Casio PV-1000/ASIC registers: Revision history

29 May 2023

• curprev 22:0422:04, 29 May 2023‎ Lidnariq talk contribs‎ 5,062 bytes +126‎ →‎Interrupt enable ($FC) > write: an edge case I meant to check and Par did
• curprev 20:1320:13, 29 May 2023‎ Lidnariq talk contribs‎ 4,936 bytes +35‎ Off-by-one in IRQ timing (end of previous scanline), additional info from Par

25 May 2023

• curprev 02:4402:44, 25 May 2023‎ Lidnariq talk contribs‎ 4,901 bytes +111‎ →‎Interrupt enable ($FC) > write: IRQ timing

23 May 2023

• curprev 19:0719:07, 23 May 2023‎ Lidnariq talk contribs‎ m 4,790 bytes 0‎ Lidnariq moved page Casio PV-1000/ULA registers to Casio PV-1000/ASIC registers without leaving a redirect: not an uncommited logic array

22 May 2023

• curprev 17:0717:07, 22 May 2023‎ Lidnariq talk contribs‎ 4,790 bytes +99‎ →‎Interrupt status? ($FC) < read
• curprev 04:3904:39, 22 May 2023‎ Lidnariq talk contribs‎ m 4,691 bytes +28‎ 5% resistors on the volume mixing make this not a precision instrument

21 May 2023

• curprev 20:2420:24, 21 May 2023‎ Lidnariq talk contribs‎ 4,663 bytes +3‎ →‎GPO ($FD) > write: not a useful vblank irq
• curprev 20:2320:23, 21 May 2023‎ Lidnariq talk contribs‎ 4,660 bytes +221‎ →‎Interrupt enable ($FC) > write: irq timing

18 May 2023

• curprev 19:0519:05, 18 May 2023‎ Lidnariq talk contribs‎ 4,439 bytes +143‎ No edit summary

7 May 2023

• curprev 19:0619:06, 7 May 2023‎ Lidnariq talk contribs‎ 4,296 bytes +102‎ →‎Display properties ($FF) > write

20 April 2023

• curprev 01:4301:43, 20 April 2023‎ Lidnariq talk contribs‎ 4,194 bytes +98‎ →‎Square 1 ($F8) > write

15 April 2023

• curprev 02:2102:21, 15 April 2023‎ Lidnariq talk contribs‎ 4,096 bytes +393‎ →‎Sound control ($FB) > write: describe highpass filters
• curprev 02:1502:15, 15 April 2023‎ Lidnariq talk contribs‎ m 3,703 bytes +3‎ →‎Display properties ($FF) > write: explicitly call out RGB mapping for border color, so reletter the other bits too

10 April 2023

• curprev 03:0003:00, 10 April 2023‎ Lidnariq talk contribs‎ 3,700 bytes −9‎ →‎Sound control ($FB) > write: there's only one conceptual squareFA
• curprev 02:5902:59, 10 April 2023‎ Lidnariq talk contribs‎ 3,709 bytes +113‎ →‎Square 1 ($F8) > write: shared clock
• curprev 01:4701:47, 10 April 2023‎ Lidnariq talk contribs‎ 3,596 bytes +37‎ not an "Uncommitted Logic Array"
• curprev 00:2400:24, 10 April 2023‎ Lidnariq talk contribs‎ 3,559 bytes +93‎ →‎Square 1 ($F8) > write: more of plgDavid's findings
• curprev 00:2100:21, 10 April 2023‎ Lidnariq talk contribs‎ 3,466 bytes +6‎ →‎Sound control ($FB) > write
• curprev 00:2100:21, 10 April 2023‎ Lidnariq talk contribs‎ 3,460 bytes +183‎ →‎Sound control ($FB) > write: update with plgDavid's research

6 April 2023

• curprev 23:0823:08, 6 April 2023‎ Lidnariq talk contribs‎ 3,277 bytes +358‎ port FB is some kind of sound control
• curprev 22:0022:00, 6 April 2023‎ Lidnariq talk contribs‎ 2,919 bytes +26‎ →‎Display properties ($FF) > write: indeed, display disable

5 April 2023

• curprev 04:5404:54, 5 April 2023‎ Lidnariq talk contribs‎ m 2,893 bytes 0‎ →‎Display properties ($FF) > write: typo
• curprev 04:5404:54, 5 April 2023‎ Lidnariq talk contribs‎ m 2,893 bytes +15‎ →‎Display properties ($FF) > write: more clear
• curprev 03:1203:12, 5 April 2023‎ Lidnariq talk contribs‎ 2,878 bytes +18‎ →‎Display properties ($FF) > write: pattern RAM address moveable

4 April 2023

• curprev 00:2400:24, 4 April 2023‎ Lidnariq talk contribs‎ 2,860 bytes +140‎ →‎Tilemap address ($FE) > write: new test result

3 April 2023

• curprev 06:0306:03, 3 April 2023‎ Lidnariq talk contribs‎ 2,720 bytes +2,720‎ Created page with "The µPD65010G031 ULA has 10 total ports. They are fully decoded, available via Z80 I/O instructions at $F8-$FF. There are eight write-only functions and two read-only functions. === Square 1 ($F8) > write === 7 bit 0 ..PP PPPP || |||| ++-++++--- Period for first square wave. f_square = f_ULA ÷ 1024 ÷ (63-P) ≈ 8739 Hz ÷ (63-P) Where f_ULA is the 17.897727MHz crystal divided by 2. If P is specified to be 63, it instead si..."