Model 200 serial interface - Revision history

Jhoger: /* Overview */

2010-11-23T05:21:54Z

Overview

← Older revision		Revision as of 22:21, 22 November 2010
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	== Overview ==		== Overview ==

	The BASIC ROM provides access to the serial port. BASIC ROM support is well documented elsewhere. This article covers direct use of the [[~~80C52~~]] on the Tandy 200.		The BASIC ROM provides access to the serial port. BASIC ROM support is well documented elsewhere. This article covers direct use of the [[Media:82C51.pdf\|82C51]] on the Tandy 200.

	== Configuration ==		== Configuration ==

Jhoger: /* Baud Rate */

2009-03-25T03:35:48Z

Baud Rate

← Older revision		Revision as of 20:35, 24 March 2009
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	=== Baud Rate ===		=== Baud Rate ===

	<big>INFORMATION BELOW IS NOT ACCURATE FOR T200<big>		<big>INFORMATION BELOW IS NOT ACCURATE FOR T200</big>

Jhoger: /* Baud Rate */

2009-03-25T03:35:32Z

Baud Rate

← Older revision		Revision as of 20:35, 24 March 2009
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	\|}		\|}
	=== Baud Rate ===		=== Baud Rate ===
	~~--uptohere--~~
			<big>INFORMATION BELOW IS NOT ACCURATE FOR T200<big>


	CPU selection of baud rate is accomplished by loading a divisor into the PIO register through output ports <code>$BC</code> or <code>$B4</code> and <code>$BD</code> or <code>$B5</code>.		CPU selection of baud rate is accomplished by loading a divisor into the PIO register through output ports <code>$BC</code> or <code>$B4</code> and <code>$BD</code> or <code>$B5</code>.

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	\|-		\|-
	\| 76800 \|\| 4 \|\| 64 \|\| 2		\| 76800 \|\| 4 \|\| 64 \|\| 2
	\|-
	~~\| 153600 \|\| 4 \|\| 64 \|\| 1~~
	\|}		\|}

	I include 76800 ~~and 153600~~ since ~~they are~~ the highest baud ~~rates~~ that the M100 is capable of. Certainly they are usable for communicating with another Model 100. However since they are not a "known" baud rate, they are less useful for communicating with PCs or other devices.		I include 76800 since it is the highest baud rate that the M100 is capable of. Certainly they are usable for communicating with another Model 100. However since they are not a "known" baud rate, they are less useful for communicating with PCs or other devices.

	That said, you may be able to find a device or bitbang GPIO lines to communicate at these rates. I have read that some USB->Serial adapters are capable of communicating at many more baud rates than the typical built-in serial ports, so there is definitely room for further exploration.		That said, you may be able to find a device or bitbang GPIO lines to communicate at these rates. I have read that some USB->Serial adapters are capable of communicating at many more baud rates than the typical built-in serial ports, so there is definitely room for further exploration.

78.69.53.223 at 21:19, 22 March 2009

2009-03-22T21:19:10Z

← Older revision		Revision as of 14:19, 22 March 2009
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	=== Serial Word Format ===		=== Serial Word Format ===

	Port <code>$C0</code> controls the mode ~~configuration, bit~~ configuration and command register.		Port <code>$C0</code> controls the mode configuration and command register.

	Mode configuration		Mode configuration (Asyncronous)
	{\| border="1" cellpadding="5" cellspacing="0" style="border-width: thin; border-style: solid; border-color: blue; border-collapse: collapse;"		{\| border="1" cellpadding="5" cellspacing="0" style="border-width: thin; border-style: solid; border-color: blue; border-collapse: collapse;"
	\|Bit \|\| Function \|\| Settings		\|Bit \|\| Function \|\| Settings
Line 34:		Line 34:
	\|}		\|}

	~~Bit~~ configuration		Mode configuration (Syncronous)
	{\| border="1" cellpadding="5" cellspacing="0" style="border-width: thin; border-style: solid; border-color: blue; border-collapse: collapse;"		{\| border="1" cellpadding="5" cellspacing="0" style="border-width: thin; border-style: solid; border-color: blue; border-collapse: collapse;"
	\|Bit \|\| Function \|\| Settings		\|Bit \|\| Function \|\| Settings

78.69.53.223 at 21:17, 22 March 2009

2009-03-22T21:17:09Z

@@ Line 19: / Line 19: @@
 === Serial Word Format ===
-Port <code>$C0</code> controls the serial word format.
+Port <code>$C0</code> controls the mode configuration, bit configuration and command register.
 {| border="1" cellpadding="5" cellspacing="0" style="border-width: thin; border-style: solid; border-color: blue; border-collapse: collapse;"
 |Bit ||	Function			|| Settings
@@ Line 30: / Line 31: @@
 |4-5 ||	Parity Inhibit			|| 00 &rarr; No Parity<br/>01 &rarr; Odd parity<br>10 &rarr; No Parity<br/>11 &rarr; Even parity
 |-
-|6-7 ||	Character Length Select		|| Bits:<br/>00 &rarr; 5<br/>01 &rarr; 6<br/>10 &rarr;  7<br/>11 &rarr; 8
+|6-7 ||	Stop Bits			|| 00 &rarr; Inhibit<br>01 &rarr; 1<br>10 &rarr; 1.5<br>11 &rarr; 2
 |-
-|7-5 ||	Stop Bits			|| 00 &rarr; Inhibit<br>01 &rarr; 1<br>10 &rarr; 1.5<br>11 &rarr; 2
+|0-1 ||	Not used			|| 00
 |}
 === Baud Rate ===
 --uptohere--

78.69.53.223 at 17:07, 22 March 2009

2009-03-22T17:07:39Z

Show changes

78.69.53.223: New page: 82c51

2009-03-22T16:13:42Z

New page: 82c51

New page

82c51