Dk'tronics memory expansion - Revision history

Gryzor at 13:52, 30 March 2026

2026-03-30T13:52:28Z

Gryzor: 256K schematics by TotO added

2026-03-30T13:51:12Z

256K schematics by TotO added

Polluks: /* RSX Commands (Memory Expansion) */

2024-07-17T18:55:37Z

‎RSX Commands (Memory Expansion)

Jonathanen: /* Mods */

2020-10-01T13:53:58Z

‎Mods

Jonathanen: /* Mods */

2020-10-01T13:41:08Z

‎Mods

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Arnoldemu: /* CPM */

2018-05-20T09:25:51Z

‎CPM

Arnoldemu: /* RSX Commands (Silicon Disc) */

2018-05-17T12:59:12Z

‎RSX Commands (Silicon Disc)

Arnoldemu: /* 256KB RAM */

2017-07-07T18:23:16Z

‎256KB RAM

Arnoldemu: /* 256KB RAM */

2017-07-01T15:15:36Z

‎256KB RAM

Arnoldemu: /* Technical */

2017-07-01T15:14:47Z

‎Technical

@@ Line 146: / Line 146: @@
 * [[Media:DK'Tronics Peripheral - Technical Manual (Edition 1).pdf|DK'Tronics Peripheral - (Edition 1) Technical Manual]] (pdf) {{EN}}
 * [[Media:DK'tronics Manuel de Utilisation de la RAM d'Extension.pdf|DK'Tronics Manuel de Utilisation de la RAM d'Extension]] (pdf) {{FR}}
-* [[File:DK256.zip Schematic provided by TotO]]
+* [[File:DK256.zip|Schematic provided by TotO]] Schematic provided by TotO
 == Download  ==

@@ Line 146: / Line 146: @@
 * [[Media:DK'Tronics Peripheral - Technical Manual (Edition 1).pdf|DK'Tronics Peripheral - (Edition 1) Technical Manual]] (pdf) {{EN}}
 * [[Media:DK'tronics Manuel de Utilisation de la RAM d'Extension.pdf|DK'Tronics Manuel de Utilisation de la RAM d'Extension]] (pdf) {{FR}}
 == Download  ==

@@ Line 99: / Line 99: @@
 The Bank Switch Software RSX commands are:
-* |Bank, n            - Map a 16K bank directly into memory space (where n is the bank No.)
+* <code>|Bank, n</code>            - Map a 16K bank directly into memory space (where n is the bank No.)
-* |Swap                - Alternate between high and low screens
+* <code>|Swap</code>                - Alternate between high and low screens
-* |Low                  - Change to the low screen
+* <code>|Low</code>                  - Change to the low screen
-* |High                 - Change to the high (default) screen
+* <code>|High</code>                 - Change to the high (default) screen
-* |Saves, n           - Store a screen to a 16K bank (where n is the bank No.)
+* <code>|Saves, n</code>           - Store a screen to a 16K bank (where n is the bank No.)
-* |Loads, n            - Retrieve a screen from a 16K bank (where n is the bank No.)
+* <code>|Loads, n</code>            - Retrieve a screen from a 16K bank (where n is the bank No.)
-* |Savew, w, n      - Stores a windows contents into a 16K bank (where n is the bank No.)
+* <code>|Savew, w, n</code>      - Stores a windows contents into a 16K bank (where n is the bank No.)
-* |Loadw, w, n       - Load a window with the data from a 16K bank (where n is the bank No.)
+* <code>|Loadw, w, n</code>       - Load a window with the data from a 16K bank (where n is the bank No.)
-* |Saved, n, s, l     - Transfer original RAM to expansion RAM
+* <code>|Saved, n, s, l</code>     - Transfer original RAM to expansion RAM
-* |Loadd, n, s, l      - Load original RAM from expansion RAM
+* <code>|Loadd, n, s, l</code>      - Load original RAM from expansion RAM
-* |Peek, n, s, v      - Read the value of a byte in the expansion RAM
+* <code>|Peek, n, s, v</code>      - Read the value of a byte in the expansion RAM
-* |Poke, n, s, v      - Write to a byte in the expansion RAM
+* <code>|Poke, n, s, v</code>      - Write to a byte in the expansion RAM
 A further command which was considered to be only for 'advanced' users was also described later in the handbook:
-* |Askram, E, V (E=enquiry No. V=variable) could be used to request information from the expansion card, including the amount of RAM available (where E=1), return the number of banks available (where E=2) or (E=3) returned a 0 or 1 to indicate whether the expansion card 'had a problem'.
+* <code>|Askram, E, V</code> (E=enquiry No. V=variable) could be used to request information from the expansion card, including the amount of RAM available (where E=1), return the number of banks available (where E=2) or (E=3) returned a 0 or 1 to indicate whether the expansion card 'had a problem'.
 == RSX Commands (Silicon Disc) ==

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 * [[Media:Upgrade 64K-256K Dk'tronics - TAU 29 pg 04.jpg|Upgrade a 64K expansion to a 256K expansion]] - from the Australian Mag : TAU 29 pag 04.
-* An article in Amstrad Action (Issue 46, July 1989, [[:File:AmstradAction046-16.jpg|page 16]] and [[:File:AmstradAction046-17.jpg|17]]) described how a Silicon Disk can be converted into a memory expansion.
+* An article in [[Amstrad Action]] ([[Amstrad_Action,_Issue_46,_Jul_1989|Issue 46, July 1989]], [[:File:AmstradAction046-16.jpg|page 16]] and [[:File:AmstradAction046-17.jpg|17]]) described how a Silicon Disk can be converted into a memory expansion.
 == Manuals ==

@@ Line 136: / Line 136: @@
 * [[Media:Upgrade 64K-256K Dk'tronics - TAU 29 pg 04.jpg|Upgrade a 64K expansion to a 256K expansion]] - from the Australian Mag : TAU 29 pag 04.
-* An article in Amstrad Action (Issue 46, July 1989, page 16 and 17) described how a Silicon Disk can be converted into a memory expansion.
+* An article in Amstrad Action (Issue 46, July 1989, [[:File:AmstradAction046-16.jpg|page 16]] and [[:File:AmstradAction046-17.jpg|17]]) described how a Silicon Disk can be converted into a memory expansion.
 == Manuals ==

@@ Line 124: / Line 124: @@
 == CPM ==
-Dk'tronics Bank Switch software came with a CP/M COM program to patch CP/M 2.2 to use the Dk'tronics RAM to get 61K TPA.
+Dk'tronics Bank Switch software comes with NEWCPM.COM CP/M program which installs a 61K TPA CPM2.2 which uses the Dk'Tronics RAM.
 See [[DkTronics_CPM]].

← Older revision		Revision as of 12:59, 17 May 2018
Line 121:		Line 121:

	... - [See manual for now]		... - [See manual for now]
		+
		+	== CPM ==
		+
		+	Dk'tronics Bank Switch software came with a CP/M COM program to patch CP/M 2.2 to use the Dk'tronics RAM to get 61K TPA.
		+	See [[DkTronics_CPM]].
		+
		+	The manual also describes how to patch CPM+ (which is already compatible with Dk'Tronics RAM to run on 464/664).

	== Reviews ==		== Reviews ==

@@ Line 38: / Line 38: @@
 === 256KB RAM ===
-This uses 4 banks (effectively 0-3 on 464 and 2-3 on 6128). It appears the 256KB RAM detects the 6128, possibly using /EXP but this is to be confirmed, so that it doesn't conflict with the 'extra 64KB' (i.e. c4-c7) RAM of the 6128.
+This uses 4 banks (effectively 0-3 on 464 and 1-3 on 6128). It appears the 256KB RAM detects the 6128, possibly using /EXP but this is to be confirmed, so that it doesn't conflict with the 'extra 64KB' (i.e. c4-c7) RAM of the 6128.
 The decoding looks like this:

@@ Line 38: / Line 38: @@
 === 256KB RAM ===
-This uses 4 banks (effectively 0-3 on 464 and 2-3 on 6128). It appears the 256KB RAM detects the 6128, possibly using /EXP but this is to be confirmed, so that it doesn't conflict with the internal RAM of the 6128.
+This uses 4 banks (effectively 0-3 on 464 and 2-3 on 6128). It appears the 256KB RAM detects the 6128, possibly using /EXP but this is to be confirmed, so that it doesn't conflict with the 'extra 64KB' (i.e. c4-c7) RAM of the 6128.
 The decoding looks like this:
@@ Line 47: / Line 47: @@
 s = selection (0-7)
 On 6128 you get 256KB RAM + internal 64KB base RAM
 === 256KB Silicon Disk ===

@@ Line 19: / Line 19: @@
 For general info on I/O Ports, see:
 * [[Standard Memory Expansions]].
 === Bank Numbers ===
@@ Line 25: / Line 65: @@
 * 256K Expansion uses four 64K banks (bank 0..3)
 * 256K Silicon Disc uses four 64K banks (bank 4..7)
 The 256K Expansion and 256K Silicon Disc can be used together, resulting in 512K RAM in eight banks (bank 0..7). Plus, the 64K internal RAM is used (so total RAM is 576K).