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@ -45,33 +45,54 @@ for testing and programming. It allows programs to be entered, |
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memory to be examined, and input/output devices to be read or |
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written to. |
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It's key advantage is that is available at boot up. |
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It's key advantage is that is available at boot up. |
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Its key disadvantages are that code cannot be entered in assembly language |
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and there is no ability to save to memory devices. |
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The available memory are for programming is `0200-EDFFh`. The following areas are reserved: |
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Memory Area | Function |
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------------|----------------------------------- |
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`0000-00FFh`| Jump and restart (RST) vectors |
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`0100-01FFh`| HBIOS configuration block |
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`FE00-FFFFh`| HBIOS proxy |
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Commands can be entered at the command prompt `>` |
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Automatic case conversion takes place on command entry and all arguments are expected to be in hex format. |
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The current memory bank in low memory is displayed before the prompt i.e.: |
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`8E>` |
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Refer to the RomWBW Architecture manual for details memory banking. |
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A quick guide to using the Monitor program follows: |
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## ? - Displays a summary of available commands. |
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``` |
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Monitor Commands (all values in hex):` |
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B - Boot system` |
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D xxxx yyyy - Dump memory from xxxx to yyyy` |
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F xxxx yyyy zz - Fill memory from xxxx to yyyy with zz` |
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H - Halt system` |
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I xxxx - Input from port xxxx` |
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K - Keyboard echo` |
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L - Load Intel hex data` |
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M xxxx yyyy zzzz - Move memory block xxxx-yyyy to zzzz` |
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O xxxx yy - Output value yy to port xxxx` |
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P xxxx - Program RAM at address xxxx` |
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R xxxx - Run code at address xxxx` |
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S xx - Set bank to xx` |
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X - Exit monitor` |
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Monitor Commands (all values in hex): |
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B - Boot system |
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D xxxx yyyy - Dump memory from xxxx to yyyy |
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F xxxx yyyy zz - Fill memory from xxxx to yyyy with zz |
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H - Halt system |
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I xxxx - Input from port xxxx |
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K - Keyboard echo |
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L - Load Intel hex data |
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M xxxx yyyy zzzz - Move memory block xxxx-yyyy to zzzz |
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O xxxx yy - Output value yy to port xxxx |
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P xxxx - Program RAM at address xxxx |
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R xxxx [[yy] [zzzz]] - Run code at address xxxx |
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Pass yy and zzzz to register A and BC |
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S xx - Set bank to xx |
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X - Exit monitor |
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``` |
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## Cold Boot |
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B - Performs a cold boot of the ROMWBW system. A complete |
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reinitialization of the system is performed and the system |
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re-initialization of the system is performed and the system |
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returns to the Boot Loader prompt. |
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## Dump Memory |
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@ -160,10 +181,19 @@ Use clip leaded LEDs to confirm the data written. |
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## Program memory location |
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P xxxx - Program memory location xxxx. This routine will |
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allow you to program a hexidecimal into memory starting |
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allow you to program a hexadecimal into memory starting |
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at location xxxx. Press 'Enter' on a blank line to |
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return to the Monitor prompt. |
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## Run program |
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R xxxx [[yy] [zzzz]] - Run program at location xxxx. if optional |
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arguments yy and zzzz are entered they are loaded into the |
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A and BC register respectively. The return address of the |
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Monitor is saved on the stack so the program can return |
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to the monitor. On return to the monitor, the contents of |
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the A, HL, DE and BC registers are displayed. |
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## NOTES: |
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The Monitor allows access to all memory locations. ROM and |
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@ -187,4 +217,4 @@ and then run RTC to see the options list. |
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# Network Boot |
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# ZModem Flash Update |
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# ZModem Flash Update |
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Wayne Warthen
4 years ago
GitHub