KC Compact - Revision history

Phi2x: /* Video */

2024-07-07T08:59:06Z

‎Video

2024-07-07T08:44:50Z

‎Hardware differences

2023-11-14T22:43:19Z

added first disc interface picture

2023-01-19T01:33:33Z

‎Expansion socket: Added the reference to the K1520 bus

2022-02-28T16:59:59Z

‎Operating systems

2016-01-11T21:19:49Z

‎Video

2016-01-11T21:17:49Z

‎UA880 CPU (equivalent to Zilog Z80)

2015-09-16T16:28:47Z

‎Video

2012-12-14T23:12:10Z

We didn't revert this when I got it wrong before :P

2012-12-03T09:16:43Z

@@ Line 89: / Line 89: @@
 * The [[CRTC]] should be more or less same as those used in CPCs. The handbook and schematic say the CRTC is a CM 607 (Bulgarian clone of 6845), but the CRTC in mine [=Kevin's] is an HD6845P.
 * The clocks for each mode (0,1 and 2) are derived from the main 16MHz clock, these then drive the shift registers to output pixels to the display.
-* Mode 3 is hardwired to 5V, so it doesn't have a clock. The shift registers are stopped and output the last colour they clocked in. Even if this mode was activated in way of connecting up the clock for Mode 0 it is not decoded the same as on the CPC: 8 colours are chosen from the 16 colour palette, instead of 4.
+* Graphics Mode 3 is hardwired to 5V, so it doesn't have a clock. The shift registers are stopped and output the last colour they clocked in. Even if this mode was activated in way of connecting up the clock for Mode 0 it is not decoded the same as on the CPC: 8 colours are chosen from the 16 colour palette, instead of 4.
 * There may be a bug whereby if the border colour is changed rapidly there could be 1 pixel of another colour output. When loading a game which changes the colour of the border, I have seen moving "snow" on the screen. I have seen this effect, but I need to confirm how it is generated.
 * The video output doesn't generate luminance, so the KC Compact can't be used with a GT64 or MM14.

@@ Line 76: / Line 76: @@
 * The colour palette is not cleared to black on reset
-* The Amstrad unofficial mode (bit 1=bit 0=1 of [[Gate Array]] mode register) does not exist. The clock to the shift registers is stopped. The last colour is output.
+* The Amstrad unofficial graphics mode 3 does not exist. The clock to the shift registers is stopped. The last colour is output.
 * The raster interrupt is generated in a different way by the CIO.

@@ Line 356: / Line 356: @@
 Image:KCCompact_Keyboard_Top.jpg|Keyboard Top
 Image:KCCompact_Keyboard_Bottom.jpg|Keyboard bottom
 </gallery>

@@ Line 159: / Line 159: @@
 === Expansion socket ===
-The KC compact has a real connector compared to the P.C.B. edge connector of an English CPC6128. The connector appears to be a PC Card connector. This connector is not the same as the one on a German CPC6128.
+The KC compact has a real connector compared to the P.C.B. edge connector of an English CPC6128. This connector is not the same as the one on a German CPC6128.
 The expansion connector has more pins; 58 compared to 50 on an English CPC6128.
 I am in the process of making an adaptor so that I can test CPC hardware on the KC Compact.

@@ Line 404: / Line 404: @@
 * [[AMSDOS#BASDOS|BASDOS]] - AMSDOS clone
 * [[CP/M#MicroDOS|MicroDOS]] - CP/M clone
 == KC Compact Computer Resources and Links ==

@@ Line 83: / Line 83: @@
 == UA880 CPU (equivalent to Zilog Z80) ==
-The KC compact uses a UA880 CPU, which is a Russian clone of the [[Z80]]. It is not confirmed whether there are any actual differences compared to a real Z80. In terms of documentation, the KC Compact System Handbook lists the opcodes SLL, INF [a.k.a. IN F,(C)], and OUTF [a.k.a. OUT (C),F], whereas these have remained undocumented by Zilog.
+The KC compact uses a UA880 CPU, which is an East German clone of the [[Z80]]. It is not confirmed whether there are any actual differences compared to a real Z80. In terms of documentation, the KC Compact System Handbook lists the opcodes SLL, INF [a.k.a. IN F,(C)], and OUTF [a.k.a. OUT (C),F], whereas these have remained undocumented by Zilog.
 == Video ==

@@ Line 87: / Line 87: @@
 == Video ==
-* The [[CRTC]] should be more or less same as those used in CPCs. The handbook and schematic say the CRTC is a CM 607, but the CRTC in CPCLER's an HD6845P.
+* The [[CRTC]] should be more or less same as those used in CPCs. The handbook and schematic say the CRTC is a CM 607, but the CRTC in mine [=Kevin's] is an HD6845P.
 * The clocks for each mode (0,1 and 2) are derived from the main 16Mhz clock, these then drive the shift registers to output pixels to the display.
 * Mode 3 is hardwired to 5V, so it doesn't have a clock. The shift registers are stopped and output the last colour they clocked in. Even if this mode was activated in way of connecting up the clock for Mode 0 it is not decoded the same as on the CPC: 8 colours are chosen from the 16 colour palette, instead of 4.

← Older revision		Revision as of 09:16, 3 December 2012
Line 1:		Line 1:
−	''Note: Much of this article was originally written by [[~~User:Kevin Thacker\|~~Kevin Thacker]] and so any references in the first person ("I", "me", ''etc.'') are ~~probably~~ by him.	+	''Note: Much of this article was originally written by [[Kevin Thacker]] and so any references in the first person ("I", "me", ''etc.'') are by him.

	[[Image:Kcc top.jpg\|right\|thumb\|250px\|The East German KC Compact Computer]]		[[Image:Kcc top.jpg\|right\|thumb\|250px\|The East German KC Compact Computer]]