| Line 2... |
Line 2... |
0002 0000 ; tb1.asm -- light8080 core basic demo: 'Hello World!"
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0002 0000 ; tb1.asm -- light8080 core basic demo: 'Hello World!"
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0003 0000 ;*******************************************************************************
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0003 0000 ;*******************************************************************************
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0004 0000 ; Should be used with SoC vhdl\soc\l80soc.vhdl
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0004 0000 ; Should be used with SoC vhdl\soc\l80soc.vhdl
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0005 0000 ; Assembler format compatible with TASM for DOS and Linux.
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0005 0000 ; Assembler format compatible with TASM for DOS and Linux.
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0006 0000 ;*******************************************************************************
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0006 0000 ;*******************************************************************************
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0007 0000 ; This program will print a Hello message to a 19200/8/N/1 serial port, then
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0007 0000 ; This program will print a Hello message to a 9600/8/N/1 serial port, then
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0008 0000 ; will loop forever copying the input port P1 to the output port P2.
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0008 0000 ; will loop forever copying the input port P1 to the output port P2.
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0009 0000 ; This demo is meant to be used as a starting point for those wanting to play
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0009 0000 ; This demo is meant to be used as a starting point for those wanting to play
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0010 0000 ; with the l80soc core -- which in turn is little more than an usage example
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0010 0000 ; with the l80soc core -- which in turn is little more than an usage example
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0011 0000 ; for the light8080 cpu core.
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0011 0000 ; for the light8080 cpu core.
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0012 0000 ; See the readme file for instructions for setting up a project with this
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0012 0000 ; See the readme file for instructions for setting up a project with this
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| Line 63... |
Line 63... |
0063 0063 21 EB 00 lxi h,void_buffer
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0063 0063 21 EB 00 lxi h,void_buffer
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0064 0066 22 EC 00 shld ptr_tx
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0064 0066 22 EC 00 shld ptr_tx
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0065 0069 21 F0 00 lxi h,rx_buffer
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0065 0069 21 F0 00 lxi h,rx_buffer
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0066 006C 22 EE 00 shld ptr_rx
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0066 006C 22 EE 00 shld ptr_rx
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0067 006F ; Set up UART baud rate to 9600 bauds @ 50MHz:
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0067 006F ; Set up UART baud rate to 9600 bauds @ 50MHz:
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0068 006F ; (50E6 / 16) / 9600 = 325d = 145h
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0068 006F ; (50E6 / 9600) = 5208d = 1458h
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0069 006F 3E 14 mvi a,14h ;
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0069 006F 3E 14 mvi a,14h
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0070 0071 D3 83 out UART_BAUDH
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0070 0071 D3 83 out UART_BAUDH
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0071 0073 3E 58 mvi a,58h
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0071 0073 3E 58 mvi a,58h
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0072 0075 D3 82 out UART_BAUDL
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0072 0075 D3 82 out UART_BAUDL
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0073 0077
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0073 0077
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0074 0077 ; Clear P2 port
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0074 0077 ; Clear P2 port
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