ $EC0C
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REM @ $CA99
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RESTORE @ $C952
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RETURN @ $CA12
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RUN @ $C9BD
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SHOOT @ $FAB5
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SOUND @ $FD40
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STOP @ $C971
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STORE @ $E987
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TEXT @ $EC21 ; Mode Text
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TROFF @ $CD10
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TRON @ $CD16
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UNTIL @ $DAA1
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WAIT @ $D958
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ZAP @ $FAE1
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SYMBOL_EXC @ $CD13 ; ! pour lancement de commandes
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SYMBOL_AMP @ $DADB ; & pour lancement de commandes
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; Some others ROM calls
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ROM_GETLINE @ $C592
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ROM_INK @ $F210
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ROM_VDU @ $F77C ; Print char X
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ROM_STOUT @ $F865 ; Print message on A,Y and position X (must be 0 at end)
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ROM_GTORKB @ $EB78 ; Last key pressed in X. IRQ must be on
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ROM_INTER_OFF @ $E76A
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ROM_INTER_ON @ $E93D
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ROM_TICK @ $FB14 ; Sound used for key pressed
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ROM_TOCK @ $FB2A ; Sound used for CTRL key pressed
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ROM_PLAY @ $FBD0 ; Same as basic call PLAY
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ROM_MUSIC @ $FC18 ; Same as basic call MUSIC
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ROM_SOUND @ $FB40 ; Same as basic call SOUND
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COLDSTART @ $F88F ; Full init
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WARMSTART @ $F8B2 ; Reset
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ROM_INIT @ $ECCC ; Init var page 0 and 2
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