Differences

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--- documentation:monitor:directpage [2014/03/22 22:02] – [3A: TEMPO] pulkomandy
+++ documentations:monitor:directpage [2014/06/19 17:13] – sandrus
@@ Line 43: / Line 43: @@
   * Bit 1: double height
   * Bit 6: foreground color change for whole screen
-  * Bit 7: background color chnage for whole screen
+  * Bit 7: background color change for whole screen
 ===== 2B: COLOR =====
@@ Line 159: / Line 159: @@
   * bit 6: not formatted
-Used as information about the type of controller aftre initialisation:
+Used as information about the type of controller after initialisation:
   * 43 ('C'): single density controller
   * 44 ('D'): double density controller
@@ Line 170: / Line 170: @@
 ====== Keyboard scanning, interrupts, custom character tables ======
+===== 59: SEQUCE - Screen rendering state =====
+This is used as state saving for the screen display state machine. In particular, it allows rendering of multi-byte accented characters.
+===== 5A: US1 =====
+Temporary parameter storage for US escape sequences
+===== 5B: ACCENT =====
+Temporary storage for multi-byte accented characters
+===== 5C,5D: SS2GET, SS3GET =====
+Screen State machine temporary storage. These store the two parameters for multi-byte accent sequences.
+===== 5E-5F: SWIPT - Software interrupt table pointer =====
+This points to the table of system calls used by the SWI handler. Modifying this value allows redirecting the handlers for your own use.
+===== 61-62: TIMEPT - Ticker routine pointer =====
+This points to a routine to be called on every interrupt.
+===== 63: SEMIRQ =====
+Set to a non-zero value to re-route the IRQ handler using the IRQPT below
+===== 64-65: IRQPT =====
+Pointer to a routine to call on interrupt when SEMIRQ is set.
+===== 67-68: FIRQPT =====
+Pointer to a routine to call on FIRQ. This is either the lightpen scan, or the barcode reader.
+===== 6A-6B: SIMUL =====
+===== 6D-6E: CHRPTR =====
+Pointer to keyboard decoding table (used by GETCH)
+===== 70-71: USERAFF =====
+Pointer to user characters for codes 128-255.
+===== 73-74: GENPTR =====
+Pointer to characters for codes 32-127. Characters are stored bottom to top.
+===== 76: LATCLV - Keyboard repeat delay =====
+===== 77: GRCODE =====
+Control char to send to printer to switch to graphic mode.
+===== 78: DECALG =====
+Lightpen calibration offset
+===== 7F: DEFDST =====
+Default density for current floppy controller.
+===== 80: DKFLG =====
+Set to FF if there is a floppy controller connected.
+===== 82-85: serial port variables =====
+These are not used for anything in the ROM, but the software provided with the RF57 serial extension uses this area.
+===== 81-CC: system stack =====
+The stack grows downwards.
+===== CD-E4: LPBUF =====
+Working area for the lightpen reading code.
+===== FE-FF: FSTRST - Fast Reset =====
+This is set on first boot after the direct-page has been initialized. The Reset handler checks for this, and doesn't repeat all initializations (memory clearing, etc) if this is the case.